Product Overview - Flamco

Product Overview 

Edition 56

Contact 

About Flamco 

Flamco is an internationally active company with its 

own production facilities in the Netherlands, Germany 

and U.K. In addition Flamco has its own offices and 

sales organisations in many countries, including the 

Netherlands, Germany, the U.K., Sweden, Denmark, 

Poland, Belgium, France and Switzerland. Flamco is 

represented by exclusive distributors in many other 

countries, from Iceland to Japan and from Portugal to 

Australia. With more than 30 million Flexcon 

expansion vessels sold, Flamco is a major player 

throughout Europe and was the first company to 

introduce expansion vessels and sealed system 

equipment to U.K. over thirty five years ago. 

Our continuing success over the decades cannot be 

ascribed solely to our good name - that is hardly 

sufficient in such a competitive market - the success of 

the name FLEXCON is the result of assured quality 

and continuous development. Specifying and using 

Flamco equipment means you receive a complete 

service from the most reliable company in it’s field. 

Peace of mind knowing that you comply with the 

regulations and a direct link with the manufacturer 

gives the confidence required to carry out the work 

effectively. 

Consultants, Buyers, Installers and the End-User can 

be assured that Flamco is their reliable partner in 

heating, air conditioning and water services technology. 

Flamco Location 

Offices and Technical Support 

Production 

Warehousing Training Eco Technology Centre 

4 Productoverview • 2012 Technical specifications are subject to change.

 

 

Flamco UK Limited 

Washway Lane 

St. Helens 

Merseyside WA10 6PB 

T 01744 744 744 

F 01744 744 700 

E info@flamco.co.uk 

I www.flamco.co.uk 

The new Flamco Offices, Manufacturing 

Plant and Eco Technology Centre (ETC), is 

set in St Helens, close to both Liverpool 

and Manchester. The site enjoys 

excellent motorway and rail links 

offering a central base for delivery 

throughout the UK. 

Londonderry 

BT 

Omagh 

Armagh 

Enniskillen 

Truro 

TR 

HS 

Stornoway 

Larne 

Bangor 

BELFAST 

PA 

IV 

G 

Glasgow 

KA 

FK 

Stirling 

DC 

IM 

Douglas 

Inverness 

PH 

ML 

Dumfries 

KW 

DD 

AB 

Dundee 

Glenrothes 

Edinburgh 

EH 

Kirkwall 

Aberdeen 

Newton 

St Boswells 

TD 

NE 

Morpeth 

Newcastle 

upon Tyne 

Shetland 

Channel Islands 

Carlisle 

DH SR 

CA Durham 

TS 

LA 

DL Middlesbrough 

Northallerton 

BD HG YO 

FY Preston 

BB 

LS 

Beverley 

PR HX 

BL OL 

HD WF HU 

Liverpool WN 

Wakefield 

M 

DN 

L WA Manchester Barnsley 

Caernarfon 

S 

Mold 

SK 

CH Chester 

LL 

CW Matlock Lincoln 

NG LN 

ST 

Nottingham 

Shrewsbury Stafford DE 

SY 

TF 

LG 

Birmingham 

NR 

WV 

Leicester PE 

Norwich 

Llandrindod 

DY B Royal L.S. 

Wells 

LD 

Northampton 

CV 

SA 

NN 

Carmarthen Worcester 

CB 

WR 

IP 

HR 

Gloucester MK Bedford Cambridge Ipswich 

Cwmbran 

OX Aylesbury SG 

GL 

LU Hertford CO 

CF NP 

Swansea 

Oxford HP AL CM 

EN 

WD N Chelmsford 

Cardiff Bristol 

IG 

HA 

BS 

W RM 

SW 

Reading 

NW 

SL 

E 

UB 

SS 

SW 

RG 

SE 

TW SM LONDON 

Taunton BA Trowbridge KingstonKT BR 

CR 

DA 

MG 

EX 

TA 

SP 

GU 

RH Maidstone 

Winchester 

GT 

SO 

Exeter 

TN 

Dorchester 

BH 

PO Chichester 

PL 

BN 

DT 

Lewes 

TQ 

Newport 

GY 

JE 

ZE 

Productoverview • 2012 

Technical specifications are subject to change. 

5

 

 

Active in the UK and across the world 

for the installation industry 

Flamco focuses on the development, production and 

sale of quality products for heating, ventilation, drinking 

water, air conditioning and cooling. 

With 55 years of experience and around 550 employees, 

Flamco is a global leader in its industry. 

Flamco has seven production locations and delivers 

successful and innovative products for the installation 

industry in more than 60 countries. All of these products 

are available from technical wholesalers and distributors. 

Australia 

Austria 

Bahrain 

Belgium 

Chili 

Cyprus 

Czech Republic 

Denmark 

Estonia 

Finland 

France 

Germany 

Greece 

Hungary 

Iceland 

India 

Italy 

Japan 

Jordan 

Kuwait 

Latvia 

Lebanon 

Lithuania 

New Zealand 

Norway 

Oman 

People’s Republic 

of China 

Poland 

Portugal 

Qatar 

Romania 

Russia 

Saudi Arabia 

Singapore 

Slovakia 

Slovenia 

South Africa 

Spain 

Sweden 

Switzerland 

Syria 

Taiwan 

The Netherlands 

Turkey 

Ukraine 

United Arab Emirates 

United Kingdom 

United States 

6 


Technical specifications are subject to change.

Chapters 

1/2/3... 

Expansion systems and accessories 

1. Diaphragm expansion vessels 12 

2. Pressurisation equipment 32 

3. Accessories for heating and chilled systems 50 

4. Potable water expansion vessels 70 

5. Accessories for potable water installations 88 

6. Water heaters and storage vessels 92 

7. Air and dirt separation 108 

8. Flamco T-plus 130 

9. BREFCO Supaflue vitreous enamelled steel flue system 136 

10. Supaplates 144 

11. Renewables and Sustainable 148 



7

Contents 

1. Diaphragm expansion vessels 

Flexcon Top - 6.0 bar(g) 

Flexcon Top 2 - 25 .......................................................................... 22 

Flexcon Top 35 - 80 ........................................................................ 22 

Vesselpaks 

Cubex 8 - 35 - 3.0 bar(g) ................................................................ 23 

Cubex 50 - 80 - 6.0 bar(g) .............................................................. 23 

Vesselpaks 

Vesselpak Type A ............................................................................ 24 

Vesselpak Type B ........................................................................... 24 

Cubexpak Type A ........................................................................... 25 

Cubexpak Type B ........................................................................... 25 

Combi RepairKit ............................................................................. 25 

Flexcon Solar - 8.0 bar(g) 

Flexcon Solar 8 - 25 ....................................................................... 26 

Flexcon Solar 35 - 80 ..................................................................... 26 

Flexcon 

Flexcon 110 - 1000 - 6.0 bar(g) ...................................................... 27 

Flexcon 110 - 1000 - 10.0 bar(g) .................................................... 27 

Flexcon M 

Flexcon M 80 - 8000 - 6.0 bar(g) .................................................... 29 

Flexcon M 80 - 8000 - 10.0 bar(g) .................................................. 29 

Flexcon intermediate vessels 

Flexcon VSV - 6.0 bar(g) ................................................................. 31 

Flexcon VSV - 10.0 bar(g) ............................................................... 31 

2. Pressurisation equipment 

Sealed system units 

Flexfill Plus ...................................................................................... 36 

MidiFill Plus ..................................................................................... 37 

Flexfiller Digital Glycol Pressurisation ............................................... 37 

Flexfiller Mini ................................................................................... 38 

Flexfiller Midi ................................................................................... 38 

Flexfiller Standard ........................................................................... 38 

Flexfiller Twin System ...................................................................... 38 

Flexcon packaged sealed system units and sets 

Presspak Digital Packaged Sealed System Sets ............................. 39 

Basepak Expansion Equipment ...................................................... 39 

Flexconpak Expansion Equipment .................................................. 39 

Flamcomat III New Control 

D twin pump sets ........................................................................... 48 

Flamcomat vessels 

Flamcomat GB main vessels .......................................................... 49 

Flamcomat BB auxiliary vessels ...................................................... 49 

3. Accessories for heating 

and chilled systems 

Safety valves 

Prescor ........................................................................................... 54 

Prescor S ....................................................................................... 54 

Prescor Solar .................................................................................. 55 

Prescomano ................................................................................... 55 

Flopressmano ................................................................................. 55 

Tundish ........................................................................................... 55 

Isolating unions and flexcon connection sets 

Connection set ½ ........................................................................... 58 

Flexfast ¾ ....................................................................................... 58 

Flexcon pressure gauges 

Pressure gauge .............................................................................. 58 

Pressure/Thermo gauge ................................................................. 58 

Flexcon wall mounting 

Flexconsole ¾ ................................................................................ 59 

Flexconsole Plus ............................................................................. 59 

MB ................................................................................................. 59 

Auxiliairy Products 

Check Valves .................................................................................. 60 

Pressure Reducing Valves ............................................................... 60 

Strainers ......................................................................................... 61 

Component Sets ............................................................................ 61 

Uni-Fil Filling sets ............................................................................ 61 

Supamix FS .................................................................................... 62 

Supamix NHS ................................................................................. 62 

Dosing pots 

Mild steel dosing pots ..................................................................... 63 

Stainless steel dosing pots ............................................................. 63 

FlexBalance hydraulic separator 

FlexBalance F ................................................................................. 66 

FlexBalance Plus hydraulic separator 

FlexBalance Plus F ......................................................................... 67 

FlexBalance EcoPlus C 

FlexBalance EcoPlus C ................................................................... 68 

4. Potable water expansion vessels 

Airfix A 

Airfix A ............................................................................................ 77 

Airfix D 

Airfix D ............................................................................................ 77 

Airfix P 

Airfix P 2 - 35 .................................................................................. 80 

Airfix P 50 - 300 .............................................................................. 81 

Airfix P 500 - 2000 .......................................................................... 81 

Airfix D-E-P 500 - 3000 .................................................................. 81 

Airfix P Horizontal ........................................................................... 81 

Airfix D-E-B 

Airfix D-E-B .................................................................................... 86 

Airfix D-E 

Airfix D-E ........................................................................................ 86 

Airfix D-E-L 

Airfix D-E-L ..................................................................................... 87 

5. Accessories for potable 

water installations 

Prescor B safety valves 

Prescor B ....................................................................................... 90 

Flexofit S watershock arrestor 

Flexofit S ........................................................................................ 90 

T-fitting Flexofit S ............................................................................ 90 

Vessel accessories 

Vessel carrier .................................................................................. 90 

MB ................................................................................................. 91 

SB-A .............................................................................................. 91 

Flexcon DT ..................................................................................... 91 


Contents 

 

1/2/3... 

6. Water heaters and storage vessels 

Supastor SS Direct unvented cylinders 

Supastor Direct (including kit) ......................................................... 98 

Supastor Indirect unvented cylinders 

Supastor Indirect (including kit) ..................................................... 100 

Supastor SS Solar unvented cylinders 

Supastor SS Solar unvented cylinders .......................................... 102 

Bespoke stainless steel water heaters 

Stainless steel single coil industrial cylinders ................................. 104 

Stainless steel twin coil industrial cylinders .................................... 104 

Stainless steel triple coil industrial cylinders ................................... 104 

SS stainless storage vessels 

Stainless 120 - 1000 .................................................................... 105 

PS storage vessels 

PS 50 - 850 .................................................................................. 106 

PS 1000 - 3000 ............................................................................ 107 

7. Air and dirt separation 

Flamcovent microbubble air separators 

Flamcovent ................................................................................... 120 

Flamcovent V ................................................................................ 120 

Flamcovent Solar .......................................................................... 120 

Flamcovent Solar V ....................................................................... 120 

Flamcovent S ............................................................................... 121 

Flamcovent F ................................................................................ 121 

Flamcovent Adaptor ..................................................................... 121 

Flexvent floatvents 

Flexvent ........................................................................................ 124 

Flexvent H .................................................................................... 124 

Flexvent Top ................................................................................. 124 

Flexvent Super .............................................................................. 124 

Flexvent Top Solar ........................................................................ 125 

Flexvent Adaptor .......................................................................... 125 

Intake Preventor Vent P ................................................................ 125 

Flexair air separators 

Flexair G ....................................................................................... 125 

Flexair S ....................................................................................... 125 

Flexair S ....................................................................................... 126 

Flexair F ........................................................................................ 126 

Flamcovent Clean microbubble air separators 

Flamcovent Clean ......................................................................... 126 

Flamcovent Clean S ...................................................................... 127 

Flamcovent Clean F ...................................................................... 127 

Flamco dirt seperators 

Flamco Clean ............................................................................... 127 

Flamco Clean V ............................................................................ 128 

Flamco Clean S ............................................................................ 128 

Flamco Clean F ............................................................................ 128 

Pressure Step Degasser 

Pressure Step Degasser ............................................................... 129 

8. Flamco T-plus 

Flamco T-plus 

T-plus Cast Iron ............................................................................ 134 

T-plus Brass ................................................................................. 135 

T-plus Brass with ball valve ........................................................... 135 

9. BREFCO Supaflue vitreous 

enamelled steel flue system 

Supaflue 

Plain pipe ..................................................................................... 138 

Pipe with Door .............................................................................. 138 

Supaflue Bends 

90° Bend with Door ..................................................................... 139 

110° Bend with Door ................................................................... 139 

135° Bend with Door ................................................................... 139 

150° Bend with Door ................................................................... 139 

110° Bend without Door .............................................................. 139 



Supaflue Tees 

90° Tee ........................................................................................ 140 

135° Tee ...................................................................................... 140 

Stabiliser Tee ................................................................................ 140 

Tee Cap ........................................................................................ 140 

Special Tees to order .................................................................... 140 

Supaflue Adaptors 

Flue Liner Adaptor ........................................................................ 141 

Cut Length Adaptor ...................................................................... 141 

Spun Adaptor or Increaser ............................................................ 141 

300mm Conical Adaptor ............................................................... 141 

Boiler Adaptor .............................................................................. 141 

Supaflue Terminals 

Aluminium Cone Cap .................................................................... 142 

Supaflue Accessories 

Ceiling Ring .................................................................................. 142 

Maintenance Clip .......................................................................... 142 

10. Supaplates 

Standard Supaplates 

RK Supaplates ............................................................................. 146 

RKW Supaplates .......................................................................... 146 

RV Supaplates .............................................................................. 147 

RVC Supaplates ........................................................................... 147 

Twin Supaplates 

RDC Supaplates ........................................................................... 147 

11. Renewables and Sustainable 


Supastor SS Solar unvented cylinders .......................................... 156 


Flexcon Solar 8 - 25 ..................................................................... 157 

Flexcon Solar 35 - 80 ................................................................... 157 


Flamcovent Solar .......................................................................... 158 

Flamcovent Solar V ....................................................................... 158 

Flexvent Solar air vents 

Flexvent Top Solar ........................................................................ 158 

Prescor Solar safety valves 

Prescor Solar ................................................................................ 159 


FlexBalance EcoPlus C ................................................................. 159 



9

Flamco Product Groups 

Diaphragm expansion vessels 

Pressurisation equipment 

Accessories for 

potable water installations 

Water heaters and storage vessels 

Supaflue 

vitreous enamelled steel flue system 

Supaplates 


 

 


heating and chilled systems 

Potable water expansion vessels 

Air and dirt separation 


Renewables and Sustainable 



11

1. 

Diaphragm 

expansion vessels 

Flamco produces a comprehensive range of diaphragm expansion 

vessels. Both the steel vessel and the diaphragm are of the highest 

quality. They are compliant with all prevailing European standards and 

carry the CE mark of conformity. Flamco vessels are available for both 

potable and chilled/heated water systems in sizes ranging from 2 litres 

up to 8,000 litres. 



1 

Selection Guide 

Fixed diaphragm 

Fixed diaphragm packages 

Removable diaphragm 

Flexcon TOP 

• 2 - 80 litres. 

• Max. operating pressure: 6 bar(g). 

• Sunken nitrogen valve. 

• High-pressure alternative 

for smaller systems. 

Vesselpak Type A 

• 2 - 25 litres. 


• All fittings supplied. 

Flexcon M 

• 80 - 8.000 litres. 

• Max. operating pressure: 

6/10/16/25 bar(g). 

• High-quality industrial tank. 

• Larger dimensions available on request. 

Flexcon Solar 

• 8 - 80 litres. 



• For solar systems. 

Vesselpak Type B 

• 2 - 25 litres. 


• All fittings supplied, with safety 

valve supplied separately. 

Cubex 

• 8 - 80 litres. 


3 bar(g) (8 - 35 litres), 

6 bar(g) (50 - 80 litres). 

Cubexpak Type A 

• 8 - 25 litres. 


• All fittings supplied. 


Flexcon 

• 110 - 1.000 litres. 

• Max. operating pressure: 6/10 bar(g). 

• For large systems. 

Cubexpak Type B 

• 8 - 25 litres. 


• All fittings supplied, with safety 

valve supplied separately. 

Flexcon VSV 

• For cooling down water in central 

heating systems. 

• Max. operating temperature: 160 °C. 

• Max. Operating pressure: 6 / 10 bar(g). 



13

Flexcon pressure expansion vessels 

The decision to go for the quality of a Flexcon 

diaphragm pressure expansion vessel is a 

guarantee of satisfaction. 

Flamco has long stood head and shoulders above 

other producers of diaphragm pressure expansion 

vessels. However, a good brand reputation alone is 

not enough for sustained success in a competitive 

market. 

Flamco’s standard programme covers a wide range of 

expansion vessels from 2 - 8,000 litres with a wide 

choice of pre-pressures and maximum operating 

pressures. All models are characterised by their 

construction, topquality diaphragm, high-quality 

coating (on the expansion vessel itself) and efficient 

production methods. 

The two halves of the vessel are 

coated prior to assembly. 

Flexcon expansion vessels 

aredelivered in a stackable 

cardboard packaging and 

each box contains clear 

assembly instructions. 

Flexcon expansion vessels 

are always in stock at our 

wholesalers and our own 

warehouses. 

Qualified Flamco employees 

will be happy to give you 

advice and support. They 

are just a telephone call 

away. 

FLEXCON 2 - 4 

FLEXCON 8 - 25 FLEXCON 35 - 80 FLEXCON 110 - 1,000 

5 

2 

3 

4 4 

2 

6 

5 

3 6 

1 1 

Systems with Flexcon expansion 

vessels 

1. Flexcon expansion vessel. 

2. Prescor Safety valve. 

3. Flamco tundish. 

4. Flamcovent or Flexair air separator. 

5. Flexcon pressure gauge. 

6. Flexfast quick-release coupling. 

The extremely limited 

permeability of the 

diaphragm ensures that 

pre-pressure is retained for 

a long time and guarantees 

a long life. 



1 

Flexcon diaphragm expansion vessels are made 

of top-quality steel and come with a gleaming 

red epoxy coating. 

The clamp is made of heavy-duty thermallygalvanised 

steel (sendzimir). 

Flexcon 35 – 80 suitable for wall or floor mounting. 

From Flexcon 35 upwards, the diaphragm and the 

water valve are protected during storage and 

transport by a special protection cap. 

The benefits of Flexcon 

• The best expansion vessels thanks to our 

groundbreaking technology. 

• Excellent service before, during and after installation. 

• Handy accessories for mounting and unmounting 

Flexcon expansion vessels. 

• Our high quality diaphragms are suitable for use with 

anti-freeze. Exact details are available on request. 

• All vessels are factory tested. 

The thread of the water 

connection is not coated 

which means the expansion 

vessel can be connected 

easily. 

The diaphragm action rolls up 

and down and is thus never 

stretched. This has a 

significant impact on its 

service life. 

The unique clamp 

construction damages 

neither the diaphragm 

nor the two halves of the 

expansion vessel. 

The nitrogen valve of Flexcon 

8 - 80 litre expansion vessels 

is counter sunk and cannot be 

damaged due to the cap and 

extra protective cover. 

When cold, the nitrogen 

cushion presses the 

diaphragm against the wall of 

the Flexcon expansion vessel. 

When heated, the expansion 

vessel partially fills with water 

and the nitrogen volume is 

compressed. 

When heated further, the 

expansion vessel portion 

fully fills with water and the 

nitrogen volume is fully 

compressed. 

If the pressure rises too high, 

the Prescor valve opens. 

The excess water/steam is 

discharged. 



15

Unvented hot water systems 

Unvented hot water systems are gaining in popularity 

and market share every year in the UK. 

The advantages that these unvented systems offer 

over traditional, vented systems has led to unvented 

systems becoming the standard for supplying 

domestic hot water. 

Unvented systems have the following characteristics: 

• Pressure is applied directly by the incoming water 

supply. 

• Pressure reducing valve limits the system pressure 

to a safe level as well as providing back flow 

prevention. 

• A pressure and temperature relief valve provides 

protection against over-pressure and over-temperature. 

• Expansion is accommodated by an expansion 

vessel. 

Hot water and heating systems 

(domestic example) 

The advantages of unvented systems include: 

• Higher system pressure gives superior flow rates, 

improving the performance of taps and showers. 

• No header tank required. 

• Greater flexibility in system design. 

• Easy to install and maintain. 

• No risk of contamination. 



1 

Technical schematics 

Commercial examples 

44 

4 

MTHW MTHW System 

MTHW System 

77 

7 

44 44 

4 4 

66 

66 

6 6 

Boiler Boiler Boiler Boiler 

Boiler Boiler 

55 

5 

11 

1 

22 

2 

33 

3 

33 

3 

44 

4 

LTHW LTHW System 

LTHW System 

77 

7 

44 44 

4 4 

88 

8 

66 

66 

6 6 

Boiler Boiler Boiler Boiler 

Boiler Boiler 

11 

1 

22 

2 

33 

3 

33 

3 

44 

4 

Chilled System 

Chilled System 

10 10 

10 

44 44 

4 4 

99 66 55 

9 66 

6 5 

6 

Chiller Chiller Chiller Chiller 

Chiller Chiller 

11 

1 

22 

2 

33 

3 

33 

3 

1. Flexcon floor standing digital flexfiller. 

2. Flexcon Uni-fil filling set (must be disconnected after filling 

system). 

3. Flexcon expansion vessel sited on heating system return. 

4. Flexvent Super automatic air vent-mounted vertically where air 

naturally collects. 

5. VSV Vessel (intermediate for heating) or PS (buffer for chilled 

systems). 

6. Safety valve and tundish sited on top or above the Boiler or plant. 

7. Flamcovent clean deaerator - in flow from the boiler before 

the pump. 

8. Supastor indirect calorifier. 

9. PSD pressure step degasser. 

10. Flamco Clean separator with flanged connections 

NB Numbers 1 and 9 now available as a combined option 

(Flexfill Plus). 



17

Calculation of Flexcon expansion vessels 

Sizing Flexcon expansion vessels for domestic heating 

Calculations in accordance to B.S. 7074:1990 Code of Practice 

Maximum working pressure 

[bar(g)] 

Static head 

[m] 

Water content 

[l] 

Boiler rating 

kW 

BTU 

Vessel size 

[l] 

Pre-charge 

[bar(g)] 

Calculated 

system 

efficiency 

3 5 36 3 10,246 2 0.5 62.5% 

60 5 17,076 4 0.5 62.5% 

132 11 37,567 8 0.5 62.5% 

192 16 54,643 12 0.5 62.5% 

298 24 81,964 18 0.5 62.5% 

396 33 112,701 25 0.5 62.5% 

564 47 160,518 35 0.5 62.5% 

804 67 228,817 50 0.5 62.5% 

1,284 107 365,424 80 0.5 62.5% 

1,764 147 502,031 110 0.5 62.5% 

2,244 187 638,638 140 0.5 62.5% 

3,192 266 908,438 200 0.5 62.5% 

4,800 400 1,366,072 300 0.5 62.5% 

6,804 567 1,936,406 425 0.5 62.5% 

9,600 800 2,732,143 600 0.5 62.5% 

3 10 36 3 10,246 2 1.0 50.0% 

60 5 17,076 4 1.0 50.0% 

132 11 37,567 12 1.0 50.0% 

192 16 54,643 18 1.0 50.0% 

288 24 81,964 25 1.0 50.0% 

396 33 112,701 35 1.0 50.0% 

564 47 160,513 50 1.0 50.0% 

804 67 228,817 80 1.0 50.0% 

1,284 107 365,424 110 1.0 50.0% 

1,764 147 502,031 140 1.0 50.0% 

2,244 187 638,638 200 1.0 50.0% 

3,192 266 908,438 300 1.0 50.0% 

4,800 400 1,366,072 425 1.0 50.0% 

6,804 567 1,936,406 600 1.0 50.0% 

9,600 800 2,732,143 600 1.0 50.0% 

3 15 36 3 10,246 4 1.5 37.5% 

60 5 17,076 8 1.5 37.5% 

132 11 37,567 12 1.5 37.5% 

192 16 54,643 18 1.5 37.5% 

288 24 81,964 35 1.5 37.5% 

396 33 112,701 35 1.5 37.5% 

564 47 160,518 50 1.5 37.5% 

804 67 228,817 80 1.5 37.5% 

1,284 107 365,424 140 1.5 37.5% 

1,764 147 502,031 200 1.5 37.5% 

2,244 187 638,638 200 1.5 37.5% 

3,192 266 908,438 300 1.5 37.5% 

4,800 400 1,366,072 425 1.5 37.5% 

6,804 567 1,936,406 800 1.5 37.5% 

9,600 800 2,732,143 800 1.5 37.5% 

3 20 36 3 10,246 8 2.0 25.0% 

60 5 17,076 5 2.0 25.0% 

132 11 37,567 18 2.0 25.0% 

192 16 54,643 35 2.0 25.0% 

288 24 81,964 50 2.0 25.0% 

396 33 112,701 80 2.0 25.0% 

564 47 160,518 80 2.0 25.0% 

804 67 228,817 110 2.0 25.0% 

1,284 107 365,424 200 2.0 25.0% 

1,764 147 502,031 300 2.0 25.0% 

2,244 187 638,638 300 2.0 25.0% 

3,192 266 908,438 425 2.0 25.0% 

4,800 400 1,366,072 800 2.0 25.0% 

6,804 567 1,936,406 1,000 2.0 25.0% 

9,600 800 2,732,143 2 x 600 2.0 25.0% 



1 

Sizing Flexcon expansion vessels 

Static height is the vertical 

distance from the expansion 

vessel mid point (lower part 

of system) to the highest 

point of the system above 

the expansion vessel. 

Basic calculation 

system water content x coefficient of expansion 

Vessel size = ––––––––––––––––––––––––––––––––––––––––––––– 

expansion vessel efficiency 

Expansion vessel efficiency (VE) 

max. pressure - min. pressure 

VE = –––––––––––––––––––––––––––– 

max. pressure 

* Please note: Pressure must be in absolute units ( gauge pressure + 1 bar(g) ). 

Maximum pressure = maximum working pressure at the expansion vessel. 

Minimum pressure = expansion vessel gas charge (normally dependent on 

the system static height) + 0.2 bar(g) (0.7 bar(g) minimum). 

Maximum vessel efficiency 

Range Size Efficiency 

Flexcon 2 - 600 litres 0.625 (62.5%) 

Flexcon 800 litres 0.5 (50%) 

Flexcon 1,000 litres 0.4 (40%) 

Airfix P 2 - 500 litres 0.6 (60%) 

Airfix P 750 - 1,000 litres 0.5 (50%) 

Airfix DE 50 - 3,000 litres 0.6 (60%) 

* Please note: The expansion vessel efficiency 

must not exceed the maximum stated by 

Flamco UK Ltd. sizing charts have taken this 

into consideration. 

Example (basic sizing) 

System 

Water content = 1,000 litres 

Temperature = 82 °C. Maximum working pressure = 3 bar(g) 

Expansion vessel sizing (Gas charge 1 bar(g) ). 

4 - 2 

VE = ––––– = 0.5 (50%) Coefficient of expansion = 0.032 

4 

1,000 x 0.032 

Expansion vessel size = –––––––––––– = 64 litres. 

0.5 

Expansion coefficient 

Degrees centigrade [˚C] 

(Use the nearest higher 

size. e.g. Flexcon 80/1). 

Coefficient of expansion (water with no additives) 

Heating systems - Flexcon standard expansion vessels 

Sizing to B.S. 7074 heating and chilled water sealed systems up to 5 bar(g). 

Use the following criteria for calculations: 

Water content = system water content + 10%. 

Coefficient of expansion = use system highest temperature (not mean temp). 

Maximum pressure = safety valve setting - 10%. (e.g. for 3 bar(g) safety valve maximum pressure = 2.7 bar(g) ). 

Minimum pressure = expansion vessel gas charge. 

For elevated temperature systems it is necessary to ensure that the water at the highest point in the system does not flash to steam. 

An anti-Flash margin, usually 11 deg.C, should be added to the flow temperature. The corresponding vapour pressure for this 

temperature should then be added to the static height of the system. This new minimum pressure must be used for the expansion 

calculations and will protect the system in accordance with BS 7074 pt2. If in doubt please contact Flamco UK Ltd. for advice. 



19

Pre-set 

pressure 

Temperature increase 

Pre-set pressure 0.5 bar(g) 

• Increase in volume of water in % 

The table below shows data on the increase in 

volume of water in percentage points 

at increases in water temperature from 

10 °C to 110 °C. 

Volume increase 

10 - 25 °C 0.35% 

10 - 30 °C 0.43% 

10 - 35 °C 0.63% 

10 - 40 °C 0.75% 

10 - 45 °C 0.96% 

10 - 50 °C 1.18% 

10 - 55 °C 1.42% 

10 - 60 °C 1.68% 

10 - 70 °C 2.25% 

10 - 80 °C 2.89% 

10 - 90 °C 3.58% 

10 - 100 °C 4.34% 

10 - 110 °C 5.16% 

Pre-set pressure 1.0 bar(g) 

• Temperature in the Flexcon expansion vessel 

The maximum continuous temperature in the 

Flexcon expansion vessel is 70 °C. 

The minimum permitted temperature in the Flexcon 

expansion vessel is -10 °C. 

6 

5 

Volume increase [%] 

4 

3 

2 

1 

0 

10 20 30 40 50 60 70 80 90 100 110 120 

Temperature [°C] 

The graph shows the figures 

for other temperatures. 



1 

Vessel calculation for chilled systems 

Flexcon expansion vessels in chilled and 

air-conditioning systems 

Anti-freeze has an expansion coefficient 

that is much greater than that of water 

In a chilled system, Flexcon expansion vessels may 

have the following functions: 

• As the system cools, the volume of the cooling water 

shrinks. 

• If the system is turned off, the water can return to 

the ambient temperature, allowing it to expand. 

The vessel absorbs this expansion volume. 

All Flexcon expansion vessels can be used in systems 

in which glycol-based anti-freeze is added to the 

system water. 

The table below shows the increase in volume of 

various water/ethylene glycol mixing ratios. These are 

average values. 

Expansion coefficient of water with and without added anti-freeze 

Temperature 

Percentage of glycol 

[°C] 0% 10% 20% 30% 40% 50% 

10 0.04 0.35 0.67 0.89 1.31 1.63 

20 0.18 0.50 0.82 1.04 1.46 1.78 

30 0.43 0.75 1.07 1.29 1.71 2.03 

40 0.79 1.11 1.43 1.65 2.07 2.39 

50 1.21 1.53 1.85 2.07 2.49 2.81 

60 1.71 2.03 2.35 2.57 2.99 3.31 

70 2.25 2.60 2.92 3.14 3.56 3.88 

80 2.89 3.22 3.54 3.76 4.18 4.52 

90 3.58 3.91 4.23 4.45 4.87 5.19 

100 4.35 4.63 4.95 5.17 5.59 5.90 

7 

Calculation for a Flexcon vessel in a 

chilled system 

Volume increase [%] 

6 

5 

4 

3 

2 

52 vol.% [-40 °C] 

44 vol.% [-30 °C] 

39 vol.% [-25 °C] 

34 vol.% [-20 °C] 

28 vol.% [-15 °C] 

20 vol.% [-10 °C] 

1,31 

1 

0,78 

0,64 

0,44 

0,13 0,28 

0 

-40 -30 -20 -10 0 10 20 30 40 50 60 70 


0 vol.% = water 

The following data is important in calculating the 

required volume of Flexcon expansion vessel: 

• Volume of system water 

• Percentage of added anti-freeze 

• Lowest system temperature 

• Maximum system temperature 

(= highest ambient temperature). 

• Water - anti-freeze mix expansion (percentage). 

• Static height of the system above the vessel. 

• Maximum working pressure. 

The initial pressure of the expansion vessel is selected 

to match the static height of the system (above the 

expansion vessel). 

The temperature in the Flexcon expansion vessel must remain above -10 ºC. 

A buffer vessel or Flexcon intermediate expansion vessel may have to be fitted between the system and the 

Flexcon expansion vessel. 



21

Flexcon Top - 6.0 bar(g) 

Price band C 

For heating and chilled water installations. 

Flexcon Top diaphragm expansion vessels are made of top-quality steel and come with a high gloss epoxy coating. The rolling 

action of the Flexcon diaphragm provides the vessel with a longer life. Together with the clench ring this design offers a high 

quality and reliable product. All Flexcon vessels are BSI kitemarked to BS 4814. 

• Max. working pressure: 6.0 bar(g). 

• Max. vessel temperature (diaphragm): 70 °C. 

• Max. supply temperature (boiler): 90 °C. 

• Max. working temperature (design): 120 °C. 

Gas charge must be stated on order, e.g. Flexcon Top 8/05 = 8 litre vessel with 0.5 bar(g) gas charge. Gas charge will determine 

the maximum working pressure. Other gas charges supplied to suit. 

Flexcon Top 2 - 25 

Type 

Volume 

[l] 

Gas 

charge 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

6.0 bar(g) 

Order 

Code 

Flexcon 2 2 0.5 216 144 3 

/ 4" 1.7 120 FCST 002 

Flexcon 4 4 0.5 216 194 3 

/ 4" 2.1 90 FCST 004 

Flexcon 8 8 0.5 245 280 3 

/ 4" 3.2 77 FCST 008 

Flexcon 12 12 0.5 286 313 3 

/ 4" 4.5 60 FCST 012 

Flexcon 18 18 0.5 328 306 3 

/ 4" 5.7 24 FCST 018 

Flexcon 25 25 0.5 358 359 3 

/ 4" 7.3 18 FCST 025 

Nr. 0343 

Flexcon Top 35 - 80 

Type 

Volume 

[l] 

Gas 

charge 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

6.0 bar(g) 

Order 

Code 

Flexcon 35 35 1.5 396 416 3 

/ 4" 8.8 18 FCST 035 

Flexcon 50 50 1.5 437 473 3 

/ 4" 11.2 12 FCST 050 

Flexcon 80 80 1.5 519 540 1" 15.0 12 FCST 080 

Nr. 0343 



1 

Cubex 

Price band C 


Cubex diaphragm expansion vessels are made of top-quality steel and come with a high gloss epoxy coating. Together with the 

clench ring this design offers a high quality and reliable product. The rolling action of the diaphragm provides the vessel with a 

longer life. 




Gas charge must be stated on order, e.g. Cubex 8/05 = 8 litre vessel with 0.5 bar(g) gas charge. Gas charge will determine the 

maximum working pressure. Other gas charges supplied to suit. 

Cubex 8 - 35 - 3.0 bar(g) 


Type 

Volume 

[l] 

Gas 

charge 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

3.0 bar(g) 

Order 

Code 

Cubex 8 8 0.5 245 304 3 

/ 4" 2.2 60 RV CUBEX 08 

Cubex 12 12 0.5 286 336 3 

/ 4" 2.1 60 RV CUBEX 12 

Cubex 18 18 0.5 328 328 3 

/ 4" 3.7 30 RV CUBEX 18 

Cubex 25 25 0.5 358 380 3 

/ 4" 4.5 24 RV CUBEX 25 

Cubex 35 35 0.5 396 439 3 

/ 4" 5.4 24 RV CUBEX 35 

Nr. 0343 

Cubex 50 - 80 - 6.0 bar(g) 


Type 

Volume 

[l] 

Gas 

charge 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

6.0 bar(g) 

Order 

Code 

Cubex 50 50 1.0 437 495 3 

/ 4" 11.2 12 RV CUBEX 50 

Cubex 80 80 1.0 519 551 1" 15.0 12 RV CUBEX 80 

Nr. 0343 



23

Vesselpaks 

Vesselpak Type A 

A convenient package ensuring all the correct fittings are supplied with a Flexcon expansion 

vessel. 

This results in a compact and neat assembly for a domestic sealed system. Vesselpaks are sized 

in the same way as standard expansion vessels. 


Vesselpak A includes: 

Flexcon expansion vessel, 

vessel manifold, 

prescomano combined safety valve and pressure gauge, 

double check valve with test point, 

flexible braided hose with quick fit connections and 'O' ring seal, 

stop valve for connection to water mains, 

isolation valve, 

MB2 vessel mounting bracket with wall plugs and screws, 

end caps for fitting on the exposed ends of the flexible hose when it is removed. 

Larger Vesselpaks available on request, not including MB2 mounting bracket e.g. 35 and 50 litre. 

Gas charge must be stated on order, e.g. Flexcon 2/05 = 2 litre vessel with 0.5 bar(g) gas charge. 

Gas charge will determine the maximum working pressure. Other gas charges supplied to suit. 

Type 

Capacity 

[litres] 

Gas 

charge 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

(mm) 

Syst. 

conn. 

[mm] 

Dry 

weight 

[kg] 

6.0 bar(g) 

Order 

Code 

Vesselpak A 2 2 0.5 194 260 15 2.3 1 FC VESSPAK 2 



Vesselpak A 12 12 0.5 286 421 15 5.5 1 FC VESSPAK12 

Vesselpak A 12 12 1 286 421 15 5.5 1 FC VESSPAK12 





Nr. 0343 

Vesselpak Type B 

Vesselpak Type B is identical to Type A other than the safety valve is supplied separately to allow 

for remote installation. 

Larger Vesselpaks available on request, not including MB2 mounting bracket e.g. 35 and 50 litre. 

Gas charge must be stated on order, e.g. Flexcon 2/05 = 2 litre vessel with 0.5 bar(g) gas charge. 


Type 

Capacity 

[litres] 

Gas 

charge 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

(mm) 

Syst. 

conn. 

[mm] 

Dry 

weight 

[kg] 

6.0 bar(g) 

Order 

Code 

Vesselpak B 2 2 0.5 194 212 15 2.3 1 FC VESS B2 




Vesselpak B 12 12 1 286 373 15 5.5 1 FC VESS B12 





Nr. 0343 



1 

Cubexpak Type A 

A most convenient package ensuring all the correct fittings are supplied with a Cubex expansion 

vessel. This results in a compact and neat assembly for a domestic sealed system. Cubexpaks 

are sized in the same way as standard expansion vessels. 


Cubexpak A includes; 

Cubex expansion vessel, 

vessel manifold, 

prescomano combined safety valve and pressure gauge, 

double check valve with test point, 

flexible braided hose with quick fit connections and ‘O’ ring seal, 

stop valve for connection to water mains, 

isolation valve, 

MB2 vessel mounting bracket with wall plugs and screws, 

end caps for fitting on the exposed ends of the flexible hose when it is removed. 

Larger Cubexpaks available on request, not including MB2 mounting bracket e.g. 35, 50 and 80 

litre. 

Gas charge must be stated on order, e.g. Cubex 8/05 = 8 litre vessel with 0.5 bar(g) gas charge. 


Type 

Capacity 

[litres] 

Gas 

charge 

(bar(g)) 

Dimensions 

Ø 

[mm] 

H. 

(mm) 

Syst. 

conn. 

[mm] 

Dry 

weight 

[kg] 

3.0 bar(g) 

Order 

Code 

Cubexpak A 8 8 0.5 245 412 15 3.4 1 RV CUPAK 08 




Nr. 0343 

Cubexpak Type B 

Cubexpak B is identical to type A except for the safety valve being supplied separately to allow 

for remote installation. 

Larger Cubexpaks available on request, not including MB2 mounting bracket e.g. 35, 50 and 80 

litre. 

Gas charge must be stated on order, e.g. Cubex 8/05 = 8 litre vessel with 0.5 bar(g) gas charge. 


Type 

Capacity 

[litres] 

Gas 

charge 

(bar(g)) 

Dimensions 

Ø 

[mm] 

H. 

(mm) 

Syst. 

conn. 

[mm] 

Dry 

weight 

[kg] 

3.0 bar(g) 

Order 

Code 

Cubexpak B 8 8 0.5 245 364 15 3.4 1 RV CUPAK B08 




Nr. 0343 

Combi RepairKit 

An installation kit for the instant fitting of an expansion vessel to a sealed system. Consists of 

Flexcon expansion vessel, mounting bracket with fixings, vessel adaptor for hose, flexible hose 

and T-plus coupling for live connection. 


Type 

Volume 

[l] 

Gas 

charge 

[bar(g)] 

Syst. 

conn. 

[mm] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Dry 

weight 

[kg] 

6.0 bar(g) 

Order 

code 

Combi repairkit 8 0.5 15 245 280 4.9 1 FC CR 08 


Combi repairkit 12 0.5 22 286 313 6.3 1 FC CR 12A 


Combi repairkit 18 0.5 22 328 306 8.0 1 FC CR 18A 



25


For solar heating installations. 

Pressure expansion vessels for solar-powered units. 

Flexcon diaphragm solar expansion vessels are made of top-quality steel and come with a high gloss epoxy coating. 

Incorporating clench ring technology, this design offers a high quality and reliable product. The rolling action of the diaphragm 

provides the vessel with a longer life. 




• Standard gas charge: 2.5 bar(g). 

Flexcon Solar 8 - 25 

Type 

Volume Gas charge 

[l] [bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

8.0 bar(g) 

Order 

Code 

Flexcon Solar 8 8 2.5 245 280 3 

/ 4" 3.2 50 FC SOLAR 8 

Flexcon Solar 12 12 2.5 286 313 3 

/ 4" 4.3 36 FC SOLAR 12 

Flexcon Solar 18 18 2.5 328 306 3 

/ 4" 5.7 24 FC SOLAR 18 

Flexcon Solar 25 25 2.5 358 359 3 

/ 4" 7.3 18 FC SOLAR 25 

Nr. 0343 


Type 


[l] [bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

8.0 bar(g) 

Order 

Code 

Flexcon Solar 35 35 2.5 396 416 3 

/ 4" 8.8 18 FC SOLAR 35 

Flexcon Solar 50 50 2.5 437 473 3 

/ 4" 11.2 12 FC SOLAR 50 

Flexcon Solar 80 80 2.5 519 540 1" 15.0 12 FC SOLAR 80 

Nr. 0343 



1 

Flexcon 

Price band C 


Flexcon diaphragm expansion vessels are made of top-quality steel and come with a high gloss epoxy coating. The rolling 

action of the Flexcon diaphragm provides the vessel with a longer life. 




Gas charge must be stated on order, e.g. Flexcon 110/05 = 110 litre vessel with 0.5 bar(g) gas charge. Gas charge will 

determine the maximum working pressure. Other gas charges supplied to suit. 

Flexcon 110 - 1000 - 6.0 bar(g) 


Type 

Volume 

[l] 

Gas 

charge 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

6.0 bar(g) 

Order 

Code 

Flexcon 110 110 1.5 484 784 1" 23.8 8 FCST 110 

Flexcon 140 140 1.5 484 950 1" 25.3 8 FCST 140 

Flexcon 200 200 1.5 484 1300 1" 38.1 8 FCST 200 

Flexcon 300 300 1.5 600 1330 1" 56.9 6 FCST 300 

Flexcon 425 425 1.5 790 1180 1" 76.4 1 FCST 425 

Flexcon 600 600 1.5 790 1540 1" 92.9 1 FCST 600 

Flexcon 800 800 1.5 790 1888 1" 126.9 1 FCST 800 

Flexcon 1000 1000 1.5 790 2268 1" 145.9 1 FCST 1000 

Nr. 0343 

Flexcon 110 - 1000 - 10.0 bar(g) 


Type 

Volume 

[l] 

Gas 

charge 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

10.0 bar(g) 

Order 

Code 

Flexcon 110 110 1.5 484 784 1" 38.5 1 FCST 110 0 

Flexcon 140 140 1.5 484 950 1" 44.6 6 FCST 140 0 

Flexcon 200 200 1.5 600 960 1" 49.3 1 FCST 200 0 

Flexcon 300 300 1.5 600 1330 1" 73.7 1 FCST 300 0 

Flexcon 425 425 1.5 790 1180 1" 105.5 1 FCST 425 0 

Flexcon 600 600 1.5 790 1540 1" 132.0 1 FCST 600 0 

Flexcon 800 800 1.5 790 1888 1" 182.0 1 FCST 800 0 

Flexcon 1000 1000 1.5 790 2268 1" 210.0 1 FCST 1000 0 

Nr. 0343 



27

Flexcon M 

A Flexcon M expansion vessel offers you 

advantages in installations with big differences in 

the static pressure and set pressure 

of the safety valve. 

All Flexcon M expansion vessels are fitted with an 

exchangeable diaphragm. This diaphragm forms the 

separation between the expansion water inside the 

bladder and the nitrogen cushion. 

The Flexcon M’s flange 

construction allows you to 

replace the butyl-rubber 

diaphragm. 

High efficiency means that 

the capacity of the vessel is 

used to best effect. 

As an option, the 

Flexcon M expansion 

vessel can be fitted 

with a Flexvent Super 

floatvent. 

Each Flexcon M expansion 

vessel is fitted with a 

pressure gauge as standard. 

From 2,800 litres all 

Flexcon M expansion 

vessels are fitted with 

an adjustable foot. 

FLEXCON M 

Systems with more than one boiler: 

1. Flexcon expansion vessel (depending on boiler capacity). 

2. Prescor safety valve or Prescomano. 

3. Flamco tundish. 

4. Flexcon Connection assembly ½". 

5. Flexcon pressure gauge or combined pressure gauge/thermometer. 

6. Flamco Venting equipment. 

7. One or more Flexcon M vessels. 

8. Flamco pressurisation unit. 



1 

Flexcon M 

Price band D 

Larger expansion vessels with exchangeable diaphragm for heating and chilled water installations. 

• All Flexcon M vessels have a flange construction. 

• The flange construction enables the butyl rubber diaphragm to be exchanged if necessary. 

• Complete with inspection cover and pressure gauge. 

• Special versions of the Flexcon M expansion vessel e.g horizontal are available on request. 




Gas charge must be stated on order, e.g. Flexcon M 80/05 = 80 litre vessel with 0.5 bar(g) gas charge. Gas charge will 

determine the maximum working pressure. Other gas charges supplied to suit. 

Flexcon M 80 - 8000 - 6.0 bar(g) 


Type 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP (M) 

Weight 

[kg] 

6.0 bar(g) 

Order 

Code 

Flexcon M 80 80 450 770 1" 40 1 FC M 080 

Flexcon M 400 400 750 1335 1 1 / 4" 115 1 FC M 400 

Flexcon M 600 600 750 1755 1 1 / 4" 145 1 FC M 600 

Flexcon M 800 800 750 2155 1 1 / 4" 180 1 FC M 800 

Flexcon M 1000 1000 750 2710 1 1 / 2" 215 1 FC M 1000 

Flexcon M 1000 1000 1000 1690 1 1 / 2" 260 1 22115 

Flexcon M 1200 1200 1000 1940 1 1 / 2" 285 1 FC M 1200 

Flexcon M 1600 1600 1000 2440 1 1 / 2" 340 1 FC M 1600 

Flexcon M 2000 2000 1200 2180 2" 425 1 FC M 2000 

Flexcon M 2800 2800 1200 2800 2 1 / 2" 510 1 FC M 2800 

Flexcon M 3500 3500 1200 3600 2 1 / 2" 620 1 FC M 3500 

Flexcon M 5200 5200 1500 3420 2 1 / 2" 1050 1 FC M 5200 

Flexcon M 6700 6700 1500 4310 DN 100* 1200 1 FC M 6700 

Flexcon M 8000 8000 1500 5090 DN 100* 1410 1 FC M 8000 

* Flanges as per EN 1092-1 PN 16. 

Flexcon M 80 - 8000 - 10.0 bar(g) 


Type 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP (M) 

Dry 

Weight 

[kg] 

10.0 bar(g) 

Order 

Code 

Flexcon M 80 80 550 770 1" 40 1 FC M 080I 

Flexcon M 400 400 750 1335 1 1 / 4" 160 1 FC M 400I 

Flexcon M 600 600 750 1755 1 1 / 4" 200 1 FC M 600 1 

Flexcon M 800 800 750 2155 1 1 / 4" 250 1 FC M 800I 

Flexcon M 1000 1000 750 2710 1 1 / 2" 300 1 FC M 1000I 

Flexcon M 1000 1000 1000 1690 1 1 / 2" 385 1 22155 

Flexcon M 1200 1200 1000 1940 1 1 / 2" 410 1 FC M 1200I 

Flexcon M 1600 1600 1000 2440 1 1 / 2" 485 1 FC M 1600I 

Flexcon M 2000 2000 1200 2180 2" 600 1 FC M 2000I 

Flexcon M 2800 2800 1200 2780 2 1 / 2" 725 1 FC M 2800I 

Flexcon M 3500 3500 1200 3580 2 1 / 2" 900 1 FC M 3500I 

Flexcon M 5200 5200 1500 3600 2 1 / 2" 1330 1 FC M 5200I 

Flexcon M 6700 6700 1500 4480 DN 100* 1690 1 FC M 6700I 

Flexcon M 8000 8000 1500 5090 DN 100* 2140 1 FC M 8000I 

* Flanges as per EN 1092-1 PN 16. 



29

Flexcon VSV intermediate vessels 

In sealed heating systems, the supply temperature can 

reach 120 °C. 

The continuous temperature load on the diaphragm in 

the Flexcon vessels is max. 70 °C in compliance with 

the appropriate standard. That is why Flexcon 

expansion vessels must be fitted in the return line. 

If the temperature in the return line is not capped at 

70 °C, an intermediate vessel must be fitted. 

In this intermediate vessel the expansion water is 

System water flows from 

the installation into the top 

of the intermediate vessel. 

The hot water mixes in the 

vessel with the cold water 

already in the vessel. 

From the bottom of the 

vessel, significantly cooler 

water is fed into the 

expansion vessel. 

The temperature of the 

expansion water that is 

supplied to the Flexcon 

expansion tank remains 

under the maximum 

temperature permissible 

for the membrane. 

allowed to cool. 

The maximum supply temperature of the water for 

Flexcon VSV vessels is 160 °C. The extent to which 

the expansion water is cooled depends on the volume 

of the intermediate vessel. 

An intermediate vessel must not be insulated. 

Around the vessel and between the vessel and the 

ceiling there must be clearance of at least 400 mm. 

Calculation for a Flexcon VSV intermediate vessel 

The required volume of a Flexcon VSV intermediate 

vessel depends on the supply temperature and a 

percentage of the net expansion volume as per the 

table below. 

Supply temperature 

Flexcon intermediate vessel volume 

% of the net expansion volume 

90 - 110 °C 15 

111 - 125 °C 25 

126 - 140 °C 40 

141 - 150 °C 60 

Example calculation for a Flexcon intermediate 

vessel 

Data: 

- expansion volume = 1.740 litres 

- supply temperature (105/95 °C) = 105 °C 

Calculation: 

Required vessel volume = 15% of the expansion 

volume 

15x1.740 

= ––––––––– = 261 litres 

100 

The ideal intermediate vessel is thus the Flexcon 

VSV 350. 

Flexcon intermediate vessel connection diagram 

The intermediate vessel functions according to the 

principle that hot water is lighter than cold water. 

As the intermediate vessel is filled with water from the 

top, the heat will be concentrated there. 

System water that has been allowed to cool will, 

due to its greater density, fall and this cooler water will 

naturally be forced towards the connection on the 

underside of the expansion vessel. 

(Automatic) 

vent 

FLEXCON VSV 

Drain 

expansion 

line 



1 


Price band D 

Vessels to protect Flexcon expansion vessels on elevated temperature systems. The vessels are fitted in between the expansion 

vessel and the system return. 

The system connection is at the top of the vessel with the expansion vessel connected to the bottom. 

Flexcon VSV - 6.0 bar(g) 


• Max. supply temperature (design): 160 °C. 

Type 

Volume 

[l] 

Dimensions Conn. BSP Dry 

Ø 

[mm] 

H. 

[mm] 

Vessel 

(F) 

System 

(F) 

weight 

[kg] 

Order 

Code 

Flexcon VSV 50 50 484 600 1 1 / 2" 1 1 / 2" 25 1 FCVSV 50 




Flexcon VSV 500 500 600 2025 2" 2" 64 1 FCVSV 500 



Nr. 0343 

Flexcon VSV - 10.0 bar(g) 


• Max. supply temperature (design): 160 °C. 

Type 

Volume 

[l] 

Dimensions Conn. BSP Dry 

Ø 

[mm] 

H. 

[mm] 

Vessel 

(F) 

System 

(F) 

weight 

[kg] 

Order 

Code 

Flexcon VSV 50 50 484 600 1 1 / 2" 1 1 / 2" 25 1 FCVSV 50 10B 




Flexcon VSV 500 500 600 2025 2" 2" 96 1 FCVSV 500 10B 



Nr. 0343 



31

Pressurisation 

equipment 

For large or tall sealed systems traditional expansion vessels are not 

always the most efficient solution in terms of operational pressure or 

physical footprint. Flamco Expansion systems balance the system 

pressure, using a highly efficient vessel design and control equipment. 

We produce a comprehensive range of models that offer high-quality 

performance and versatility which may be further enhanced by the 

addition of numerous optional accessories. Flamco has an adaptable, 

modular range to suit every requirement. 



2 



Packaged sealed system sets 

Flexfiller Mini 

• Compact, fully-integrated topping-up 

and filling unit. 


• One pump. 

Presspak 

• Digital Packaged Sealed System Set. 

• Presspak pressurisation unit, 

Flexcon expansion vessel(s) and 

connecting hose kit included. 

• One pump. 

Flexfiller Midi 

• Compact, fully-integrated wall 

mounted topping-up and filling unit. 

• Max. operating pressure: 2.7 / 8 

bar(g). 

• One or two pumps. 

Basepak 

• Skid Mounted Packaged Sealed 

System Set. 

• Flexfiller pressurisation unit, Flexcon 

expansion vessel and connecting 

hose kit included. 

• One pump. 

Flexfiller Standard 

• Compact, fully-integrated free 

standing topping-up and filling unit. 


bar(g). 

• One or two pumps. 

Flexconpak 

• Cabinet Housed Packaged Sealed 

System Set. 

• Pressurisation unit and Flexcon 

expansion vessel included (integral). 

• One pump. 

Flexfiller Twin System 


and filling unit for two systems. 


bar(g). 

• One pump for each system. 

Flexfiller Glycol 


and filling unit. 

• Two tanks: a water tank and a 

glycol tank. Glycol is introduced on 

demand 


bar(g). 

• Two pumps. 

Flexfill Plus 

• Compact, fully-integrated unit for 

pressurisation and Pressure Step 

Degassing. 

• Two microprocessors for 

independant control. 


• Two pumps. 



33

Flamco pressurisation equipment 

Compact wall mounted and free standing 

pressurisation units, utilising micro-processor 

control. For use on sealed heating and cooling 

systems, offering accurate control and reliability. 

Digital pressurisation equipment including: 

• Digital equipment comes with bright LED display 

scrolling messages including pump operation and 

alarm modes. 

• Single or twin pump configurations. 

• Complete with integral water break tank utilising an 

AB airgap and a WRAS approved float valve. 

• Twin pump equipment operates as cyclic duty - 

standby with automatic changeover. 

• Internal alarm with mute function. 

• Security password protected. 

• Auto resetting low water detection, for pump protection. 

• Auto resetting high and low pressure alarm. 

• Digital pressure setpoint with adjustable differential. 

• Flood protection through a pump run limit timer. 

• Normally closed, common fault, volt free contact 

(Boiler interlock). 

• Normally open, individual volt free contacts for pump 

trip, high pressure, low pressure and sensor health. 

• All volt free contacts are for use with electrical 

supplies up to 240v with a maximum current draw of 

5 amps. 

• RS 485 Connectivity. 

• Hours run counter (per pump). 

• 12 month service reminder. 

• Excessive start alarm (>3 times in 8 hours). 

• Pump pulse option (2 second pulse per pump if 

inactive for 60 days). 

• Fill system option (Not available on 130D/230D). 

Flexconpak (cabinet housed) and Basepak (baseplate 

mounted) packaged sealed system units, Presspak 

packaged sealed system units and floorstanding 

pressurisation units are available with a range of 

options to suit your specific requirements. 

For full details please contact our Sales Office. 

Selection guide Digital Pressurisation Units 

Delivery pressure [bar(g)] 


Flow rate [l/min] 












2 


Price band C 

Flexfiller Selection Guide 

Ref Description Automatic 

pump 

change-over 

130D 

230D 

125D 

150D 

225D 

250D 

280D 

Mini digital 

pressurisation unit 

Twin pump mini digital 


Digital 25m head 


Digital 50m head 


Twin pump digital 25m 

head pressurisation unit 





*HL switch kits available on request. 

*Mechanical Presspaks available on request. 

Nr. of 

pumps 

Top up 

flow rate 

(po. max.) 

[ l/min.] 

Maximum 

output 

pressure 

[bar(g)] 

Minimum 

output 

pressure 

[bar(g)] 

Full load 

current 

[A] 

Digital 

H / L 

switches 

Digital 

system 

diagnostic 

- 1 0.4 3.0 0.5 3.0 4 4 

4 2 0.4 3.0 0.5 3.0 4 4 

- 1 10 2.5 0.5 5.0 4 4 

- 1 6.5 5.0 5.0 5.0 4 4 

4 2 10 2.5 2.5 3.2 4 4 

4 2 6.5 5.0 5.0 3.2 4 4 

4 2 30 9.0 5.0 6.7 4 4 

Flexfill Plus 

Compact, totally enclosed combined digital pressurisation unit with vacuum degasser for use on sealed systems in order to 

provide a minimum system pressure requirement and effective dissolved gas removal. 

• System quick-fill mode. 

• Password protection for parameter entry. 

• Pressure settings in 0.1 bar(g) increments. 

• Electric pump, 230v 50Hz, single phase. 

• Service reminder option (12 months). 

• Pump pulse option (2 second pulse if inactive for 60 days). 

• Flood protection options. 

• Event logging for pump start, individual pump run hours counter, electrical interruption and common alarm. 

• Volt free contacts for common fault, high pressure, low pressure, pump fault, pressure transducer. 

• Vacuum degassing, turbo and normal interval modes. 

• Max. working pressure: 10 bar(g). 

Type 

Working 

pressure 

range 

[bar(g)] 

W. 

[mm] 

Dimensions Connections Order 

Code 

D. H. System Mains Overflow 

[mm] [mm] [mm] supply [mm] 

[mm] 

Flexfill Plus 250 D 1.0 - 6.0 480 330 1160 2 x15 ( 1 / 2") 15 ( 1 / 2") 22 1 FC FILL PLUS 250 

Flexfill Plus 280 DS 1.0 - 8.0 600 330 1160 2 x15 ( 1 / 2") 15 ( 1 / 2") 22 1 FC FILL PLUS 280 



35

MidiFill Plus 

Compact, totally enclosedwall mounted combined digital unit with vacuum degasser for use on sealed systems in order to 

provide a minimum system requirement and effective dissolved gas removal. 









• Volt free contacts for common fault, high pressure, low pressure, pump fault, pressure transducer. 

• Vacuum degassing, turbo and normal interval modes. 


Type 

Working 

pressure 

range 

[bar(g)] 

W. 

[mm] 

Dimensions Connections Order 

Code 

D. H. System Mains Overflow 

[mm] [mm] [mm] supply [mm] 

[mm] 

MidiFill Plus 150 D 1.0 - 5.0 410 290 485 2 x15 ( 1 / 2") 15 ( 1 / 2") 22 1 FC FILL MIDIPLUS 

Technical specifications Flexfill Plus & Midifill Plus 

Technical MidiFill Plus 150 D Flexfill Plus 250 D Flexfill Plus 280 DS 

Maximum system volume 50,000 litres 300,000 litres 300,000 litres 

Working pressure range 1.0 - 5.0 bar(g) 1.0 - 6.0 bar(g) 1.0 - 8.0 bar(g) 

Break tank capacity 18 litres 18 litres 18 litres 

Max. delivery pressure 5.0 bar(g) (Cold fill) 6.0 bar(g) (Cold fill) 8.0 bar(g) (Cold fill) 

System temperature range 0 - 90 °C 0 - 90 °C 0 - 90 °C 

Ambient temperature range 0 - 45 °C 0 - 45 °C 0 - 45 °C 

Noise rating Approx. 75 dB(A) Approx. 75 dB(A) Approx. 75 dB(A) 

Electrical requirements 1 x 230 V / 50 Hz 1 x 230 V / 50 Hz 1 x 230 V / 50 Hz 

Full load current 3.4 Amps 2 x 3.4 Amps 2 x 5.6 Amps 

Power used 0.5 kW 2 x 0.5 kW 2 x 0.75 kW 

Fuse rating 13 Amps 13 Amps 13 Amps 

Safety rating IP 54 IP 54 IP 54 

Maximum turbo runtime 168 hours (1 week) 168 hours (1 week) 168 hours (1 week) 

Maximum normal downtime 180 minutes (3 hours) 180 minutes (3 hours) 180 minutes (3 hours) 

Volt free contacts Common fault contact Common fault contact Common fault contact 

Flexfiller Digital Glycol Pressurisation 

Compact, totally enclosed unit with user-friendly microprocessor for use with Flexcon expansion vessels in order to provide 

a minimum system pressure requirement. The processor allows for low and high pressure monitoring as well as system 

diagnostic tools. Glycol is introduced on demand from a dedicated Glycol storage tank. 


• Manual mix options set on site up to 50%. 








• Volt free contacts for common fault, high pressure, low pressure, pump fault, pressure transducer fault. 


Type 

Max. 

delivery 

pressure 

[bar(g)] 

W. 

[mm] 

Dimensions Connections Dry 

D. 

[mm] 

H. 

[mm] 

System 

[mm] 

Mains 

Supply 

[mm] 

Flexfiller Glycol 225 D VBV 2.5 680 680 1200 15 ( 1 / 2") 15 ( 1 / 2") 22 80 1 FC Glycol 225D-VBV 

Flexfiller Glycol 250 D VBV 5.0 680 680 1200 15 ( 1 / 2") 15 ( 1 / 2") 22 80 1 FC Glycol 250D-VBV 

Drain 

[mm] 

weight 

[kg] 

Order 

Code 



2 

Flexfiller Mini 

Mini Pressurisation Unit for use on heating systems utilising a 300 litre expansion vessel or less, 

or chilled systems utilising a 50 litre expansion vessel or less. 

Type 

Pump 

quantity 

W. 

[mm] 

Dimensions 

D. 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

Order 

Code 

Flexfiller Mini 130 D 1 245 155 485 1 

/ 4" 6 1 FC FILL 130 D 

Flexfiller Mini 230 D 2 245 155 485 1 

/ 4" 6.2 1 FC FILL 230 D 

Flexfiller Midi 

Wall mounted pressurisation unit, single pump configuration. 

Type 

Pump 

quantity 

W. 

[mm] 

Dimensions 

D. 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(F) 

Dry 

weight 

[kg] 

Order 

Code 

Flexfiller Midi 125 D 1 245 245 485 1 

/ 2" 13.5 1 FC FILL 125 D 


/ 2" 14 1 FC FILL 150 D 


/ 2" 16 1 FC FILL 225 D 


/ 2" 16 1 FC FILL 250 D 

Flexfiller Standard 

Free standing pressurisation unit. 

Type 

Pump 

quantity 

W. 

[mm] 

Dimensions 

D. 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

Order 

Code 

Flexfiller 125 D 1 470 320 800 1 

/ 2" 28 1 FC FILL 125 D 

Flexfiller 150 D 1 470 320 800 1 

/ 2" 28 1 FC FILL 150 D 

Flexfiller 225 D 2 470 320 800 1 

/ 2" 30 1 FC FILL 225 D 

Flexfiller 250 D 2 470 320 800 1 

/ 2" 40 1 FC FILL 250 D 

Flexfiller 280 DS 2 470 230 800 1 

/ 2" 42 1 FC FILL 280 DS 

Flexfiller 2100 D 2 680 730 1590 1 

/ 2" 170 1 FC FILL 2100 D 

Flexfiller Twin System 

Compact, totally enclosed units with user-friendly microprocessor for use with Flexcon expansion 

vessels in order to provide a minimum system pressure requirement. The processor allows for low 

and high pressure monitoring as well as system diagnostic tools. 

Type 

Pump 

quantity 

W. 

[mm] 

Dimensions 

D. 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

Order 

Code 

Twinsystem 2 x 125 D 2 * 470 320 800 1 

/ 2" 35 1 FC FILL 125 D 

Twinsystem 2 x 150 D 2 * 470 320 800 1 

/ 2" 40 1 FC FILL 150 D 

Twinsystem 2 x 180 DS 2 * 470 230 800 1 

/ 2" 42 1 FC FILL 280 DS 

* 1 pump for each system. 



37

Flexcon packaged sealed system units and sets 

Price Band C 

Presspak Digital Packaged Sealed System Sets 

Sealed system package which comprises of a Flexcon expansion vessel(s), a Presspak 

pressurisation unit and a connecting hose kit. 

• Pump quantity: 1 * 

Type 

Capacity 

[l] 

W. 

[mm] 

Dimensions ** 

D. 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP (M) 

Dry 

Weight 

[kg] 

Order 

Code 

*** 

Presspak 35 - 125 525 680 800 1 

/ 2" 32 1 FC PP 35 125D 

Presspak 50 - 125 525 680 800 1 

/ 2" 40 1 FC PP 50 125D 

Presspak 80 - 125 525 680 800 1 

/ 2" 45 1 FC PP 80 125D 

Presspak 110 - 125 525 784 800 1 

/ 2" 64 1 FC PP 110 125D 

Presspak 140 - 125 525 950 950 1 

/ 2" 70 1 FC PP 140 125D 

Presspak 200 - 125 600 960 1300 1 

/ 2" 67 1 FC PP 200 125D 

Presspak 300 - 125 600 1330 1330 1 

/ 2" 82 1 FC PP 300 125D 

Presspak 425 - 125 790 1180 1180 1 

/ 2" 101 1 FC PP 425 125D 

Presspak 600 - 125 790 1510 1540 1 

/ 2" 118 1 FC PP 600 125D 

Presspak 800 - 125 790 1890 1888 1 

/ 2" 162 1 FC PP 800 125D 

Presspak 1000 - 125 790 2270 2268 1 

/ 2" 171 1 FC PP 1000 125D 

Presspak 2 x 600 - 125 790 1510 1540 1 

/ 2" 211 1 FC PP 2x600 D 

Presspak 2 x 800 - 125 790 1890 1888 1 

/ 2" 299 1 FC PP 2x800 D 

Presspak 2 x 1000 - 125 790 2270 2268 1 

/ 2" 317 1 FC PP 2x1000 D 

* High head and twin pump sets available on request. 

** With and depth variable. 

***Quote gas charge when ordering. 

Basepak Expansion Equipment 

Skid Mounted Flexfiller Pressurisation Unit complete with Flexcon Expansion Vessel. 


Type 

Capacity 

[l] 

W. 

[mm] 

Dimensions 

D. 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP (M) 

Dry 

Weight 

[kg] 

Order 

Code 

** 

Basepak 50 - 125 D 600 940 950 1 

/ 2" 46 1 FCBP 50/125 D1 

Basepak 80 - 125 D 600 940 950 1 

/ 2" 75 1 FCBP 80/125 D1 

Basepak 110 - 125 D 600 940 950 1 

/ 2" 90 1 FCBP 110/125 D1 

Basepak 140 - 125 D 600 940 1100 1 

/ 2" 98 1 FCBP 140/125 D1 

Basepak 200 - 125 D 600 940 1450 1 

/ 2" 105 1 FCBP 200/125 D1 

Basepak 300 - 125 D 600 940 1480 1 

/ 2" 135 1 FCBP 300/125 D1 

Basepak 425 - 125 D 800 1330 1170 1 

/ 2" 155 1 FCBP 425/125 D1 

Basepak 600 - 125 D 800 1690 1170 1 

/ 2" 190 1 FCBP 600/125 D1 

Basepak 800 - 125 D 800 2038 1170 1 

/ 2" 225 1 FCBP 800/125 D1 

Basepak 1000 - 125 D 800 2418 1170 1 

/ 2" 245 1 FCBP 1000/125 D1 

Basepak 2 x 600 - 125 D 800 1690 2000 1 

/ 2" 323 1 FCBP 2X600/125 D1 

Basepak 2 x 800 - 125 D 800 2038 2000 1 

/ 2" 391 1 FCBP 2X800/125 D1 

Basepak 2 x 1000 - 125 D 800 2418 2000 1 

/ 2" 431 1 FCBP 2X1000/125 D1 

* High head and/or twin pumpsets available on request. 

** Quote gas charge when ordering. 

Flexconpak Expansion Equipment 

Cabinet Housed Pressurisation Equipment with integral Flexcon Expansion Vessel. 


Type 

Capacity 

[l] 

W. 

[mm] 

Dimensions 

D. 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP (M) 

Dry 

Weight 

[kg] 

Order 

Code 

** 

Flexconpak 25 - 125 D 680 730 1200 1 

/ 2" 84 1 FCPA 25/125 D1 

Flexconpak 35 - 125 D 680 730 1200 1 

/ 2" 86 1 FCPA 35/125 D1 

Flexconpak 50 - 125 D 680 730 1200 1 

/ 2" 90 1 FCPA 50/125 D1 

Flexconpak 80 - 125 D 680 730 1200 1 

/ 2" 95 1 FCPA 80/125 D1 

Flexconpak 110 - 125 D 680 730 1590 1 

/ 2" 114 1 FCPA 110/125 D1 

Flexconpak 140 - 125 D 680 730 1590 1 

/ 2" 118 1 FCPA 140/125 D1 

Flexconpak 200 - 125 D 680 730 1970 1 

/ 2" 138 1 FCPA 200/125 D1 

Flexconpak 300 - 125 D 730 780 1970 1 

/ 2" 170 1 FCPA 300/125 D1 

Flexconpak 425 - 125 D 940 990 1800 1 

/ 2" 215 1 FCPA 425/125 D1 

Flexconpak 600 - 125 D 940 990 2290 1 

/ 2" 258 1 FCPA 600/125 D1 

* High head and/or twin pumpsets available on request. 

** Quote gas charge when ordering. 



2 



39

Tomorrow's technology in today's Flamcomat 

The Flamcomat is a modern, pump-driven 

pressurisation unit. Important functions are 

integrated into one compact unit. 

The Flamcomat consists of a pump unit and a 

pressureless vessel. This modular expansion system 

can be expanded with additional vessels and 

accessories from our comprehensive range. In this 

way we can tailor your equipment precisely to the 

needs of your system. 

Steel vessel at atmospheric pressure. 

Flexvent Super floatvent 

with aer-intake preventor. 

Touch pad control panel. 

Flexible hoses. 

Twin pump configuration. 

Lockshield ball valves with drain. 

FLAMCOMAT 

Benefits to you 

• The Flamcomat combines pressure-control unit, 

dynamic de-aeration and topping-up all in one. 

• Choice of a range of pump modules. 

• Proven de-aeration results, as tested independently 

by WL / Delft Hydraulics. 

• Expansion fluid is stored at atmospheric pressure in 

a removable butyl-rubber bladder. 



2 

The Flamcomat is suitable for any size heating 

installation and for both refrigeration and airconditioning 

installations. The Flamcomat makes sure 

that the system pressure remains within precise limits 

and that the system is topped-up automatically should 

there be any requirements. 

The venting process is incorporated, dynamic and 

energy-efficient. 

Removable diaphragm of 

high-quality butyl-rubber. 

Gas-rich water 

from the system. 

De-aerated water 

to the system. 

PALL RINGS 

FLAMCOMAT VESSEL 

Active de-aeration 

By using an integrated PALL ring box it is possible 

to de-aerate the installation continuously and 

completely. 

The ‘Turbo-vent’ function significantly increases 

the de-aeration capacity. 



41

The Flamcomat is a versatile expansion equipment 

with high technical performance. The de-aeration 

capacity is not dependent on the circulation speed or 

the pressure in the system In systems with a large 

difference between summer and winter operation, we 

recommend using a Flamcomat. 

Pump discharge line, from expansion automat 

to the system. 

Pressure sensor. 

Solenoid valve, expansion relief. 

Safety valve. 

Top up connection. 

Example installation of Flamcomat 

with double pump control unit 

Automatic 

floatvent with 

aeration arrestor * 

Control unit * 

Configuration of Flamcomat with double 

pump, basic and additional vessels and 

intermediate vessel. 

Supply temperature < 120 °C 

Heat source 1 Heat source 2 

* = Supplied as standard 

** = Accessories 

E 

}*** = Stopcock, additional accessories 

or in combination with special model 

Vessel connection ** 

Additional vessel ** 

Basic vessel * 

}*** 

Basic vessel connection set * 

Connection from additional vessel - pump 

Top-up line 

for mains water 

Connection from additional vessel - valve 

1) 

M1 M2 M1 V2 M3 M/A 

RS485 

∑ error 

AI 

AP 

MDB 

F/A 

Stopcock ** 

Stopcock ** 

Return temperature < 70 °C 

Expansion line, discharge side 

Stopcock ** 

Expansion line, inlet side 

2) 

Voorschakelvat ** 

Minimum pressure limiter ** 

230V50Hz L N PE 

RS 485 data output 

Error log sensor 

Top-up 

Capacity, analogue 

Pressure, analogue 

Diaphragm-rupture sensor 

Level sensor 

1) Additional vessel(s) connection must have the same pipeline diameter 

and vessels must be configured symmetrically. 

2) Use if return temperature > 70 °C. 

Stopcock ** 


ar 

bar 


2 

How the automat works 

5. Topping-up 

If the water level in the vessel 

drops to a critical level, an 

appropriate amount of water will 

be carefully pumped into the 

system from the water mains. 

This water will be de-aerated (by 

pressure loss and the PALL rings), 

before entering the vessel. 

1. Cold 

The automat contains a small 

amount of water. The automat 

is still at rest. 

2. Warming up 

The volume of water, and the 

system pressure, increases. The 

unit responds to this by opening 

the solenoïd valve. Water flows 

into the pressureless vessel. The 

water in the vessel is de-aerated 

due to both the drop in pressure 

and the presence of the PALL rings. 

4. Cooling down 

The volume of water, and 

the system pressure, decreases. 

The de-aerated 

water is pumped from the 

pressureless vessel back 

into the system. This 

restores the system 

pressure. 

1 2 

0 3 

3. Full power 

When the system has warmed up 

completely, the vessel will be 

almost full to capacity. 

2 

1 3 

70 °C 



43

Calculation for expansion equipment 

Basic concepts for the calculation of 

expansion equipment 

To select the right expansion appliance, it is necessary 

to understand the following principles: 

• Static height 

This is the height of the system, between the 

connection of the Flexcon expansion equipment and 

the highest point, measured in water column metres 

(1 wcm = 0.1 barg). 

• System water capacity 

If unknown it is based on 12 l/kW. 

• Increase in water volume (in %) 

The table below shows data on the water volume 

increase in percentage points when the temperature 

of the water increases by between 10 °C and 

110 °C. 

• Expansion volume 

The expansion volume is determined in the following 

way: expansion volume = capacity x increase in 

volume at the average heating temperature. 

Example: heating temperature 90/70 °C 

(average 80 °C) = 2.89%. 

• Power capacity 

This is the sum of the nominal capacity [kW]. 

• Capacity of the Flamcomat pump expansion 

appliance 

The capacity of a pump expansion appliance is 

determined in the following way: 

capacity of expansion appliance = expansion 

volume / 0.8. 

The factor of 0.8 is based on the following 

assumptions: 

• The working capacity of the vessel allows for 

switching and differentiation. 

• Corrections to tolerances which, according to 

various standards, are admissible for parts of the 

system. 

Note: different selection values apply to cooling systems. 

Should you have any questions, please contact Flamco directly. 

Increase in temperature 

[°C] 

Increase in volume 

[%] 

10 - 25 0,35 

10 - 30 0,43 

10 - 35 0,63 

10 - 40 0,75 

10 - 45 0,96 

10 - 50 1,18 

10 - 55 1,42 

10 - 60 1,68 

10 - 70 2,25 

10 - 80 2,89 

10 - 90 3,58 

10 - 100 4,34 

10 - 110 5,16 

Increase in volume [%] 

6 

5 

4 

3 

2 

1 

0 

10 20 30 40 50 60 70 80 90 100 110 120 




2 

Flamcomat pump curves 

Flamcomat selection graph. Typical heating installation (nominal characteristics) 



45

Example calculations for expansion equipment 

Example 1 

Data 

- power capacity = 1500 kW 

- average heating temperature (90/70ºC) = 80ºC 

- static height = 20 metres 

- capacity = 15,400 litres 

- provision for expansion (vessel) situated at the bottom of the system. 

Calculation of vessel capacity 

Increase in volume in % = 2.89% ≈ 2.9% 

15,400 x 2.9 

Expansion volume = ––––––––––– 

100 

= 447 litres 

Required expansion reservoir capacity = 447 : 0.8 

Your choice 

= 558.8 litres 

Flamcomat GB 600. 

Calculation - control unit with pump. 

Nominal operating pressure = 2 + 0.5 = 2.5 bar(g). 

The 1.5 MW - 2.5 barg point is under the D0 pump curve 

(see Flamcomat pump characteristics graph). 

Selected: Flamcomat GB 600/D0. 

Example 2 

Data 


- average heating temperature (70/40ºC) = 55ºC 

- static height = 37 metres 

- capacity = unknown 

- provision for expansion (vessel) situated at the bottom of the system. 

- system components: mixed utility 


System capacity calculation = 7000 x 10 

= 70,000 litres 

Increase in volume in % = 1.42% 

7,000 x 1.42 

Expansion volume = ––––––––––– 

100 


= 994 litres 

= 1,242.5 litres 



2 

Your choice 



Nominal operating pressure = 3.7 + 0.5 = 4.2 barg. 

The 7 MW - 4.2 barg point is on the D 2 group curve 



Example 3 

Data 


- system capacity = 95,000 litres 

- static height = < 5 metres (with vessel above) 

- temperature = 6 / 12 °C 

- max. ambient temperature = 30 °C 

- no glycol 

FlAMCoMAT 


Increase in volume at 30 °C, without glycol = 0.43% 

95,000 x 0.43 

Expansion volume = –––––––––––– 

100 


= 409 litres 

= 511.25 litres 

Your choice 



Nominal operating pressure = 0.5 + 1 = 1.5 bar(g). 

As the selection table shows heat capacity, the aforementioned cooling capacity will have to be 

converted using a conversion factor of 0.412. 

The selection point is then 5400 kW x 0.412 = 2225 kW (2.2 MW) and 1.5 bar(g). 

The 2.2 MW - 1.5 bar(g) point is on the D0 pump curve 





47

Flamcomat III New Control 

Price band D 

The Flamcomat balanced pressure expansion equipment is sized according to the total system volume and the boiler/chiller 

load. The Flamcomat vessel is 80% efficient irrespective of the static height of the system. It is the ideal solution for large or tall 

installations where standard diaphragm expansion equipment is limited. 

The Flamcomat is a unique product that combines a balanced pressure system with an effective pressure step de-aerator 

function and an inter-link to control system top up via a variant pressurisation unit. 

The real-time LCD display shows the status of the mechanical components while monitoring the vessel contents and the 

system pressure. 

A common alarm volt free contact is included within the Flamcomat control unit for remote indication of a fault. Remote analogue 

indication of the vessel contents and system pressure are possible as optional extras. 

Low pressure de-aeration using the PALL ring process, which leads to a long life cycle and improved efficiences. 

Duty/standby controller available. 

Manufactured to DIN 4807 with full CE approval. 

Available in seventeen vessel capacities with twin pump units. 

Timeclock for programmed deaeration cycles and downtime. 

D twin pump sets 

Type Dimensions Connections Dry 

D. 

[mm] 

W. 

[mm] 

H. 

[mm] 

Vessel System Top-Up 

D0 (D02) 680 680 1480 1 1 / 2" 1 1 / 4" 1 

/ 2" 105 1 

D1 (D10) 680 680 1480 1 1 / 2" 1 1 / 4" 1 

/ 2" 110 1 

D2 (D20) 680 680 1480 1 1 / 2" 1 1 / 4" 1 

/ 2" 115 1 

D3 (D60) 680 680 1480 1 1 / 2" 1 1 / 4" 1 

/ 2" 150 1 

D4 (D80) 680 680 1680 1 1 / 2" 1 1 / 4" 1 

/ 2" 215 1 

D5 (D100) 680 680 1680 1 1 / 2" 1 1 / 4" 1 

/ 2" 225 1 

D6 (D130) 680 680 1680 1 1 / 2" 1 1 / 4" 1 

/ 2" 240 1 

Weight 

[kg] 



2 

Flamcomat vessels 

Price band D 

A unique product which combines all the essential elements required for a commercial heating or chilled system to be 

automatically pressurised, topped up and de-aerated in one highly efficient unit. 

• Accommodates water expansion during the heating cycle. 

• Tops up the system during the cooling cycle with leak make up. 

• Total air removal even when the system is not heating - the turbo de-aeration unit is unique to the Flamcovent, allowing 

continuous de-aeration of the system water. 

• Low pressure de-aeration using the patented PALL ring process, which leads to a long life cycle and improved efficiencies. 

• Micro-electronics using state-of-the-art Technology gives low power usage, long life and ease of maintenance. 

• Manufactured to DIN 4807, with full CE approval. 

Flamcomat GB main vessels 

Type 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP (M) 

Dry 

Weight 

[kg] 

Order 

Code 

GB 150 150 550 1350 G 1 1 / 2" 56 1 17710 

GB 200 200 550 1530 G 1 1 / 2" 71 1 17711 

GB 300 300 550 2030 G 1 1 / 2" 91 1 17712 

GB 400 400 750 1535 G 1 1 / 2" 131 1 17713 

GB 600 600 750 1955 G 1 1 / 2" 161 1 17714 

GB 500 500 750 1760 G 1 1 / 2" 151 1 17729 

GB 800 800 750 2355 G 1 1 / 2" 196 1 17715 

GB 1000 1000 750 2855 G 1 1 / 2" 227 1 17716 

GB 1000 1000 1000 1915 G 1 1 / 2" 261 1 17726 

GB 1200 1200 1000 2210 G 1 1 / 2" 291 1 17717 

GB 1600 1600 1000 2710 G 1 1 / 2" 346 1 17718 

GB 2000 2000 1200 2440 G 1 1 / 2" 431 1 17719 

GB 2800 2800 1200 3040 G 1 1 / 2" 516 1 17720 

GB 3500 3500 1200 3840 G 1 1 / 2" 626 1 17721 

GB 5000 5000 1500 3570 G 1 1 / 2" 1241 1 17722 

GB 6500 6500 1800 3500 G 1 1 / 2" 1711 1 17723 

GB 8000 8000 1900 3650 G 1 1 / 2" 1831 1 17724 

GB 10000 10000 2000 4050 G 1 1 / 2" 2026 1 17725 

Flamcomat BB auxiliary vessels 

Type 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP (M) 

Dry 

Weight 

[kg] 

Order 

Code 

BB 150 150 550 1350 G 1 1 / 2" 55 1 17760 

BB 200 200 550 1530 G 1 1 / 2" 70 1 17761 

BB 300 300 550 2030 G 1 1 / 2" 90 1 17762 

BB 400 400 750 1535 G 1 1 / 2" 130 1 17763 

BB 500 500 750 1760 G 1 1 / 2" 150 1 17779 

BB 600 600 750 1955 G 1 1 / 2" 160 1 17764 

BB 800 800 750 2355 G 1 1 / 2" 195 1 17765 

BB 1000 1000 750 2855 G 1 1 / 2" 226 1 17766 

BB 1000 1000 1000 1915 G 1 1 / 2" 260 1 17776 

BB 1200 1200 1000 2210 G 1 1 / 2" 290 1 17767 

BB 1600 1600 1000 2710 G 1 1 / 2" 345 1 17768 

BB 2000 2000 1200 2440 G 1 1 / 2" 430 1 17769 

BB 2800 2800 1200 3040 G 1 1 / 2" 515 1 17770 

BB 3500 3500 1200 3840 G 1 1 / 2" 625 1 17771 

BB 5000 5000 1500 3670 G 1 1 / 2" 1240 1 17772 

BB 6500 6500 1800 3500 G 1 1 / 2" 1710 1 17773 

BB 8000 8000 1900 3650 G 1 1 / 2" 1830 1 17774 

BB 10000 10000 2000 4050 G 1 1 / 2" 2025 1 17775 



49

3. 


Safety valves 

Prescor 

• For closed heating or chilled 

systems. 

• Working temperature range: 

-10 °C / 120 °C. 

• Suited for water/glycol mixtures 

up to 50%. 

Prescor S 


systems. 

• Ideal for securing larger commercial 

installations. 

• Working temperature range: 

-10 °C / 120 °C. 


up to 50%. 

Accessories 

for chilled 

and heating 

installations 

Prescor Solar 

• For closed solar installations. 


up to 100%. 

• Working temperature range: -30 °C / 

160 °C (120 °C continuously). 

• According to TÜV. SV.08-118.SOL. 

Prescomano 


systems. 

• Safety valves with 

pressure gauge (0 - 4 bar(g)). 

Flopressmano 


systems. 

• Safety valves with 


Flamco has a complete range of products for safeguarding chilled and 

heating systems. The various models of Flamco Prescor safety relief 

valves are used around the world to prevent overpressure in sealed 

systems. The FlexBalance and FlexBalance Plus are an excellent 

solution for preventing hydraulic lock in sealed systems. Pressure 

gauges and filling assemblies of various types are also available. 


Accessories for heating and chilled systems 

3 

Connection sets and 

isolating unions 

Connecting group ½ 

• For connecting expansion vessels 

to a heating or cooling system. 

• Consists of a shut-off valve, a fill and 

drain cock with hose connections 

and (optional) a pressure gauge. 

Flexfast ¾ 

• Quick disconnect coupler for checking 

the per-charge of the Flexcon 

expansion vessels up to 25 litres. 

• Enables replacing the expansion 

vessel without de-pressurising or 

draining the system. 

Mano(thermo)meters 

Pressure gauge 

• For monitoring system pressure. 

• Flexcon pressure gauges Ø 80 can 

be installed without de-pressurising 

or draining the system thanks to the 

self-closing shut-off valve. 

Manothermometer 

• For monitoring system pressure 

and system temperature. 

• Axial connection. 

Wall mounting 

Flexconsole ¾ 

• Supplied with a ½" vent plug. 

• Available in red or white color. 

Flexconsole Plus 

• Including Prescor ½ - 3 bar(g), 

Flexvent 3 /8, Flexfast quick 

disconnect coupler and 


Wall mounting bracket MB 

• For mounting 8 - 25 litres 

Flexcon and Airfix A/D vessels. 

• With slot in which the clenchring 

perfectly fits. Tightening two 

bolts is all it takes to firmly mount 

the vessel. 

• Straps are available for mounting 

vessels without clench rings. 

• MB 3: With quick snap spring and 

adapter. 

Dosing Pots 

Steel dosing pots 

• For dosing sealed heating or chilled 

systems with chemical additives. 

• Available in mild steel and stainless 

steel execution. 

• With 1" connections. 


• Max. working temperature: 90 °C. 

Hydraulic balancers 

FlexBalance F 

• Equalizes hydraulic unbalances 

inbetween primary and secundary 

circuits. 

• Flanged connections. 

• Internal speed reduction by 

perforated plate. 



• Supplied with automatic float vent. 

FlexBalance Plus F 

• Equalizes hydraulic unbalances 

inbetween primary and secundary 

circuits. 

• Flanged connections. 

• With Pall-rings. 



• Supplied with automatic float vent 

and a drain cock. 

Flexbalance EcoPlus C 

• For commercial heating or chilled 

systems. 

• Working temperature range: -10 °C / 

110 °C. 

• Working pressure range: 0.2 bar(g) / 

10 bar(g). 

• Supplied with Flexvent Top float vent 

and a drain valve with hose connection. 

• With Rp connections (supplied with 

conical compression couplings). 

• Including insulation with two quick 

closing straps. 


Check valves 

• Valves to meet water bye-law 

requirements. 

• Single and double check valves 

available. 

Pressure reducing valves 

• For pressure regulation. 

• Compact and with excellent 

performance. 

• Complete with an integral servicable 

strainer. 

Strainers 

• Y-strainers for many applications 

• With removable mesh cartridge for 

easy cleaning. 

• Brass body and stainless steel mesh. 

Component sets 

• For fitting to a Flexcon expansion 

vessel. 

• Including a Uni-Fil filling set, MB 2 

and Flopressmano. 

• Converts to give a vesselpak. 

Uni-Fil Filling sets 

• For temporary connection to the 

water mains. 

• Full set of fittings to meet water 

bye-laws. 


Supamix Thermostatic Mixing 

Valves 

• For general use with fail safe 

protection. 

• With anti-scale device 

• Brass or chromium plated body, 

complete with non-return valves and 

strainers. 

• WRc approved. 



51

Prescor safety valves: 

a complete range for the safety of your system 

If you are looking for reliable safety valves, you need 

look no further than Flamco's Prescor range. The 

best protection for all sealed heating and chilled 

systems from overpressure. The Prescor valves are 

suitable for systems with a capacity of no higher than 

580 kW at 3.0 bar. Systems with greater capacity will 

need the heavy-duty Prescor S. 

The benefits of Prescor 

• High-quality materials and construction guarantee 

reliable function when you need it most. 

• If there is a rapid build-up of pressure, the valve will 

'pop' open. The pressure can then be discharged 

quickly. 

• CE conformity mark. 

• The opening pressure of all valves is individually 

tested 100%. 

Cap of high-impact 

plastic. 

Anti-ageing spring steel prevents the 

set pressure from drifting. 

Robust brass housing. 

The diaphragm prevents moisture and dirt 

from getting into the moving parts of the 

safety valve during blowing off. 

Valve seal of high-quality rubber, heat-resistant 

to 140 ºC. The hardness of the rubber is 

adapted to the set pressure of the valve. These 

properties mean that the valve will not stick to 

the valve seat. 

PRESCOR 

All Prescor safety valves are set to the specified 

opening pressure during manufacture. This setting 

cannot be adjusted. It is important to check the 

requirements for the Prescor valve in advance. 

When choosing a Prescor safety valve, the capacity 

shown on the safety valve must exceed the nominal 

boiler capacity. 

The set pressure and maximum output for which the 

valve is suitable are indicated on the valve. 

Mount on the boiler, or as close as possible to it, in the supply 

line. Never fit a stopcock between the boiler and the valve. 



3 

Prescor S safety valves 

With connection dimensions of 1 1 /4" up to and 

including 2", these valves are the ideal safeguard for 

larger systems. 

More than one Prescor S safety valve may be fitted to 

a system so that it can meet the required capacity if 

the applicable regulations allow. When commissioning 

a system, it is advisable to flush the pipelines first. 

As with bleeding, this must never be done using the 

Prescor S safety valve. The system must be 

depressurised before the Prescor valve is fitted. 

Prescomano: a handy 

Flexcon safety valve and 

Flexcon pressure gauge 

in one. 

Handle for 

manually testing 

the valve. 

Spring for setting the pressure. 

This setting is locked. 

Prescor S type plate 

showing the set pressure 

and the maximum boiler 

capacity for which 

the valve is suitable. 

Valve housing made 

entirely of brass. 

Diaphragm that protects the spring, 

preventing water leakage via the 

spindle. 

Valve with seal of 

special rubber. 

Brass valve seat. 

Prescor safety valves carry an indication of the 

maximum boiler capacity for which they are designed. 

If the system contains more than one boiler or heat 

source and they can be individually isolated, each 

heat source must be fitted with a Prescor valve. 

The applicable regulations under the terms of 

EN 12828 concerning the position of the valve, the 

execution of discharge pipes, positing of tundish etc. 

must be followed carefully. 

PRESCOR S 

Important points: 

• Never block the discharge opening of a safety valve. 

• Do not use the safety valve to drain the system, 

de-pressurise it or to bleed it. 

• Always fit a tundish and a drain pipe of a correct 

diameter. 



53

Safety valves 

Price band C 

Flamco safety valves have a special design, which not only achieves a perfect seal, but also a large discharge capacity. The 

valve seal is made of high-quality rubber, which is heat resistant to 140 °C, and where the hardness of the rubber is adjusted to 

the set pressure of the safety valve. In this way, the valve cannot stick to the seat. 

Al valves are tested before they leave our facility and are available for heating, chilled and airconditioning installations. 

Prescor 

Specially designed for sealed systems. Pre-set, non adjustable with diaphragm seal and quick release. 

Type 

Set 

pressure 

[bar(g)] 

Connection BSP 

Inlet 

Capacity 

[kW] 

Prescor 1 / 2 3.0 1 

/ 2" F 1 

/ 2" F 125 50 FCSV 050 

Prescor 170 - 3 / 4 3.0 3 

/ 4" F 3 

/ 4" F 165 50 FCSV 075 

Prescor 320 - 1 3.0 1" F 1 1 / 4" F 395 16 FCSV 100 

Prescor 1 1 / 4 3.0 1 1 / 4" F 1 1 / 2" F 580 16 FCSV 125 

Outlet 

Order 

Code 

Nr. 0343 

Prescor S 

For closed central heating and chilled water installations. Up to 10 bar(g) available on request. 

Type 

Set 

pressure 

[bar(g)] 


Inlet 

Outlet 

Capacity 

[kW] 

Order 

Code 

Prescor S 700 1 1 / 4 3.0 1 1 / 4" F 1 1 / 2" F 810 1 FCSV 125/3 

Prescor S 960 1 1 / 2 3.0 1 1 / 2" F 2" F 1120 1 FCSV 150/3 

Prescor S 1700 2 3.0 2" F 2 1 / 2" F 1980 1 FCSV 200/3 

Nr. 0343 



3 

Prescor Solar 

Type 

Set 

pressure 

[bar(g)] 

Inlet 

Connection 

Outlet 

Capacity 

[kW] 

Order 

Code 

Prescor Solar 1 / 2 3.0 1 

/ 2" F 3 

/ 4" F 50 40 FCSV SOL 075/3 


/ 2" F 3 

/ 4" F 50 40 FCSV SOL 050/6 


/ 4" F 1" F 100 40 FCSV SOL 075/6 


/ 4" F 1" F 100 40 FCSV SOL 075/8 

Prescor Solar 1 6.0 1" F 1 1 / 4" F 200 16 FCSV SOL 100/6 



Nr. 0343 

Prescomano 

Combined safety valve and pressure gauge. 

Type 

Set 

pressure 

Connection BSP Capacity 

[kW] 

Order 

Code 

[bar(g)] Inlet Outlet 

Prescomano 1 / 2 NF 3.0 1 

/ 2" F 1 

/ 2" F 125 20 FCSV PRESCOM 

Nr. 0343 

Flopressmano 

Combined safety valve and pressure gauge. 

Type 

Set 

pressure 

Connection BSP Capacity 

[kW] 

Order 

Code 

[bar(g)] Inlet Outlet 

Flopress AG 3.0 1 

/ 2" F 1 

/ 2" F 100 30 FCSV FLOCOM 

Nr. 0343 

Tundish 

Screws into the outlet of the Prescor safety valve to give a safe atmospheric break when piping away discharge (Tundish). 

A 

B 

Type Connection BSP Application Order 

Code 

A B 

Tundish 1 / 2 1 

/ 2" M 1 

/ 2" F Prescor 1 / 2", Prescomano 1 / 2", Prescor B 1 / 2" 1 FCSVF 050 

Tundish 3 / 4 3 

/ 4" M 1" F Prescor B 1 / 2", Prescor 3 / 4", Prescomano 3 / 4", 1 FCSVF 075 

Prescor Solar 1 / 2" 

Tundish 1 1" M 1 1 / 2" F Prescor 3 / 4" TRD, Prescor Solar 3 / 4" 1 FCSVF 100 

Tundish 1 1 / 4 1 1 / 4" M 1 1 / 2" F Prescor 1", Prescor Solar 1" 1 FCSVF 125 

Tundish 1 1 / 2 1 1 / 2" M 1 1 / 2" F Prescor 1 1 / 4", Prescor S 1 / 4" 1 FCSVF 150 



55

Quickly connect, disconnect and inspect Flexcon 

expansion vessels! 

A Flexcon vessel can be directly connected to a 

pipeline. However, it is easier to use one of the 

Flexfast quick-release couplings, Flexconsoles or 

Flexcon connection assemblies shown here. 

These products make it easier to read off the 

pressure or to disconnect the vessel without having 

to drain the system or release the pressure. 


Everything you need from the Flexconsole and more in 

this complete solution in the same red finish as the 

Flexcon vessels. 

Supplied with: 

• Flexcon pressure gauge. 

• Flexvent floatvent. 

• Flamco safety valve. 

• Flexfast quick-release coupling. 

• Fixing set. 

Valve closed. 

Valve open. 

Valve open. 

Valve closed. 

Flexconsole 

This version is supplied 

with a ½" radiator cap 

plus manual de-aerator. 

FLEXCONSOLE PLUS 

Vessel connected to the 

system. 

Vessel disconnected from the 

system. 

FLEXCONSOLE 

FLEXFAST ¾" 

Flexfast quick-release couplings 

make the process of checking the 

initial pressure of Flexcon vessels up 

to and including 25 litres quick and 

easy, and also enable you to change 

the vessel without having to release 

pressure or drain it. 

Flexfast 

• Version with ¾" internal thread and ¾" external 

thread. 

• Easy to assemble with the right tools; then just 

screw in the components by hand. 

• Saves a considerable amount of time when 

servicing a Flexcon vessel. 



3 

Flexcon connection assemblies 

There are two versions: The Flexcon ½" connection 

assembly is suitable for Flexcon expansion vessels 

from 35 to 300 litres inclusive and systems up to a 

maximum of 660 kW. The Flexcon 1" connection 

assembly is suitable for Flexcon expansion vessels 

from 110 to 1,000 litres inclusive and systems up to a 

maximum of 2,355 kW. 

Flexcon connection assemblies include a drain tap 

and a valve. After the valve has been shut off, the 

vessel can be drained. It can then be either inspected 

or replaced. 

The Flexcon ½" connection assembly can be fitted to 

the expansion line, whereas the 1" version must be 

fitted to the water nipple of the Flexcon vessel. 

Valve with 

safety sleeve. 

Installation 

connection. 

Flexcon pressure 

gauge, Ø 50 mm 

(0 - 12 bar). 

Ball valve for filling 

and draining, with 

hose nipple 

and cap. 

FLEXCON 

CONNECTION ASSEMBLY ½" 

Coupling for 

attachment to the 

vessel. 

FLEXCON CONNECTION 

ASSEMBLY 1" 

FLEXCONTROL M 

FlexControl M 

For easy disconnecting of Flexcon vessels 

without having to drain the vessel or release 

pressure. 



57

Isolating unions and flexcon connection sets 

Price band C 

Connection set ½ 

A convenient lockshield valve and drain cock for connecting components to the system. 

Type Connection With pressure 

gauge 

Inlet Outlet 

BSP 

Order 

Code 

Flexcon connection group 1 / 2 1 

/ 2" M 12 mm* / 1 / 2" M yes 1 FCCG WITH 

Flexcon connection group 1 / 2 1 

/ 2" M 12 mm* / 1 / 2" M no 1 FCCG NO 

* Welding/Compression connection. 

Flexfast ¾ 

This isolating union for Flexcon vessels up to 50 litres makes it possible to check quickly and 

easily if a Flexcon expansion vessel is still set correctly (pre-pressure) or if it needs to be replaced. 

When the respective halves of the Flexfast are unscrewed, the sealing valves close off the system 

and vessel connections independently therefore making it quick and easy to release an expansion 

vessel from the system, without the system having to be drained and de-pressurised. 

Type Connection BSP Order 

Code 

Inlet 

Outlet 

Flexfast 3 / 4 3 

/ 4" F 3 

/ 4" M 1 27920 

Flexcon pressure gauges 

Price band C 


The pressure in the installation can be read from the pressure gauge. 0 - 4 bar(g) range with 

adjustable field segment. Rear connection on 63 mm, bottom connection on 80 mm. 

Type 

Connection Pressure 

range 

[bar(g)] 

Marking 

[bar(g)] 

Shut-off 

valve 

Order 

Code 

Manometer Ø 63 ax. 1 

/ 4" ax. 0 - 4 1.5 - 3.0 no 1 FCPG 63 

Manometer Ø 80 ax. 1 

/ 4" ax. 0 - 4 1.5 - 3.0 1 

/ 4" x 1 / 2" 1 FCPG 80 

Pressure/Thermo gauge 

The combined thermo/pressure gauge shows not only the pressure, but also the temperature. 0 - 4 bar(g) and 0 °C to 120 °C 

range with adjustable field segment. Self sealing pocket. Rear connection. 

O-ring 32 

Type System connection Range 

[bar(g)] 

Thermo pressure gauge ax. R 1 / 2" M 0 - 120 °C / 0 - 4 bar 20 FCPG TPG 

Order 

Code 



3 

Flexcon wall mounting 

Price band C 

For fitting and connecting a Flexcon expansion vessel to the wall. 

Flexconsole ¾ 

With the Flexconsole, the Flexcon vessel is set up vertically, suspended by the water connection. 

The console and the system expansion pipe are fitted to the ½" connection. 

Equiped with a wall plate with two slots so that the wall mounting is always suitably positioned. 


Code 

System 

Vessel 

Flexconsole 3 / 4 1 

/ 2" F 3 

/ 4" F 1 FLEXCONSOLE 3/4 

Flexconsole 3 / 4 white 1 

/ 2" F 3 

/ 4" F 1 FLEXCONSOLE 3/4 W 


As the conventional Flexconsole, but also with a Flexcon pressure gauge, a Flexvent floatvent, a 

safety valve set to 3.0 bar(g) and a Flexfast shut off valve. 


Code 

System 

Vessel 

Flexconsole Plus 3 

/ 4" F 3 

/ 4" F 1 FLEXCONSOLE PLUS 

Flexconsole Plus 3 / 4 x 3 / 4 

without Flexfast 

3 

/ 4" 3 

/ 4" 1 FLEXCONSOLE N/AS 

MB 

For mounting Flexcon and Airfix vessels of 8 - 25 litre. 

Comes with a slot in which the Flexcon vessel clamp ring fits precisely. Tightening the two bolts is all that is needed to make a 

sturdy connection. 

• Material: DC01 A-m, zinc coated. 

• Connection to the wall with two Ø8 plugs and two Ø6 screws with hexagon head (wrench 10). Plugs and screws are 

included. 

• Connection of the vessel to the MB by means of two M5 bolts with cross head. 

• Separately available are sets of 5 hose clamps for connection vessels without clench ring (max. size approx. Ø 325 mm). 

• MB 3: With spring and adapter for easy mounting. 

Type Dimensions Order 

Code 

W. 

[mm] 

H. 

[mm] 

Vessel support MB 2 94 113 25 FC BAND 

Vessel support MB 3 94 113 25 27903 



59


Price band C 

Check Valves 

Purpose designed valves to meet the water bye-law requirements. 

A 

B 

Type 

Syst. 

conn. 

[mm] 

A 

[mm] 

Dimensions 

Single check valve SC1 15 28 25 1 FC SC1 

Double check valve DC2 22 103 50 1 FC 22mm DC VALVE 

B 

[mm] 

Pressure Reducing Valves 

Compact with excellent performance. Utilises the proven diaphragm principle of pressure regulation. 

The adjustment is by screw with locking nut and the gauge supplied may be mounted on either side. 

Complete with an integral servicable strainer/jitter. 

Order 

Code 

B 

A 

Type 

Syst. 

conn. 

BSP (F) 

Max. 

pressure 

[bar(g)] 

Dimensions 

1 

/ 2" PR with gauge 1 

/ 2" 16 65 100 1 FC PRV 050WG 

3 

/ 4" PR with gauge 3 

/ 4" 16 75 105 1 FC PRV 075WG 

1" PR with gauge 1" 16 100 130 1 FC PRV 100WG 

1 1 / 4" PR with gauge 1 1 / 4" - 190 160 1 FC PRV 125WG 

1 1 / 2" PR with gauge 1 1 / 2" - 220 220 1 FC PRV 150WG 

2" PR with gauge 2" - 250 220 1 FC PRV 200WG 

1 

/ 2" PRS 1 

/ 2" 16 65 80 1 FC PRS 050/1 

3 

/ 4" PRS 3 

/ 4" 16 75 85 1 FC PRS 075/1 

A 

[mm] 

B 

[mm] 

Order 

Code 



3 

Strainers 

Standard 'Y' pattern with removable mesh cartridge for easy cleaning. The brass body and stainless steel mesh is ideal for 

many sealed applications. 

C 

A 

C 

B 

Type 

Syst. 

conn. 

BSP (F) 

A 

[mm] 

Dimensions 

Type Y - 1 / 2" 1 

/ 2" 58 39 10 1 FR 41 1132 

Type Y - 3 / 4" 3 

/ 4" 74 45 13 1 FR 41 1142 

Type Y - 1" 1" 92 53 15 1 FR 41 1152 

Type Y - 1 1 / 4" 1 1 / 4" - - - 1 FR 41 0115 

Type Y - 1 1 / 2" 1 1 / 2" - - - 1 FR 41 0150 

Type Y - 2" 2" - - - 1 FR 41 0120 

Component Sets 

For fitting to a Flexcon expansion vessel (included in Vesselpak). 

B 

[mm] 

C 

[mm] 

Order 

Code 

Type 

Syst. conn. 

[mm] 

Set A 15 1 FC VESSELPAK 

Set B 15 1 FC VESSPAK B 

Uni-Fil Filling sets 

Full set of fittings to meet water bye-laws for temporary connection to the water mains. Available as standard or automatic 

pressure unit. 

Order 

Code 

Type 

Syst. 

conn. 

([mm] / BSP) 

Max. working 

pressure 

[bar(g)] 

Uni-Fil 15 / 1 / 2" 10 1 FC UNI-FILP 

Uni-Fil auto 15 / 1 / 2" 10 1 FC UNI-FIL A 

Order 

Code 



61

Supamix FS 

WRC listed valves to BS.1415 with anti-scale device for general use with fail safe protection. 

Brass body complete with non-return valves and strainers. 

A 

C 

B 

Type 

Syst. 

conn. 

[mm] 

A 

[mm] 

Dimensions 

Supamix FS 15 (Brass) 15 140 130 60 1 FR SUPA FS15 

Supamix FS 22 (Brass) 22 140 130 60 1 FR SUPA FS22 

B 

[mm] 

C 

[mm] 

Order 

Code 

Supamix NHS 

WRC approved valves with chrome body, complete with non-return valves and strainers, in compliance with the National 

Health Service Model Engineering Specification D.08 for Healthcare premises. 

Approved for: 

• High/low pressure showers. 

• High/low pressure washbasins. 

• Low pressure bidets. 

A 

C 

B 

Type 

Syst. 

conn. 

[mm] 

A 

[mm] 

Dimensions 

Supamix NHS 15 (Chrome) 15 140 130 60 1 FR SUPA N15 

Supamix NHS 22 (Chrome) 22 140 130 60 1 FR SUPA N22 

B 

[mm] 

C 

[mm] 

Order 

Code 



3 

Dosing pots 

Dosing pots are used for dosing sealed heating and chilled systems with chemical additives. Internally uncoated to guarantee 

chemical compatibility with standard installations. 

Mild steel dosing pots 

Dosing pots for sealed heating or chilled systems. 

Type Dimensions System 

connection 

H. 

Ø 

[mm] 

[mm] 

Dosing pot 6 l 663 200 1" 11.5 1 FC D POT 6 






Stainless steel dosing pots 

Dosing pots for sealed heating or chilled systems rated to 3.0 bar(g) and 90 °C. 

Weight 

[kg] 

Order 

Code 

Type Dimensions System 

connection 

H. 

Ø 

W. 

[mm] 

[mm] 

[mm] 

Stainless steel dosing pot 3.5 l 700 200 310 1" 1 SS DOSING 3.5 

Stainless steel dosing pot 6 l 810 200 310 1" 1 SS DOSING 6.0 





Order 

Code 



63

The solution for hydraulic imbalance in 

central heating installations 

Increasingly, heating installations are fitted with 

several boilers. As a result, individual boilers can 

be switched on or off, depending on the heating 

requirements. In addition, there are often multiple 

sub-systems fitted with individual pumps. With 

these systems, there is a chance of hydraulic 

imbalance, which will lead to poor heat transfer, 

overloading of pumps and a system that is difficult 

to stabilise. 

Using a FlexBalance hydraulic balancer prevents 

this problem and improves the efficiency of the 

system. 

Cone-shaped air chamber. 

Area where the air is collected. 

Supply connections. 

Steel body. 

Cage with PALL rings for air (top) and dirt (bottom) separation. 

Drainage tap for removing pollutions that are 

heavier than water. 

Return connections. 

Area where the dirt particles are collected. 

FLEXBALANCE PLUS 

How a hydraulic balancer works 

By fitting a FlexBalance balance vessel, the primary 

and secondary circuits are connected and a balance is 

maintained between the various flow speeds. 

The flow in the primary and secondary circuits stays 

independent in all situations. 

The flows in both sub-circuits are not influenced 

in any way. 

Schematic illustration of a system with several boilers and pumps 



3 

FlexBalance hydraulic balancer benefits 

• No more overloaded pumps. 

• More accurate regulation of the system is possible. 

• Considerably improved warmth transference. 

• Higher output by the system. 

Two extra FlexBalance functions 

FlexBalance hydraulic balancers must be placed 

between the primary and secondary circuits to 

balance out both circuits. This is also the perfect 

place for air and dirt separation: 

• With the high temperature water flowing through the 

supply connections, this is the best possible point 

for air separation. 

• Dirt separation takes place in the return connection, 

behind the radiators, and immediately before the 

boiler, thus protecting it from dirt. 

bar(g) kPa 

Flow resistance FlexBalance 

bar(g) kPa 

Flow resistance FlexBalance Plus 

Pressure loss [kPa - bar] 

Pressure loss [kPa - bar] 

Flow [m³/h] 

Flow [m³/h] 

PALL ring technology benefits 

Instead of using perforated plates (FlexBalance) for air 

and dirt seperation, the FlexBalance Plus uses our 

patented PALL ring technology, which has the 

following benefits: 

• Shorter distance between supply and return 

connections possible. 

• Even the smallest micro-bubbles and dirt particles 

are separated. 

• Reduced flow-rate prevents heat exchange between 

the cold return water and the hot supply water. 

• Considerably greater thermal yield than other 

hydraulic balancers on the market. 



65

FlexBalance hydraulic separator 

Price band D 

For balancing hydraulic pressures in heating installations consisting of multiple circuits and pumps. FlexBalance hydraulic 

separators are supplied with an automatic air vent and a drain point. 

• Max. operating pressure: 10 bar. 


• FlexBalance DN150 and larger: Standard equipped with legs. 

FlexBalance F 

With perforated plate and flanged connections. 

Type 

Volume 

[l] 

Dimensions Connection Weight 

[kg] 

Ø H. DN Ø 

[mm] * [mm] [mm] 

Capacity 

[kW] ** 

Flow in the 

system 

(m 3 /h) 

FlexBalance F 50 17 350 900 50 60.3 25 100 - 200 5 - 15 1 FC F/BAL F 50 







FlexBalance F 250 1787 1220 4136 250 273 545 2500 - 4500 110 - 350 1 FC F/BAL F 250 




* Connections included. 

** Depending on flow velocity. 

Order 

Code 



3 

FlexBalance Plus hydraulic separator 

Price band D 

For balancing hydraulic pressures in heating installations consisting of multiple circuits and pumps. FlexBalance hydraulic 

separators are supplied with an automatic air vent and a dirt chamber. 



• FlexBalance Plus DN150 and larger: Standard equipped with legs. 

• Excellent hydraulic control, in combination with a large air and dirt separation capacity. 

• Smaller construction height than standard hydraulic seperators. 

FlexBalance Plus F 

With Pall rings and flanged connections. 

Type 

Volume 

[l] 

Dimensions Connection Weight 

[kg] 

Ø H. DN Ø 

[mm] * [mm] [mm] 

Capacity 

[kW] ** 

Flow in the 

system 

(m 3 /h) 

FlexBalance Plus F 50 17.5 350 950 50 60.3 28 100 - 200 5 - 15 1 FC F/BAL F 50 PLUS 

FlexBalance Plus F 65 17.5 350 950 65 76.1 30 180 - 330 10 - 17 1 FC F/BAL F 65 PLUS 

FlexBalance Plus F 80 67 470 1265 80 88.9 50 300 - 450 15 - 30 1 FC F/BAL F 80 PLUS 





FlexBalance Plus F 250 1792 1220 3646 250 273 657 2500 - 4500 110 - 350 1 FC F/BAL F 250 PLUS 




* Connections included. 

**Depending on flow velocity. 

Order 

Code 



67



The FlexBalance EcoPlus C allows hydraulic separation between the primary and secondary circuits of commercial heating and 

chilled systems with air and dirt separation. 

• Medium: Water and Water/glycol solutions up to 50%. 

• Min./max. operation temperature: normal conditions -10 °C / 110 °C. 

• Min./max. operation pressure: 0.2 bar(g) / 10 bar(g). 

• Intergration of air- and dirt separation. 

• Steel (S235JRG2) vessel with red epoxy powder coating, RAL 3002. 

• Compression coupling (4x) with con. seal, galvanised steel. NR 340 (pre-assembled). 

• Equipped with an Flexvent Top 3 /8" white (28510) - separate in boxpackaging. 

• Equipped with an drain valve 1 /2" (KP190110) with hose connection. 

• Insulation: 

Material: PUR foam. 

Color: Grey. 

With two quick fasteners. 

D 

E 

C 

F 

A 

B 

G 

Ø 14,5 

Type 

Syst. 

conn. 

Volume 

[l] 

Max. 

capacity 

(kW) 

A 

[mm] 

B 

[mm] 

Dimensions 

Flexbalance EcoPlus C 1 Rp 1" 1.4 60 290 276 85 260 157 618 450 1 28377 

Flexbalance EcoPlus C 1 1 / 4 Rp 1 1 / 4" 2.3 100 340 321 85 290 157 678 510 1 28378 

Flexbalance EcoPlus C 1 1 / 2 Rp 1 1 / 2" 3.8 140 340 320 85 320 157 678 510 1 28379 

Flexbalance EcoPlus C 2 Rp 2" 4.5 200 400 373 95 350 167 752 585 1 28380 

C 

[mm] 

D 

[mm] 

E 

[mm] 

F 

[mm] 

G 

[mm] 

Order 

Code 


 

 



69

4. 

Potable water vessels 

Domestic installations lose tens of thousands of litres of potable water 

due to expansion water leaking from the vent and expansion pipe. 

Flamco’s Airfix A and Airfix D diaphragm pressure expansion vessels 

for Potable equipment work to prevent this waste. The Airfix vessels 

are designed to allow a continuous through-flow of water to maintain 

constant circulation, this process prevents the formation of bacteria. 

These expansion vessels can be applied in combination with all hot 

water calorifiers and as surge vessels in pressure boosting systems. 



4 


Fixed diaphragm 

Airfix A 

• 8 - 80 litres. 


10 bar(g) (8 - 25 litre) and 

8 bar(g) (35 - 80 litre). 

• Pressurized vessels with 

streamline function. 

• Suitable for mains-water systems. 

• KIWA approved. 

Airfix D 

• 8 - 35 litres. 


• Pressurized vessels with 

advanced integral streamline 

function. 

• Includes T-piece. 

• Suitable for mains-water systems. 

• KIWA approved. 

Replaceable diaphragm 

(not streamlined) 

Airfix P 2 - 35 

• 2 - 35 litres. 



• Colour: aluminium-grey 

(RAL 9006). 

• WRAS, WRc and ACS approved. 

Airfix P 50 - 300 

• 50 - 300 litres. 



• Colour: aluminium-grey 

(RAL 9006). 


Airfix P 500 - 2000 UK 

• 500 - 2.000 litres. 



• Colour: grey (RAL 7040). 

• WRAS approved. 

Removable Replaceable diaphragm 

(streamlined) 

Airfix D-E 

• 50 - 3.000 litres. 


• Pressurized vessels with full 

streamline function. 

• DVGW, ACS, WRAS and WRc 

approved. 

• Electronic diaphragm-rupture sensor. 

Airfix D-E-L 

• 50 - 600 litres. 


• Pressurized vessels with streamline 

function. 

• DVGW and WRAS approved. 

• Observation port for diaphragm 

rupture sensing. 

Airfix D-E-P 500 - 3000 

• 500 - 3.000 litres. 



• Colour: grey (RAL 7040). 


Airfix P Horizontal 

• 24 - 500 litres. 



• Colour: aluminium-grey (RAL 9006). 


Airfix D-E-B 

• 50 - 3.000 litres. 






71

Airfix A/D: 

Flamco’s Kiwa certified expansion vessels 

Altogether, UK households lose many hundred 

million litres of drinking water every year due to 

expansion water slowly dripping away into the 

sewer. 

The Airfix A and Airfix D expansion vessels operate 

such that the water flows right through and they are 

continuously flushed with fresh water from the mains. 

This prevents tepid, stagnant water from collecting in 

the vessel in which bacterial growth could occur. 

The Airfix expansion vessel has a KIWA label, and 

therefore it may be used in drinking water 

installations. The water and nitrogen side of the 

vessel are epoxy coated, so that the water cannot 

come into contact with bare steel. 

C E R T I F I E D 

The Airfix A vessel comes 

equipped with a plastic flow 

divider, suitable for T-pieces, for 

a continuous stream of max ¾" 

(22 mm). 

This flow divider is placed in the 

T-piece (which does not come 

with the vessel). 

AIRFIX A 

Benefits of using Airfix A and Airfix D 

• Easy mounting. 

• Fitted with a corrosion-resistant plastic coating inside and out, both on the 

water side and the nitrogen side. 

• Diaphragm and coating do not add any colour, odour or taste to the water. 

• Can be used in combination with any storage boiler system. 

• Can also be used in pressure boosting systems. 

• Fitted with special rubber diaphragm (EPDM). 

The vessel must be installed in 

the supply line and a throughflow 

must be confirmed. 



4 

Designed for quality and safety 

When using an Airfix A or Airfix D expansion vessel, a 

pressure reducing valve must always be installed, in 

order to guarantee a constant supply pressure and, 

therefore, proper flow from the expansion vessel. 

In addition, a Prescor inlet combination or a 

combination of an isolating valve, a controllable relief 

valve and a Prescor B boiler valve must be installed. 

PRESCOR 

INLET COMBINATION 

PRESCOR B 

BOILER VALVE 

Special rubber diaphragm and 

vessel coating have been 

internationally approved for 

use in combination with 

drinking water, in accordance 

with CE regulation 

2002/16/EG. 

Airfix D vessels use a specially 

supplied T-piece, with a throughflow 

design via an internal divider, 

to ensure complete through-flow of 

the vessel. 

Reliable clamping ring 

construction that does not 

damage the vessel or the 

diaphragm. 

All Airfix A and Airfix D 

vessels are white in colour. 

Internal coating prevents rust 

formation, even in the event of 

moisture. 

AIRFIX D 



73

Calculation for Airfix vessels 

for mains-water systems 

Basic concepts for the calculation 

of an expansion vessel in a mains-water 

system 

The following concepts are important in selecting the 

right vessel: 

• System water capacity 

The total capacity of the boiler system. 

• Increase in water volume (in %) 

The table below shows data on the water volume 

increase in percentage points when the temperature 

of the water increases by between 10 °C and 70 °C. 

Increase in temperature 

Increase in volume 

10 - 40 °C 0.75% 

10 - 50 °C 1.18% 

10 - 60 °C 1.68% 

10 - 70 °C 2.25% 

• Expansion volume 

The expansion volume is determined in the following 

way: expansion volume = capacity x increase in 

volume at the maximum temperature. 

• Fill level 

The pressure of the water supply when cold must be 

0.2 bar(g) above the initial pressure of the expansion 

vessel; otherwise, as the vessel cooled down the 

total water capacity would not be pushed out of the 

expansion vessel. That is why there must always be 

a residual amount of water in the vessel at the 

lowest operating pressure. This is called the fill 

level. 

• Initial pressure of the vessel 

This must be 0.2 bar(g) under the pressure of the 

water supplied when cold. 

• Residual factor 

1 - fill level: 

This determines the residual factor of the expansion 

vessel. 

• Output 

This is an expression of the ratio between gross and 

net vessel capacity. 

Cold water supply pressure - Initial pressure 

I ––––––––––––––––––––––––––––––––––––––– = fill level 

Cold water supply pressure 

This means that the residual factor of the vessel can 

be determined. 

Residual factor = 1 - fill level. 

The end pressure must be 10% lower than the set 

pressure of the safety valve. 

The output is calculated using the formula below: 

End Cold water 

pressure - supply pressure 

II –––––––––––––––––––––– x residual factor = output 

End pressure 

Note: pressure in bar absolute 

The maximum permissible output for the Airfix D-E/D- 

E-B vessels is 60% (0.60), while for the A and D 

vessels it is 63% (0.63). 

• End pressure 

This is the maximum permissible pressure of the 

system at the vessel itself. The end pressure is 

equal to 90% of the set pressure of the Prescor 

boiler valve or the Prescor inlet assembly if it is 

mounted at the same level as the vessel. 

• Gross vessel capacity 

The gross capacity of the vessel is determined in the 

following way: 

expansion volume 

gross capacity of the vessel = ––––––––––––––––––––– 

output 



4 

Example calculation of expansion vessels for mains-water systems 

Data 

- water capacity of the boiler = 150 litres 

- maximum water temperature = 70 °C 

- cold water supply pressure = 4 bar(g) 

- safety valve set pressure = 8 bar(g) 

- vessel initial pressure (4 - 0.2) = 3.8 bar(g) 

- end pressure (mean) = 7.2 bar(g) 

Initial vessel pressure = Cold water supply pressure - 0.2 bar(g) = 3.8 

End pressure (mean) 

= Set pressure of safety valve x 90% = 7.2 bar(g). 

Calculation 

Increase in volume: at 70 ºC is 2.25% = 150 x 2.25 % = 3.4 litres 

(cold water supply pressure - initial pressure) (4.0 + 1.0) - (3.8 + 1.0) 

Fill level: ––––––––––––––––––––––––––––––––––––––– = –––––––––––––––––––– = 0.04 

(cold water supply pressure) (4.0 + 1.0) 

Residual factor: 1 - fill level= 1 - 0.04 = 0.96 

(end pressure - cold water supply pressure) (7.2 + 1.0) - (4.0 + 1.0) 

Output: –––––––––––––––––––––––––––––––––––––– x residual factor = –––––––––––––––––––– x 0.96 = 0.375 

(end pressure) (7.2 + 1.0) 

Required gross capacity of expansion vessel: 3.4 / 0.375 = 9.1 litres 

Airfix expansion vessel to select: Airfix A 12/4.0 

(adjust initial pressure locally to 3.8 bar(g)). 



75

Instructions for correct fitting 

of expansion vessels in hot-water potable 

systems 

• Where an expansion vessel is used in a potable 

system, it must always be used in combination with 

a Prescor inlet assembly or Prescor B boiler valve. 

• The expansion vessel must be fitted in the coldwater 

line, between the non-return valve and the 

boiler. 

• The expansion vessel's initial pressure must be 

lower than the pressure in the cold-water line or the 

pressure behind a governor. 

• The use of expansion vessels in boiler systems must 

always comply with the demands of the local water 

authority. 

Airfix selection table 

Boiler capacity 

[l] 

Initial pressure 

[bar(g)] 

Prescor B boiler valve set pressure 

Prescor inlet assembly 

6 bar(g) 7 bar(g) 8 bar(g) 10 bar(g) 

100 3 Airfix 8/3 Airfix 8/3 Airfix 8/3 Airfix 8/3 












4 

Airfix A 

Price band C 

Potable water vessels for use on water supplies including unvented HWS systems and water boosting sets. The famous 

Flexcon clench ring construction allows the water section to be surface treated before assembly. The inside of the Airfix vessel 

has a special coating which prevents oxidation. The composition of the diaphragm has been made for this range in such a way 

that there will be no variation in smell, colour or taste. 



• WRAS Approved. 

Airfix A 

The Airfix A expansion vessel is supplied with a flow divider. This flow divider can be fitted 

between a T-piece and the Airfix A vessel (T-piece not supplied with the vessel). The Airfix 

A expansion vessel and T-piece can be fitted in the cold-water system of the boiler and flow 

through is established. 

Type 

Gas 

charge 

[bar(g)] 

Max. 

work. 

pres. 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

Order 

Code 

Airfix A 8 4 10 245 301 3 

/ 4" 3.2 50 FCAF 008 

Airfix A 12 4 10 286 334 3 

/ 4" 4.3 36 FCAF 012 

Airfix A 18 4 10 328 325 3 

/ 4" 4.9 24 FCAF 018 

Airfix A 25 4 10 358 378 3 

/ 4" 6.6 18 FCAF 025 

Airfix A 35 4 8 396 437 3 

/ 4" 8.1 18 FCAF 035 

Nr. 0343 

Airfix D 

Price band C 

Potable water vessels for use on water supplies including unvented HWS systems and water boosting sets. The famous 

Flexcon clench ring construction allows the water section to be surface treated before assembly. The inside of the Airfix vessel 

has a special coating which prevents oxidation. The composition of the diaphragm has been made for this range in such a way 

that there will be no variation in smell, colour or taste. 



• WRAS Approved. 

Airfix D 

Airfix D vessels use a special T-piece (supplied) which directs water flow through with its internal 

divider to ensure full flow-through in the vessel. 

Type 

Gas 

charge 

[bar(g)] 

Max. 

work. 

pres. 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

Order 

Code 

Airfix D 8 4 10 245 301 3 

/ 4" 3.2 50 FCAF D 8 

Airfix D 12 4 10 286 334 3 

/ 4" 4.3 36 FCAF D 12 

Airfix D 18 4 10 328 325 3 

/ 4" 4.9 24 FCAF D 18 

Airfix D 25 4 10 358 378 3 

/ 4" 6.6 18 FCAF D 25 

Airfix D 35 4 8 396 437 3 

/ 4" 8.1 18 FCAF D 35 

Nr. 0343 



77

Airfix P: expansion vessels for 

pressurised systems 

Airfix P expansion vessels are suitable for domestic, 

process or extinguishing systems which need oxygenrich 

water. They are available with a capacity of 2 - 

5,000 litres. 

Airfix P vessels comply with the requirements of the 

European Pressure-equipment Directive, 97/23/EC. 

AIRFIX P 2-35 

AIRFIX D-E-P 500 AIRFIX D-E-P 750-5000 

AIRFIX P 50-300 

AIRFIX P HORIZONTAL 



4 

All vessels have a removable diaphragm. 

The vessel connection is not streamlined. 

Airfix P types 750 - 5,000 inclusive are equipped with 

a pressure gauge. 

Male screw thread connection 

Butyl-rubber bellows diaphragm 

Steel vessel with RAL 9006 coating 

System connection 

AIRFIX D-E-P 500 

The benefits of Airfix P 

• A wide-ranging line, suitable for many different uses. 

• Available in both vertical and horizontal models. 

• All vessels are WRc and ACS-certified. 



79

Airfix P 

Price Band C 

Potable water expansion vessels for use in domestic and commercial sealed chilled and hot water systems. 

The vessels are designed to incorporate a unique contoured, interchangeable diaphragm. 



Airfix P Sizing chart 

For potable water expansion vessels. 

Sized using: 

• Cold Feed Pressure: 3.0 bar(g). 

• Max. temperature: 60 ºC. 

• 3.0 bar(g) mains supply. 

• 6.0 bar(g) expansion relief valve setting. 

Potable vessel size 

System volume 

[l] 

2 33 

3 50 

5 85 

8 135 

12 200 

16 270 

18 300 

24 400 

32 590 

50 840 

60 1,000 

80 1,350 

100 1,680 

150 2,530 

200 3,370 

300 5,050 

500 8,430 

750 12,650 

1,000 16,850 

Airfix P 2 - 35 

• Colour: grey coated (RAL 9006). 



Type 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Connection 

(M) 

Weight 

[kg] 

Diaphragm 

10.0 bar(g) 

Order 

Code 

Airfix P 2 ** 2 120 235 1 

/ 2" 4.6 * Butyl 336 FCAF P02 10B 

Airfix P 3 3 170 240 3 

/ 4" 1.5 Butyl 168 FCAF P03 10B 

Airfix P 5 5 170 275 3 

/ 4" 1.7 Butyl 144 FCAF P05 10B 

Airfix P 8 8 220 305 3 

/ 4" 2.2 Butyl 90 FCAF P08 10B 

Airfix P 12 12 260 310 3 

/ 4" 2.9 Butyl 72 FCAF P12 10B 

Airfix P 16 16 260 345 3 

/ 4" 3.4 EPDM 60 FCAF P16 10B 

Airfix P 18 18 260 375 3 

/ 4" 3.5 EPDM 60 FCAF P18 10B 

Airfix P 24 24 260 485 3 

/ 4" 4.3 EPDM 56 FCAF P24 10B 

Airfix P 35 35 380 470 1" 8.0 EPDM 24 FCAF P35 10B 

* Set of four in one box. 

** Standard gas charge: 0.5 bar(g). 

Nr. 1370 



4 

Airfix P 50 - 300 




Type 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Connection 

(M) 

Weight 

[kg] 

10.0 bar(g) 

Order 

Code 

Airfix P 50 50 380 720 1" 9.9 15 FCAF P50 10B 





Airfix P 200 200 590 1070 1 1 / 4" 37.5 8 FCAF P200 10B 

Airfix P 300 300 650 1250 1 1 / 4" 50.5 3 FCAF P300 10B 

Nr. 1370 

Airfix P 500 - 2000 

• Max. vessel temperature dependant on size. 



Type 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

System 

connection 

Weight 

[kg] 

10.0 bar(g) 

Order 

Code 

Airfix P 500 500 750 1600 1 1 / 4" M 59 1 FCAF P500 10B 

Airfix P 750 750 800 1820 2" F 154 1 FCAF P750 10B 

Airfix P 1000 1000 800 2130 2 1 / 2" F 184 1 FCAF P1000 10B 

Airfix P 1500 1500 1000 2400 2 1 / 2" F 423 1 FCAF P1500 10B 

Airfix P 2000 2000 1100 2745 DN 65 Flange 513 1 FCAF P2000 10B 

Nr. 1370 

Airfix D-E-P 500 - 3000 




• Airfix D-E-P 500 supplied with constructionring. 

Airfix D-E-P 750 - 3,000 supplied with feet. 

Type * 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

System Weight 

connection [kg] 

(M) 

Diaphragm 

10.0 bar(g) 

Order 

Code 

Airfix D-E-P 500 500 650 1780 R 1 1 / 2" 86 EPDM 1 FCAF DEP 500 

Airfix D-E-P 750 750 750 2035 R 1 1 / 2" 128 EPDM 1 FCAF DEP 750 

Airfix D-E-P 1000 1000 750 2535 Rp 2" 163 Butyl 1 FCAF DEP 1000 

Airfix D-E-P 1500 1500 1000 2510 Rp 2 1 / 2" 423 Butyl 1 FCAF DEP 1500 




* Special: D-E-P 5000 litre on request (Not WRAS approved). 

Airfix P Horizontal 



Type 

Max. Volume 

work. [l] 

press. 

[bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

System Weight 

connection 

[kg] 

(M) 

Order 

Code 

Airfix P 24-H 8 24 260 485 3 

/ 4" 4.7 56 FCAF P24 HOR 10B 

Airfix P 50-H 10 50 380 595 1" 8.1 20 FCAF P50 HOR 10B 





Airfix P 200-H 10 200 590 940 1 1 / 4" 34.2 6 FCAF P200 HOR 10B 



Nr. 1370 



81

Well-designed Airfix technology offers 

users significant benefits 

Diaphragm pressure expansion vessels with 

removable diaphragms are suitable for use in hot 

water, boosted and water-supply systems. 

The Airfix D-E expansion vessel can be used in 

boosted systems either on the suction side or the 

discharge side of the pumps. 

These systems are designed to prevent low pressures 

and changes in pressure at low flow rates. 

AIRFIX D-E-B 

AIRFIX D-E-L 

AIRFIX D-E 

Airfix D-E 

Flow through design. 

The two-way flanged system 

connection is directly connected to 

the flow of the mains water line. 

Airfix D-E-B 

For domestic, process or 

extinguishing systems, with a 

steel single threaded 

connection as standard 

Airfix D-E-L 

Streamlined flow-through 

diaphragm pressure 

expansion vessel for use 

in pressurising, water 

supply and drinkingwater 

systems. 

Benefits of using the Airfix D-E 

• Vessel through-flow. 

• Low pressure drop. 

• The standard diaphragm-rupture sensor may be 

configured for remote-control read-out. 

• Easy to install, with a long service life. 



4 

The Airfix D-E is sturdy, reliable and easy to 

install. 

The Airfix D-E is a through-flow vessel with two 

flanged connections and is equipped with a removable 

butyl-rubber diaphragm. 

The Airfix D-E is fitted with an electronic diaphragmrupture 

sensor as standard and has an internallycoated 

steel through-flow flange. 

Pressure gauge with self-sealing 

reducer, vessel connection Rp 3 /8 DIN 2999-1. 

Diaphragm-rupture sensor, 

red LED light to indicate 

diaphragm rupture. 

Normal permissible initial gas pressure 

in delivery condition: 6 bar. 

Airfix D-E vessels have a green external 

coating. 

Two-way connection 

for the system pipework. 

AIRFIX D-E 

The Airfix D-E expansion vessel collects the water in 

its butyl-rubber diaphragm. Should the system 

pressure rise (when the pump starts up or water is no 

longer being drawn off) the vessel will take in water 

which will collect in the diaphragm; should the system 

pressure drop (if water is drawn off), this water will be 

recirculated into the draw off line. 

The flow rate through the vessel is coupled with a 

minimal loss of pressure. 



83

Airfix expansion vessel calculation for 

pressure boosting sets (mains water) 

The system can be used for the following applications: 

a. In small independent mains-water systems which 

draw water from an aquifer or well. 

b. in systems which, although they are connected to a 

water main, are so far from a pumping station or 

water tower that pressure must be boosted locally. 

The pressure expansion vessel is used to maintain 

uniform pressure in the system in combination with a 

pressure switch that activates and deactivates the 

pump. 

If the pressure expansion vessel in question has a 

greater capacity than required for the aforementioned 

use, it can also be used as a storage vessel. In this 

respect, the pump does not have to be activated when 

small amounts are removed by the system, increasing 

the pump's overall service life. 

The cut-in pressure of the pressure switch should 

preferably be set 0.2 bar(g) higher than the expansion 

vessel's initial pressure. The cut-in pressure for a 

expansion vessel with 3.0 bar(g) initial pressure is 

therefore 3.2 bar(g). 

Selecting the appropriate Airfix 

expansion vessel 

Two factors play an important role in the choice of an 

expansion vessel. The first consideration is the total 

flow requirements of the system. This determines the 

pump capacity, which can be used as the basis for the 

calculation. The second factor of importance is the 

time the pump needs to top up the expansion vessel 

from minimum to maximum pressure. 



4 

The size of the pressure expansion vessel can be calculated using the following formula: 

Q u 

+ Q i 

p u 

+ 1 p i 

+ 1 

V = 0.278 x = –––––– x –––––– x –––––– x t 

2 p u 

– p i 

p v 

+ 1 

This formula uses the following parameters: 

V = capacity of the pressure expansion vessel in litres. 

Q u 

= pump output at cut-out pressure in m 3 /h. 

Q i 

= pump output at cut-in pressure in m 3 /h. 

p u 

= pressure switch cut-out pressure in bar (abs.). 

p i 

= pressure switch cut-in pressure in bar (abs.). 

p v 

= initial pressure of the pressure expansion vessel in bar (abs.). 

t = time in seconds during which the vessel can be drained without the pump cutting in. 

If V is between the capacity values of two pressure expansion vessels, the larger of the two must always be 

selected. 

If the smaller pressure expansion vessel is selected, 

the switching frequency of the pump will increase 

significantly which, in turn, will have an adverse effect 

on the pump's service life. 

If you need to discharge small amounts of water often 

without the pump cutting in, choose a greater value 

for time; the value of V, the capacity of the pressure 

expansion vessel will, accordingly, rise too. 

The pressure expansion vessel will then also work as a 

storage vessel. In this situation, we recommend using 

a flow-through Airfix vessel. 

For larger capacity vessels it is possible to connect 

more than one pressure expansion vessel in parallel. 

Instructions on how to install pressure expansion vessels for potable appliances in 

pressure boosting sets 

Stopcock 

Stopcock 

Airfix D-E 

Gas fill valve/ 

inspection 

connection 

Non-return valve 

Pump 

Reducer valve 

Pressure switch PS 




Control valve 


Stop cock 

Airfix A/D 

Pump 

Drain cock 


To the 

system 

Mains water systems, particularly those which draw 

water from an aquifer or well, have relatively high 

levels of air. Thus, the pressure expansion vessel 

must be fitted so that there is no chance of an 'air 

cushion' forming at the diaphragm. 

The pressure expansion vessel is filled with a 

controlled throughput. 

We recommend fitting a pressure regulator. 



85

Airfix D-E-B 

Price band D 

Potable water vessels for use on water supplies including unvented HWS systems and water boosting sets. The inside of the 

Airfix vessel has a special coating which prevents oxidation. The composition of the diaphragm has been designed for this range 

so that there will be no residual smell, colour or taste. By specifying Airfix you can be assured of clean water. 

The Aifix D-E-B is a floor standing and easy to install unit. For pressure boosting, drinking water, processing of fire extinguishing 

installations with a single system connection. 

Airfix D-E-B 

• Max. working pressure: 10.0 bar(g) *. 

Type 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP (F) 

Dry 

Weight 

[kg] 

10.0 bar(g) 

Order 

Code 

Airfix D-E-B 50 50 450 830 1 1 / 2" 49 1 FCAF DEB50 10B 






Airfix D-E-B 600 600 750 1840 2" 217 1 FCAF DEB600 10B 






* 16, 25 and 40 bar(g) available on request. 

Airfix D-E 

Price band D 

Potable water vessels for use on water supplies including unvented HWS systems and water boosting sets. The inside of the 

Airfix vessel has a special coating which prevents oxidation. The composition of the diaphragm has been designed for this 

range in such a way that there will be no residual smell, colour or taste. By specifying Airfix you can be assured of clean water. 

The Airfix D-E is a floor standing and easy to install unit. Featuring a 100% 'flow through' vessel design with two flange 

connections and an exchangeable butyl diaphragm. Airfix D-E vessels are fitted as standard with an electronic diaphragm 

rupture sensor. 

Airfix D-E 


Type 

Volume 

[l] 

Dimensions Flanges * 

(2x) 

Ø H. 

[mm] [mm] 

Dry 

Weight 

[kg] 

10.0 bar(g) 

Order 

Code 

Airfix D-E 50 50 450 836 DN 40 60 1 FCAF DE 050 


Airfix D-E 120 120 450 1271 DN 40 80 1 FCAF DE 120S 



Airfix D-E 300 300 550 1827 DN 40 150 1 FCAF DE300 




Airfix D-E 1600 1600 1000 2663 DN 80 550 1 FCAF DE1600 



* A ccording to EN1092-1 PN16. 



4 

Airfix D-E-L 

Price band D 

The Airfix D-E-L is a floor standing and easy to install unit. Featuring a 100% 'flow through' vessel design with a double system 

connection and has an exchangeable butyl diaphragm. Airfix D-E-L vessels are fitted as standard with an electronic diaphragm 

rupture sensor. 

Airfix D-E-L 


Type 

Volume 

[l] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

Dry 

Weight 

[kg] 

10.0 bar(g) 

Order 

Code 

Airfix D-E-L 50 50 450 845 G 1 1 / 4" 60 1 FCAF DEL50 10B 









87

5. 


potable installations 

Flamco’s Prescor B safety valves protect potable water systems from 

exceeding the maximum design operating pressure. Once the set 

pressure has been reached the safety valve will open, venting water, to 

prevent a further rise in pressure. 

Prescor B safety valves are produced in a range of sizes and pressure 

ratings. The materials and construction of Flamco valves 

are of the highest quality to ensure total safety and peace of mind. 

They can be used in combination with any boiler system. 


Accessories for potable water installations 

5 


Safety valves 

Water shock arrestor 

Removable Vessel accessories diaphragm 

Prescor B 

• For closed potable water systems. 

• High blow-off capacity because of 

‘pop’effect. 

• Operating pressure: 6/8/10 bar. 


• Solid brass housing. 

Flexofit S 

• For absorbing water shock in sanitary 

water systems. 



• Chromium-plated brass housing. 

• KIWA certified. 

T-Piece 

• For use with Flexofit S. 

• With a union and a rubber sealing 

ring for connection to a washing 

machine cock. 

• Chromium-plated brass. 

• KIWA certified. 

MB Wall mounting bracket 

• For mounting 8 - 25 litres 

Flexcon and Airfix A/D vessels. 

• With slot in which the clenchring 

perfectly fits. Tightening two 

bolts is all it takes to firmly mount 

the vessel. 

• Straps are available for mounting 

vessels without clench rings. 

• MB 3: With quick snap spring and 

adapter. 

SB-A Hose 

• For easily mounting expansion 

vessels without clench ring 

(i.e. Airfix P from 2 up to 35 litre). 

• To be used in combination with MB 2 

wall mounting bracket. 

• Tightened with cross-head. 

Flexcon DT 

• For easily disconnecting Flexcon 

and Airfix vessels from 2 up to 25 

litre. 

• With rubber grip. 

Vessel Carrier 

• Handy tool for transporting old expansion 

vessels from 2 up to 25 litre. 

• Avoids spillage of water during 

transport. 



89

Prescor B safety valves 

Price band C 

For potable water installations. 

Prescor B 

Type 

Set 

pressure 

[bar(g)] 


Inlet 

Outlet 

Capacity 

[kW] 

Order 

Code 

Prescor B 1 / 2 6.0 1 

/ 2" F 1 

/ 2" F 75 50 FCBP 05 

Prescor B 1 / 2 8.0 1 

/ 2" F 1 

/ 2" F 75 50 FCBP 05/8 

Prescor B 1 / 2 10.0 1 

/ 2" F 1 

/ 2" F 75 50 FCBP 05/10 

Prescor B 3 / 4 6.0 3 

/ 4" F 3 

/ 4" F 150 40 FCBP 75 

Prescor B 3 / 4 8.0 3 

/ 4" F 3 

/ 4" F 150 40 FCBP 75/8 

Prescor B 3 / 4 10.0 3 

/ 4" F 3 

/ 4" F 150 40 FCBP 75/10 

Nr. 0343 

Flexofit S watershock arrestor 

Absorbs the back flow when waterdemand is suddenly stopped. Helps prevent damage to pipes and fittings caused by water 

hammer. 


Flexofit S 

Type 

Initial 

pressure 

[bar(g)] 

Dimensions Connection Order 

Code 

Ø 

[mm] 

H. 

[mm] 

Flexofit S 1 / 2 2 83 102 1 

/ 2" M 20 FC FLEXOFIT 

Flexofit S 1 / 2 with T-fitting 2 83 130 3 

/ 4" F x 20 24989 

3 

/ 4" M 

T-fitting Flexofit S 

Specially made to mount a Flexofit watershock arrestor quickly and easily to a standard washing 

machine fitting. 

Type Connection Order 

Code 

T-fitting Flexofit S 3 

/ 4" F x 1 / 2" F x 3 / 4" M 1 24985 

Vessel accessories 

Price band C 

Vessel carrier 

An efficient valve which makes it very easy and safe to handle or transport the exchanged vessel. 

• Easy to use, mount and unmount (for multiple use). 

• Prevents spilling of installation water in your transporter or at home with the customer. 

• The vessel can be handled with just one hand. 

Type Connection Application Order 

Code 

Vessel carrier 3 

/ 4" Flexcon/Airfix 2 - 25 100 27902 


Accessories for potable water installations 

5 

MB 

For mounting Flexcon and Airfix vessels of 8 - 25 litre. 

Comes with a slot in which the Flexcon vessel clamp ring fits precisely. Tightening the two bolts is all that is needed to make a 

sturdy connection. 

• Material: DC01 A-m, zinc coated. 

• Connection to the wall with two Ø8 plugs and two Ø6 screws with hexagon head (wrench 10). Plugs and screws are 

included. 

• Connection of the vessel to the MB by means of two M5 bolts with cross head. 

• Separately available are sets of 5 hose clamps for connection vessels without clench ring (max. size approx. Ø 325 mm). 

• MB 3: With spring and adapter for easy mounting. 

Type Dimensions Order 

Code 

W. 

[mm] 

H. 

[mm] 

Vessel support MB 2 94 113 25 FC BAND 

Vessel support MB 3 94 113 25 27903 

SB-A 

Type Application Order 

Code 

SB-A 

Tie for fitting Airfix P vessels, to 

be combined with MB-2 

5 27914 

Flexcon DT 

For disconnecting Flexcon and Airfix vessels. 

A 

Type Application Dimension 

A 

[mm] 

Flexcon DT Flexcon/Airfix 2 - 25 350 1 27925 

Order 

Code 



91

6. 

Calorifi ers, Storage 

Vessels and Industrial 

solutions 

Flamco’s range of high-quality storage vessels and calorifiers for 

drinking water, air-conditioning and heating systems. The calorifiers can 

be used with all modern heating systems, whilst the Twin Coil units are 

ideal for use with solar panels and secondary renewable heat sources. 

Made from top-quality materials and insulated according to the most 

stringent environmental guidelines, they have a high heat output and 

they are highly energy-efficient. 



6 

Selection guide 

Water heaters 

(mains-water systems) 

Storage vessels 

(heating and chilled systems) 

Industrial solutions 

Supastor SS Indirect unvented 

cylinders 

• For potable water installations. 

• 150 - 2.000 litres. 

• Max. operating pressure (cylinder/ 

coil): 6 / 16 bar(g). 

• Single integrated heating coil. 

PS 

• For hot and cold water storage. 

• 200 - 2,000 litres. 


• Steel storage tanks. 

Bespoke stainless steel 

industrial cylinders 

• For industrial use. 

Supastor SS Direct unvented 

cylinders 

• For potable water installations. 

• 120 - 1,000 litres. 


coil): 6 / 16 bar(g). 


• For hot and cold water storage. 

• 120 - 1,000 litres. 


• Stainless steel storage tanks. 

Stainless steel single coil 

water heaters 


• 1,500 - 5,000 litres. 


coil): 6 / 12 bar(g). 

• Single integrated heating coil. 

'Combi' vessels 

(mains-water systems) 

Stainless steel twin coil 

water heaters 


• 1,500 - 5,000 litres. 


coil): 6 / 12 bar(g). 

• Two integrated heating coils. 

Supastor SS Solar unvented 

cylinders 

• For solar installations. 

• 210 - 1.000 litres. 


coil): 6 / 16 bar(g). 

• Two Integrated heating coils. 

Stainless steel triple coil 

water heaters 


• 1,500 - 5,000 litres. 


coil): 6 / 12 bar(g). 

• Three Integrated heating coils. 

Thermal Fluid Treatment 

System 

• Revolutionary service for the 

maintenance and safety of thermal 

fluids. 

• Elimination of system downtime. 

• Extended fluid life up to 10-fold. 

• Reduced carbon footprint, waste 

and risk. 



93

Supastor direct and indirect unvented cylinders 

Supastor direct and indirect unvented cylinders have 

been specially designed for the UK housing market, 

being compact, easy to install with ‘in-line’ 

connections and are supplied with all necessary 

controls. 

Available in nominal capacities from 120 litres to 

1,000 litres *, they are suitable for both domestic 

dwellings and small commercial premises, giving an 

energy efficient and fast method of providing hot 

water. 

* For larger commercial applications refer to the Flamco Duo range. 

Supastor direct unvented cylinders 

including kit 

Supastor indirect unvented cylinders 

including kit 



6 

The interior of the steel cylinder is enamelled to DIN 

4753/part 3. The cylinder’s exterior is prime coated 

and covered by a 35 mm CFC free polyurethane foam 

insulation with an outer white, easy to clean 5 mm 

plastic jacket. The cylinders have a low tendency to 

calcination due to the enamelling. 

Supastor direct and indirect unvented cylinders are 

WRC tested and approved. 

They have three year cylinder warranty and one year 

warrenty for electrical parts and components (subject 

to installation requirements). 

Supastor accessories 

Direct unvented kit: 

• Expansion vessel. 

• Pressure reducing valve set at 

3 bar with in-line strainer. 

• Safety Group consisting of: 

• Expansion relief valve 

• Tundish 

• Single check valve. 

EXPANSION VESSEL 

IMMERSION HEATER 

Indirect unvented kit: 

• 12 liter Flexcon expansion vessel. 

• Pressure reducing valve set at 

3 bar with in-line strainer. 

• 2 port motorised valve*. 

• Safety Group consisting of: 

• Expansion relief valve 

• Tundish 

• Single check valve. 

* Note: All components must be fitted. If the system is to be 

fitted with a 3 port valve, the 2 port valve supplied by Flamco 

must still be fitted. 

R 3 

IMIT COMBINED 

THERMOSTAT & SAFETY 

RELAY 

2 PORT VALVE 

COMBINED TEMPERATURE & 

PRESSURE RELIEF VALVE 

TUNDISH 

SAFETY GROUP C/W 

NON RETURN VALVE 

PRESSURE REDUCING 

VALVE PRE-SET 



95

Supastor direct unvented cylinders 

Supastore direct unvented cylinders are supplied 

complete with unvented kit, temperature/pressure 

valve and two immersion heaters. 

Hot water supply 

Temperature / Pressure relief valve 

Immersion heater 

Steel cylinder 

Polyurethane foam insulation 


Cold water inlet 

Supastore direct 



6 

Supastor indirect unvented cylinders 

Supastore indirect unvented cylinders are supplied 

complete with unvented kit, temperature/pressure 

valve, a thermostat and one immersion heater. 

Hot water supply 

Temperature / Pressure relief valve 

Steel cylinder 

MG Anode 

Polyurethane foam insulation 

Thermostat 

Flow 



Return 

Supastore indirect 



97

Supastor SS Direct unvented cylinders 

Direct unvented cylinders for potable water installations. Economical, high performance, stainless steel vessels for hot and cold 

water storage. Tanks for use in all closed circuit water supply systems, demand satisfied by storage volume. 

Supastor direct unvented cylinders have been specially designed for the UK market, being compact and easy to install with 'inline' 

connections and are supplied with all necessary controls. 

Supastor Direct (including kit) 

Fluid Flow Sequence: 

• Mains water isolation valve (not supplied). 

• 3 bar(g) pressure reducing valve. 

• Safety group (6 bar(g) expansion relief valve c/w non return valve). 


• Drain valve (not supplied). 

• Stainless Supastor hot water calorifier. 

Type 

Volume 

[l] 

Ø 

[mm] 

Dimensions Weight 10.0 bar(g) 

H. 

[mm] 

Dry 

[kg] 

Normal full 

[kg] 

Supastor Direct 120 120 550 977 20.8 141 1 FC DIR SS 120 



Supastor Direct 210 210 550 1569 33 243 1 FC DIR SS 210 






Order 

Code 



6 

Technical specifications Supastor Direct 

General technical specifications: 

• T&P tapping: ¾". 

• T&P pressure setting: 7 bar(g). 

• T&P temperature setting: 95 °C. 

• Expansion relief setting: 6 bar(g). 

• Electrical Heaters: 2 x 3 kW 230v/50Hz Immersion Heater (factory fitted). 

Insulation is interlocked polystyrene to allow for inspection of cylinder if required. 

With the exception of 800 and 1,000 litres cylinders that utilise foam jackets. 

Specifications 

Supastor Direct 

120 150 180 210 250 300 500 800 1000 

Electrical heater rating [kW] 3 3 3 3 3 3 3 3 3 

Re-heat times 2x3 kW * [mins.] 34 46 56 69 80 101 159 260 318 

Heat up times ** [mins.] 63 78.7 94.4 101.1 131.1 157.3 262.2 419.6 524.5 

Expansion vessel [l] 12 12 12 12 12 12 24 35 35 

* 82 °C supply. 

** From cold. 

Selection Guide for Direct * Cylinders 

* In areas with a high concentration of Chlorine (200 ppm or above) additional protection of the cylinder is required with an 

electronic anode. This is an optional extra and is not reflected in the pricing. 

Property Type 

(bedsit) 

Cylinder size 

[l] 

1/2 beds with 1 bath / shower 120 

3 beds with 1 bath / shower 150 or 180 


2/3 beds with 2 baths / showers 210 

4/5 beds with 2 baths / showers 210 or 250 

Sports club, Restaurant etc. 300 or 500 

Hotels, Schools etc. 800 or 1000 

* In areas with a high concentration of Chlorine (200 ppm or above) additional protection of the cylinder is required with an electronic anode. 

This is an optional extra and is not reflected in the pricing. 



99

Supastor Indirect unvented cylinders 

Indirect unvented cylinders for potable water installations. Economical, high performance, stainless steel vessels for hot and cold 

water storage. Tanks for use in all closed circuit water supply systems, demand satisfied by storage volume. 

Supastor indirect unvented cylinders have been specially designed for the UK market, being compact, easy to install with 'in-line' 

connections and are supplied with all necessary controls including a 2 port motorised valve. 

Supastor Indirect (including kit) 

Fluid Flow Sequence: 

• Mains water isolation valve (not supplied). 

• 3 bar(g) pressure reducing valve. 

• Safety group (6 bar(g) expansion relief valve c/w non return valve). 


• Drain valve (not supplied). 

• Stainless Supastor hot water calorifier. 

Type 

Volume 

[l] 

Ø 

[mm] 

Dimensions Weight 10.0 bar(g) 

H. 

[mm] 

Dry 

[kg] 

Normal full 

[kg] 

Supastor Indirect 120 120 550 976 23 143 1 FC IND SS 120 






Supastor Indirect 500 500 734 1823 68.5 569 1 FC IND SS 500 



Order 

Code 



6 

Technical specifications Supastor Indirect 

General technical specifications: 


• T&P pressure setting: 7 bar(g). 


• Expansion relief setting: 6 bar(g). 

• Electrical Heater: up to 500 litres 3 kW, 800 - 1,000 6 kW 230v/50Hz Immersion Heater (factory fitted). 

• Max. primary pressure (coil): 16 bar(g). 

Insulation is interlocked polystyrene to allow for inspection of cylinder if required. 

With the exception of 800 and 1,000 litres cylinders that utilise foam jackets. 


SS Indirect 

120 150 180 210 250 300 500 800 1000 

Electrical heater quantity 1 1 1 1 1 1 1 2 2 

Electrical heater rating [kW] 3 3 3 3 3 3 3 3 3 

Re-heat times * [mins.] 17 20 25 22 24 20 31 31 40 

Heat up times ** [mins.] 29 31 37 27 30 25 38 40 49 

Primary flow rate boiler [l/m] 25 34 34 42 42 42 67 92 92 

Primary coil resistance [mbar] 36 76 76 172 188 475 292 1528 695 

Continuous output [l/hr] 409 438 428 572 624 897 959 1528 1479 

Coil rating [kW] 21.8 23.3 22.8 30.5 33.2 47.8 51 81.3 78.7 

Expansion vessel [l] 12 12 12 12 12 12 24 35 35 


** From cold. 

Selection Guide for Indirect Cylinders 

Property Type 

(bedsit) 

Cylinder size 

[l] 

1/2 beds with 1 bath / shower 120 









101



Type 

Volume 

[l] 

Dimensions Weight Order 

Code 

H. 

[mm] 

Ø 

[mm] 

Dry 

[kg] 

Normal full 

[kg] 

SS Solar 210 210 1568 555 43 253 1 FC SOLSS 250+KIT 



SS Solar 500 500 1823 734 75.5 576 1 FC SOLSS 500+KIT 

SS Solar 800 800 1960 950 122.9 923.4 1 FC SOLSS 800+KIT 




6 

Technical specifications SS Solar 


• T&P pressure setting: 7 bar. 


• Max. primary pressure (coil): 16 bar. 

Insulation is interlocked polystyrene to allow for inspection of cylinder if required, with the exception of 800 and 1,000 litres 

cylinders that utilise foam jackets. 


SS Solar 

210 250 300 500 800 1000 

Electrical heater quantity 1 1 1 1 2 2 

Electrical heater rating [kW] 3 3 3 3 6 6 

Primary re-heat times * [mins.] 17 21 23 20 23 30 

Primary heat up times ** [mins.] 22 26 30 25 30 37 

Primary flow rate boiler [l/m] 42 42 59 67 92 92 

Primary resistance [mbar] 222 222 398 480 994 994 

Primary continuous output [l/hr] 710 717 769 1451 2050 1983 

Primary coil rating [kW] 37.8 38.2 40.9 77.2 109.1 105.6 

Expansion vessel [l] 12 12 12 24 35 35 


** From cold. 

Selection Guide for Supastor SS Solar 

Property Type 

(bedsit) 

Cylinder size 

[l] 








103

Bespoke stainless steel water heaters 

• Typical cylinder shell max. pressure rating: 6 bar(g). 

• Typical cylinder shell max. temperature rating: 95 °C. 

• Immersion heater connections quantity: 2. 

• Coil maximum temperature rating: 12 bar(g). 

• Insulation: 50 mm Polyurethane foam. 

ICIM Certification no. 4877/0 

Designed in accordance with BS EN ISO 9001:2000 

Stainless steel single coil industrial cylinders 

Volume 

[l] 

Ø 

[mm] 

Dimensions 

H. 

[mm] 

Immersion 

heaters (2) 

(BSP F) 


(BSP F) 

Connections 

Hot water outlet 

(BSP F) 

Primary coil 

(BSP F) 

1500 1060 2400 2 x 2" 2" 2" 2" 

2000 1210 2450 2 x 2" 2" 2" 1 1 / 2" 

3000 1410 2550 2 x 2" 2" 2" 1 1 / 2" 

4000 1510 2870 2 x 2" 2 1 / 2" 2 1 / 2" 2" 

5000 1710 2920 2 x 2" 2 1 / 2" 2 1 / 2" 2" 

Stainless steel twin coil industrial cylinders 

Volume 

[l] 

Ø 

[mm] 

Dimensions 

H. 

[mm] 

Immersion 

heaters (2) 

(BSP F) 


(BSP F) 

Connections 


(BSP F) 

Primary coil 

(BSP F) 

1500 1060 2400 2 x 2" 2" 2" 2" 

2000 1210 2450 2 x 2" 2" 2" 1 1 / 2" 

3000 1410 2550 2 x 2" 2" 2" 1 1 / 2" 

4000 1510 2870 2 x 2" 2 1 / 2" 2 1 / 2" 2" 

5000 1710 2920 2 x 2" 2 1 / 2" 2 1 / 2" 2" 

Stainless steel triple coil industrial cylinders 

Volume 

[l] 

Ø 

[mm] 

Dimensions 

H. 

[mm] 

Immersion 

heaters (2) 

(BSP F) 


(BSP F) 

Connections 


(BSP F) 

Primary coil 

(BSP F) 

1500 1060 2400 2 x 2" 2" 2" 2" 

2000 1210 2450 2 x 2" 2" 2" 1 1 / 2" 

3000 1410 2550 2 x 2" 2" 2" 1 1 / 2" 

4000 1510 2870 2 x 2" 2 1 / 2" 2 1 / 2" 2" 

5000 1710 2920 2 x 2" 2 1 / 2" 2 1 / 2" 2" 



6 


Price Band D 

Economical, high performance, stainless steel vessels for hot and cold water storage. Tanks for use in all closed circuit water 

supply systems, demand satisfied by storage volume. Assembly friendly and maintenance free. 



Stainless 120 - 1000 

Type 

Volume 

[l] 

Ø 

[mm] 

Dimensions 

Dry 

Weight 

[kg] 

10.0 bar(g) 

SS 120 120 555 977 20.8 1 FC DIR 120SS BV 

SS 150 150 555 1167 23.5 1 FC DIR 150SS BV 

SS 180 180 555 1347 26.5 1 FC DIR 180SS BV 

SS 210 210 555 1569 33 1 FC DIR 210SS BV 

SS 250 250 555 1759 35.5 1 FC DIR 250SS BV 

SS 300 300 606 1750 42 1 FC DIR 300SS BV 

SS 500 500 734 1823 59 1 FC DIR 500SS BV 

SS 800 800 950 1960 100 1 FC DIR 800SS BV 

SS 1000 1000 950 2360 115 1 FC DIR 1000SS BV 

H. 

[mm] 

Order 

Code 



105

PS storage vessels 

PS 50 - 850 

Price band F 

Mild steel buffer vessels suitable for water storage in heating and chilled water installations. 

Reduced boiler heater usage and improved system efficiency through the storage of large 

quantities of water. Externally painted, inside uncoated. Capable of connection to additional heat 

sources. 



Type 

Volume 

[l] 

Dimensions * 

Ø 

[mm] 

H. 

[mm] 

Dry 

Weight 

[kg] 

Order 

Code 

PS 200 200 480 1300 51 1 FCBV PS200 

PS 500 500 650 1640 83 1 FCBV PS500 

PS 750 750 750 1970 124 1 FCBV PS750 

* Dimensions without insulation. 

Connection diagram PS 50 - 850 

G1¼ ** 

G1½ * 

G1½ * 

G¾ 

G1½ * 

G1½ * 

G1½ * 

G¾ 

G1½ * 

C 

G1½ * 

G1½ * 

F 

D 

A 

C 

B 

F 

G¾ 

Type 

Systemconnections 

F 

[mm] 

Distance from floor to connection 

PS 200 8 230 495 690 765 1030 

PS 500 8 285 635 810 985 1335 

PS 750 8 320 755 970 1185 1620 

* PS 200 - 500 connections: G 1 ¼". 

** PS 750 connections: G 1 ½". 

D 

[mm] 

B 

[mm] 

A 

[mm] 

C 

[mm] 



6 

PS 1000 - 2000 

Price band F 

Mild steel buffer vessels suitable for water storage in heating and chilled water installations. 

Reduced boiler heater usage and improved system efficiency through the storage of large 

quantities of water. Externally painted, inside uncoated. Capable of connection to additional heat 

sources. 



Type 

Volume 

[l] 

Dimensions * 

Ø 

[mm] 

H. 

[mm] 

Dry 

Weight 

[kg] 

Order 

Code 

PS 1000 (Ø 850) 1000 850 2000 172 1 FCBV PS1000 

PS 1500 1500 1000 2320 252 1 FCBV PS1500 

PS 2000 2000 1100 2350 282 1 FCBV PS2000 

* Dimensions without insulation. 

Connection diagram PS 1000 - 2000 

G2 * 

G2 * 

G¾ 

G2 * 

G2 * 

G2 * 

G¾ 

G2 * 

G2 * 

C 

C 

G2 * 

G2 * 

F 

D 

A 

B 

F 

G¾ 

G1 ** 

Type 

Systemconnections 

F 

[mm] 

Distance from floor to connection 

PS 1000 (Ø 850) 8 360 795 1060 1225 1660 

PS 1500 8 390 910 1165 1420 1940 

PS 2000 8 400 920 1175 1430 1950 

* PS 1000 connection: G 1 ½". 

** PS 1500 - 2000 connection: G 1 ¼". 

D 

[mm] 

B 

[mm] 

A 

[mm] 

C 

[mm] 



107

7. 

Automatic air vents 

and dirt separators 

Systems in which the water is properly de-aerated and free of 

contamination are more efficient, produce less noise and have a longer 

service life. Our products use proven technology to extract air and dirt 

particles from the water, i.e. coalescence, flow velocity reduction and 

pressure drop. 

Regardless of whether in a domestic environment or commercial 

installations with large heating or cooling systems, Flamco’s range 

of automatic air vents and dirt separators provide the most efficient 

solution. 



7 

Selection guide 

Micro-bubble air separators 

Floatvents 

Air and dirt separators 

Flamcovent 

• Air separator using the 

principle of coalescence. 

• Threaded connections from 

22 mm - 2". 

• Can be installed in vertical 

pipes (Flamcovent V), too. 

Flamcovent Solar 




22 mm - 1 1 /2". 


pipes (Flamcovent Solar V), too. 

• Manually-operated air separator for 

solar installations with or without the 

addition of glycol. 

• Including insulation. 

Flamcovent S/F 



• With welded or flanged connections. 

• For commercial systems. 

• Steel model. 

Air separators for high flow 

rates 

Flexair G 

• Tangential air separator. 


1" - 2". 

• Designed for high flow rates. 

Flexvent 

• Automatic floatvent. 

• 1 /8" - 3 /4" connections. 

• For household use. 

Flexvent H 

• Automatic floatvent. 

• Right-angled 1 /2" connection for 

simple connection to the radiator. 

• For household use. 

Flexvent Top 

• Automatic high-yield floatvent. 

• 1 /2" connection with optional 

valve housing. 

• For commercial systems. 

Flexvent Super 

• Automatic high-yield floatvent. 

• 1 /2” connection with optional 

valve housing. 

• Brass housing. 

• For industrial systems. 

Flexvent Top Solar 

• Automatic floatvent with ball valve. 

• Min./max. inlet temperature: 

-30 °C up to 180 °C. 

Flamcovent Clean 

• Air/dirt separator using the 



22 mm - 1 1 /2". 

• Brass model. 

Flamcovent Clean S/R 

• Air/dirt separator using the 


• With welded or grooved 

connections. 


Dirt separators 

Flamco Clean 

• Dirt separator using the 



22 mm - 2". 


pipes (Flamco Clean V) too. 

Flamco Clean S/F 

• Dirt separator using the 


• For large commercial systems. 

• With welded or flanged connections. 


Flexair S/F 

• Tangential air separator. 

• Welded or flanged connections. 

• For pipe diameters from DN 25 

- DN 600. 

• Designed for high flow rates. 

Pressure Step degasser 

Flamco PSD 

• Side stream vacuum degasser. 

• For active air removal from water 

based thermal systems. 

• With turbo feature for initial setup 

and configurable running interval. 



109

Air in central-heating systems 

Air in a central-heating system leads to: 

• Irritating noise. 

• Loss of heat from radiators. 

• Corrosion. 

• Damage to the circulation pump. 

• Reduced system service life. 

• Increased energy consumption. 

• Higher maintenance costs. 

Possible causes of air in central-heating systems 

To prevent or get rid of air problems in a system, 

it is important to understand the causes: 

• Air in the system prior to filling. 

• Air enters the system during filling. 

• Air in the water with which the system 

is filled. 

• Air dissolved in the system water. 

C Normal dm³ air per 1,000 kg of water 

T Temperature [°C] 0 

P 

Pressure [bar (g)] 

The presence of dissolved air in water can be explained through 

Henry's law. This says: C = K x P 

C = concentration of the dissolved air 

K = absorption factor (depending on the temperature) 

P = pressure 

As the diagram shows, the air that can be dissolved in the water 

depends on both the temperature and the pressure. When the 

temperature increases or the pressure drops, dissolved air in the 

water is released. 



7 

Henry's law in a central-heating system 

Very high temperatures can occur at the boiler walls. 

Aerated water can release tiny bubbles here. These 

'micro-bubbles' dissipate in other parts of the centralheating 

system at low temperatures if they are not 

removed immediately. If the micro-bubbles are 

immediately removed behind the boiler, the system 

water is free of air (unsaturated). Air from other parts 

of the system can dissolve and be absorbed by this 

water. This absorption effect can be exploited to 

coalesce all the free air in a system and help the air 

out of the system with the boiler/Flamcovent 

absorption air separator combination. This venting 

procedure is a process that continues until only 

unsaturated water, which can absorb more air remains. 

Air volume [dm³] released from 1,000 kg water 


T T Temperature [°C] [°C] 



T T Temperature [°C] [°C] 

P P Pressure [bar [bar (g)] (g)] 

P P Pressure [bar [bar (g)] (g)] 

Henry's law allows us to calculate how much dissolved 

air will be released from the water if it is heated up, for 

example from 20 °C to 80 °C. 

If the pressure decreases or the temperature increases, 

dissolved air will escape. If the temperature decreases 

or the pressure increases, air bubbles will be absorbed 

by the water. 



111

The best air separator in every situation 

The mode of operation of the Flamcovent is based 

on a special process of separating gases from fluid 

(water). 

The benefits of Flamcovent: 

• Even the smallest micro-bubbles adhere to the 

PALL rings, separating them from the system water. 

• The air chamber is conical, so the greatest possible 

distance can be maintained between the water level 

and the vent valve. 

• The vent valve with regulating screw can be shut off. 

Transmission 

mechanism. 

Air chamber. 

Vent valve. 

Float gauge. 

Housing (brass). 

Cover plate. 

Emergency stop 

PALL rings. 

Mode of operation 

The water flows through and around each of the PALL 

rings so that each gaseous particle comes 

into contact with the surface of the PALL ring, 

to which it will adhere. 

The flow rate of the water decreases as a consequence 

of the rise in the discharge cross-section. 

Air bubbles can rise through it to the air chamber. The 

float gauge, float mechanism and vent valve remove air 

that has been separated from the water in the system. 



7 


In solar thermal systems, steam (vapour) may arise 

due to the high temperatures involved. If a floatvent 

is in direct communication with the vapour, the float 

will not close off the vent (i.e. the vent floats on the 

water, not the vapour). 

The Flamcovent Solar is a type of through-flow air 

separator in which the vent head cannot be 

disconnected from the system. That is why the 

Flamcovent Solar has a manual vent, so the system will 

not boil dry when vapour is created. 

FLAMCOVENT 

SOLAR 

FLAMCOVENT 

SOLAR V 

FLAMCOVENT ECOPLUS 

FLAMCOVENT ECOPLUS V 

FLAMCOVENT 

FLAMCOVENT V 



113

Determining the appropriate size of 


The information below is applicable to heating and cooling systems. The effectiveness of the Flamcovent air 

separator depends on the speed of water flowing through the system. For the best results, Flamco advises a flow 

speed of between 0.5 and 1 m/s, assuming the Flamcovent is installed in the right place in the system (with the 

lowest pressure and the highest temperature). Even at flow speeds of between 1 and 1.5 m/s, the vent’s function 

is still adequate. Higher speeds (above 1.5 m/s) are not recommended. In such cases, a Flamcovent with a 

greater connection diameter should be used with adapters, in order to reduce the water speed inside the 

Flamcovent. 

2" 

Connection 

1½" 

1¼" 

1" 

¾" 

v=0,5 m/s 

v=1 m/s 

v=1,5 m/s 

v=3 m/s 

1 2 3 4 5 6 7 8 9 10 12 1416 

Flow (m 3 /h) 

Connection 

600 

500 

400 

350 

300 

250 

200 

150 

125 

100 

80 

65 

50 

v=0,5 m/s 

v=1 m/s 

v=1,5 m/s 

v=3 m/s 

7 8 9 10 15 20 30 40 50 60 80 100 150 200 300 500 700 1000 1500 

Flow (m 3 /h) 

Flamcovent flow rate 

V = 1.0 m/s max. speed at the lowest 

point of the system. 

V = 1.5 m/s max. speed at the highest 

point of the system. 



7 

The air chamber of the Flamcovent is conical in shape. 

The advantage of this construction is that the distance 

(A) between the water level and the vent valve is larger 

than with a straight air chamber. This means that there 

is little chance of pollution 

WATER 

A 

WATER 

A 

Flamcovent air separators outperform other air separators 

Research at the Delft Technical 

University has shown that 

Flamcovent air separators 

remove all micro-bubbles from 

15 µm. This is three times 

better than comparable air 

separators. 

You will find the report at 

www.flamco.co.uk. 

Size of air bubbles (µm) 

80 

70 

60 

50 

40 

30 

20 

Flamcovent valve 

‘Regular’ vent valve 

10 

0 


Air separator B 

In order to vent the system in the best possible way, the Flexair or Flamcovent air separator 

must be fitted immediately behind the boiler or tempering valve in the supply line. 

Without tempering valve 

With tempering valve 

In cellar Upstairs in attic Wall-mounted boiler Upright boiler 



115

Flamco Dual Zone Flow Diversion 

Systems in which the water is sufficiently 

de-aerated and free of dirt of all kinds give a 

better yield, produce less noise and have an 

improved service life. 

Good reasons to opt for Flamco's innovative 

solutions. 

Research carried out at the University of Antwerp 

shows that our air separators remove all 

microscopic air-bubbles from 15 µm and larger and 

all dirt particles between 15 and 200 µm (normal 

spectrum of particles in a HVAC system). 

Unequalled air and dirt separation 



7 

Significant benefits and high output 

Superior performance 

The performance of our wide range of dirt separators 

can also be called best in their field. Apart from airbubbles, 

dirt particles such as grains of sand, bits of 

metal and paint or tape residue flow through every 

system. 

They can cause rust, blockages and compromised 

output. The consequences could prove costly. Such 

problems can be prevented. 

Our extensive new range of brass or steel dirt 

separators with welded, flanged or grooved 

connections offers you the best result for any 

situation. The function of Dual Zone Flow Division 

has been extensively tested by the University of 

Antwerp in Belgium. 

Seperation efficiency (%) 

35 

30 

25 

20 

15 

10 

5 

Flamco 

A 

B 

D 

Dirt separation efficiency 

Separation efficiency (%) 

40 

35 

30 

25 

20 

15 

10 

5 

Flamco 

A 

B 

C 

Air separation efficiency 

0 

12 14 16 19 22 26 30 35 41 48 56 66 

DN50, values at 1 m/s 

Particle size of magnetite (µm) 

0 

31 42 52 62 73 83 94 104 114 

DN50, values at 0.5 m/s 

Micro bubble (µm) 

Minimal loss of pressure 

If you want to remove both dirt and air from your 

system, Flamco's new inventions are just the ticket. 

Our easy-to-install device for separation of air and dirt 

from the system water is undeniably the best 

conceivable solution with minimal pressure loss and 

thus also saves on energy use. 

The advantages of Dual Zone Flow Division: 

• Maximum separation of air and dirt. 

• Better yield and a longer service life. 

• Supreme performance and minimal loss of pressure. 

• Extensive range for the home and office. 

• Innovative, economical and energy efficient. 



117

Three technologies in one 

Flamco's patented Dual Zone Flow Diversion unites 

all existing technologies to separate air and dirt 

particles from system water: coalescence, reduction 

of the flow speed and pressure reduction under the 

influence of coalescence, micro-bubbles attach 

themselves to metal and other surfaces; lowering the 

flow speed of system water allows air-bubbles to rise 

and a drop in pressure releases gases dissolved in 

fluid (Henry's Law). 

The combination of these three technologies, 

combined with optimum system flow, guarantees the 

best possible result. 



7 

How does it work 

There is a square basket with partitions fitted in the 

separator. The PALL rings in the basket have a 

relatively large surface area, so that even microbubbles 

of 15 μm can adhere to them. Dirt particles 

that are heavier than water sink to the bottom of the 

unit. 

In the rest zone, the micro-bubbles can grow and rise 

to be removed by the automatic de-aerator. 

For dirt that remains floating in the water there is a 

blow-off cock fitted under the automatic de-aerator, 

while bigger dirt particles can be removed via a tap 

on the bottom of the unit. All this happens with the 

minimum loss of pressure. 

V+ / P- 

V- / P+ 

Step 1 

Because the basket's corners are at an angle to the flow 

direction, the system water is split at the inlet. The water that 

is forced against the basket causes the pressure inside the 

basket to rise. 

Step 2 

The difference in pressure 

(higher in the basket and 

lower in the separate 

streams) means that when 

the pressure drops, a slow 

secondary stream will flow 

from the basket over the 

edges of the partitions and 

back into the quicker main 

stream. 

Step 3 

The water in the basket is fed 

along all surfaces of the PALL 

rings. Micro-bubbles and dirt 

are led to the rest zones by the 

slow secondary stream. The 

flow area on the way to the rest 

zones becomes increasingly 

large, while the pressure drops. 

- + 

FLOW (FRONT) 

- 



119


Price band C 

Flamcovent air separators are used for the total removal of air from central heating and air conditioning systems. The 

Flamcovent principle is based on the proven and effective PALL process (Patented). 



With threaded connections (Flamcovent 22 with compression connection). 

Type 

Syst. 

conn. 

BSP (F) 

Dry 

Weight 

[kg] 

Volume 

[l] 

Dimensions * 

Ø 

[mm] 

H. 

[mm] 

Order 

Code 

Flamcovent 22 22 mm 1.4 0.22 98 151 1 FCDA 22MM 

Flamcovent 3 / 4 3 

/ 4" F 1.4 0.22 88 151 1 FCDA 075 

Flamcovent 1 1" F 1.8 0.35 100 171 1 FCDA 100 

Flamcovent 1 1 / 4 1 1 / 4" F 2.4 0.48 114 192 1 FCDA 125 

Flamcovent 1 1 / 2 1 1 / 2" F 2.5 0.48 114 192 1 FCDA 150 

Flamcovent 2 2" F 2.6 0.75 131 213.5 1 FCDA 200 

* Including connections. 

Flamcovent V 

For mounting in vertical pipes. 

With compression connections (Flamcovent V ¾" with threaded connection). 

Type 

Syst. 

conn. 

Dry 

Weight 

[kg] 

Volume 

[l] 

Dimensions * 

Ø 

[mm] 

H. 

[mm] 

Order 

Code 

Flamcovent V 22 22 mm 1.9 0.4 160.5 189 1 FCDA V 22 

Flamcovent V 3 / 4 3 

/ 4" F 1.9 0.4 160.5 182 1 FVDA V 075 

Flamcovent V 1 1" F 2.95 0.5 184 204 1 FCDA V 100 

Flamcovent V 1 1 / 4 1 1 / 4" F 2.8 0.5 184 204 1 FCDA V 125 

* Including connections. 


For mounting in solar powered installations. 

With compression connection (22 mm) and Stiropor jacket for insulation. 


Type Connection Dry 

Weight 

[kg] 

Volume 

[l] 

Dimensions * 

L. x W. x H. 

[mm] 

Order 

Code 

Flamcovent Solar 22 22 mm 1.4 0.22 102 x 113 x 188 1 FCSL 22 

Flamcovent Solar 3 / 4 3 

/ 4" F 1.4 0.22 102 x 113 x 188 1 FCSL 75 

Flamcovent Solar 1 1" F 1.8 0.35 110 x 117 x 207 1 FCSL 100 

Flamcovent Solar 1 1 / 4 1 1 / 4" F 2.4 0.48 116 x 121 x 227 1 FCSL 125 



* Dimensions including insulation. 

Flamcovent Solar V 

Especially for mounting in vertical pipes in solar powered installations. 




Weight 

[kg] 

Volume 

[l] 

Dimensions * 

L. x W. x H. 

[mm] 

Order 

Code 

Flamcovent Solar V 22 22 mm 1.9 0.4 100 x 190 x 215 1 FCSL V22 

Flamcovent Solar V 3 / 4 3 

/ 4" F 2 0.4 100 x 190 x 215 1 FCSL V75 

Flamcovent Solar V 1 1" F 3.15 0.5 115 x 215 x 227 1 FCSL V100 

Flamcovent Solar V 1 1 / 4 1 1 / 4" F 2.95 0.5 115 x 215 x 227 1 FCSL V125 




7 

Flamcovent S 

With welded connections. 

Type 

Volume 

[l] 

Syst. conn. Dry 

Weight 

Dimensions * 

DN mm [kg] W. H. 

[mm] [mm] 

Order 

Code 

Flamcovent 50 S 8 50 60.3 8.0 260 472 1 FCDA S50 













* Incl. welded connection. 

Flamcovent F 

With flanged connections. 

Type 

Volume 

[l] 

Syst. conn. ** Dry 

Weight 

Dimensions * 

DN mm [kg] W. H. 

[mm] [mm] 

Order 

Code 

Flamcovent 50 F 8 50 60.3 13.1 350 472 1 FCDA F50 













* Incl. flanged connection. 

** According to EN1092-1 PN16. 

Flamcovent Adaptor 

Type 

Connection 

BSP 

Shut-off valve 

Flamcovent adaptor 1 

/ 4" F no 1 FC VENTADAPTOR 

Order 

Code 



121

Flexvent floatvents: 

reliable and easy to mount. 

The Flexvent types 3 /8", 1 /8"- 3 /8", 1 /2" and 3 /4" are 

supplied with a brass reducer to facilitate easy 

mounting and unmounting. When the floatvent is 

unscrewed from the shut-off valve, the valve will 

close automatically. Under normal circumstances, 

the Flexvent floatvent needs no maintenance. 

However, if it does need removing, the system 

need not be de-pressurized or drained, thanks to 

the shut-off valve on most Flexvent models. Due 

to the particularly compact dimensions of the 

floatvent, it is possible to install a Flexvent 

floatvent in those places in the system where air 

collects. 

Protective cap including 

expansion sealer rings to 

prevent leaks. 

Substantial distance between 

the water and the closing 

mechanism, reducing the 

chance of contamination. 

Most Flexvent floatvents are 

made of brass. 

The Flexvent H has a ½" 

right-angled connection 

which means it can be 

mounted directly on one of 

the radiator sockets. 

Mostly supplied standard 

with a shut-off valve for easy 

removal. 

Flexvent Automatic Air Vents 

The float floats on the water and keeps the venting 

valve closed. When air is collected in the floatvent, 

the water level will drop and the venting valve will be 

opened. The collected air will escape, causing 

the water level to rise and the venting valve to close. 

This process continues as long as air is collected in 

the floatvent during operation. 

The air cushion in the upper part of each Flexvent 

protects the valve seat against contamination. 

LTA air pots 

The Flamco air pot is mounted on 

rising pipes in the supply or return 

lines. In the air pot the water returns to 

a non-turbulent state and the air it 

brought with it can collect in the upper 

part. The air can be bled from the 

Flexvent mounted on top of the air pot. 



7 

FLEXVENT 

FLEXVENT H 

FLEXVENT TOP 

FLEXVENT MAX 

FLEXVENT SUPER 

FLEXVENT 

SOLAR 

FLEXVENT TOP 

SOLAR 

AIR POT 

LTA 

60 

50 

40 

30 

FLEXVENT 

SUPER / MAX 

FLEXVENT 

TOP 

FLEXVENT 

l/min. 

20 

10 

0 1 2 3 4 5 6 

bar 

Flexvent 

open 

Flexvent 

closed 

The amount of air that is allowed to 

escape through the Flexvent floatvent 

depends on the system pressure. The 

graph shows the relationship between 

the amount of air in litres/min at 15 °C 

and the system pressure. 


The cap of the Flexvent Super is conical in shape. 

The advantage of this construction is that the 

clearance between the water level and venting valve is 

at its greatest. The air-escape duct can be opened or 

closed with an adjusting screw. 

The venting valve forms an integral part of the cap, 

so that it is impossible to damage the floatvent 

mechanism from outside. 



123

Flexvent floatvents 

Price band C and D 

The compact proven design has high efficiency and guaranteed operation for heating and air conditioning. The water within the 

installation contains air which can form corrosion and reduce the thermal transfer. A Flexvent is fitted at places where the air 

collects. Float operated, the air is collected in the Flexvent causing the float to drop and open the air release valve. When the air 

is eliminated the float rises and closes the valve. 

Flexvent 

Flexvent ½" Flexvent 3 / 8" Flexvent 1 / 8" 

Type Dimensions Connection 

BSP 

Ø 

H. 

[mm] [mm] 

Shut-off valve 

Flexvent 3 / 8 30 78 R 3 / 8" M yes 50 FC FLEXVENT 

Flexvent 1 / 8 30 67 R 1 / 8" M no 50 FC VENT 18 

Flexvent 1 / 2 30 75.5 R 1 / 2" M yes 50 FC VENT 12 

Flexvent H 


BSP 

Ø Ø, H. 

[mm] conn. [mm] 

incl. 

[mm] 

Shut-off 

valve 

Order 

Code 

Flexvent H 1 / 2 Nicle plated 31 50.5 70 R 1 / 2" M no 50 FC VENT H 

Flexvent H 1 / 2 White 31 50.5 70 R 1 / 2" M no 50 FC VENT HW 

Flexvent Top 

Type Dimensions Connection Shut-off 

valve 

Ø H. 

[mm] [mm] 

Order 

Code 

Flexvent Top 52 86 Rp 1 / 2" no 25 FC VENT TOP 

Flexvent Top white 52 86 R 3 / 8" yes 20 FC VENT TOP W 

Order 

Code 


For commercial heating and air conditioning systems. A high capacity unit which removes rising 

air bubbles through a specially designed float operated valve. 


BSP 

Ø H. 

[mm] [mm] 

Shut-off 

valve 

Order 

Code 

Flexvent Super 1 / 2 73 119 1 

/ 2" F no 1 FC VENTSUPER 



7 


With ball valve. 


BSP 

Ø H. 

[mm] [mm] 

Shut-off 

valve 

Order 

Code 

Flexvent Top Solar 3 / 8 30 75.5 G 3 / 8" no 1 FC VENT TOP SOL 

Flexvent Adaptor 

Type Connection BSP Shut-off valve Order 

Code 

Flexadaptor 1.4" M no 1 FC FLEXADAPT 

Intake Preventor Vent P 


BSP 

Ø H. 

[mm] [mm] 

Shut-off 

valve 

Order 

Code 

Vent P 16 28 M 12 x 1 - 25 27755 

Flexair air separators 

Price band D 

Flexair air separators are designed for the removal of air from heating and air conditioning systems by the efficient centrifugal 

principle,coupled with the Flexvent equipment. 

Flexair G 

With threaded connections. 

Type 

Syst. 

conn. 

BSP (F) 

Dry 

Weight 

[kg] 

Volume 

[l] 

Dimensions * 

Ø 

[mm] 

H. 

[mm] 

Order 

Code 

Flexair 1 G 1" F 1.8 1.2 284 275 1 FCAS 25G 

Flexair 1 1 / 4 G 1 1 / 4" F 2.0 1.2 297 275 1 FCAS 32G 

Flexair 1 1 / 2 G 1 1 / 2" F 2.5 1.5 330 285 1 FCAS 40G 

Flexair 2 G 2" F 3.0 2.3 352 305 1 FCAS 50G 

* Incl. threaded connection. 

Flexair S 


Type Syst.conn. Dry 

weight 

Volume 

[l] 

Dimensions * 

DN mm [kg] 

Ø H. 

[mm] [mm] 

Order 

Code 

Flexair 32 S 32 42.4 1.8 1.2 262 275 1 FCAS 32S 






125

Flexair S 


Type Syst. conn. Dry 

weight 

Volume 

[l] 

Dimensions * 

DN mm [kg] 

Ø H. 

[mm] [mm] 

Order 

Code 

Flexair 65 S 65 76.1 10 17 400 448 1 FCAS 65S 













Flexair F 


Type Syst. conn. ** Dry 

weight 

Volume 

[l] 

Dimensions * 

DN mm [kg] 

Ø H. 

[mm] [mm] 

Order 

Code 

Flexair 65 F 65 185 17 17 487 448 1 FCAS 65F 














Flamcovent Clean microbubble air separators 

Price band C 

The Flamcovent Clean has been specially designed to separate solid particles as well as air from a heating or chilled installation. 

Flamcovent Clean 

With threaded connections (Flamcovent 22 with compression connection). 

Type Dimensions * Syst. 

conn. 

Ø 

H. 

[mm] [mm] 

Order 

Code 

Flamcovent Clean 22 115 283 22 mm 1 FC DAC 22 MM B 

Flamcovent Clean 3 / 4 90 283 3 

/ 4" 1 FC DAC 075 B 

Flamcovent Clean 1 104 315 1" 1 FC DAC 100 B 

Flamcovent Clean 1 1 / 4 114 345 1 1 / 4" 1 FC DAC 125 B 

Flamcovent Clean 1 1 / 2 114 345 1 1 / 2" 1 FC DAC 150 B 

* Incl. connection. 



7 

Flamcovent Clean S 


Type 

Volume 

[l] 

Syst.conn. Dry 

Weight 

Dimensions * 

DN mm [kg] Ø H. 

[mm] [mm] 

Order 

Code 

Flamcovent Clean 50 S 10 50 60.3 9.5 260 560 1 FC DAC 50S 

Flamcovent Clean 65 S 10 65 76.1 9.7 260 560 1 FC DAC 65S 

Flamcovent Clean 80 S 33 80 88.9 18 370 756 1 FC DAC 80S 












Flamcovent Clean F 


Type 

Volume 

[l] 

Syst. conn. ** Dry 

Weight 

Dimensions * 

DN mm [kg] Ø H. 

[mm] [mm] 

Order 

Code 

Flamcovent Clean 50 F 10 50 60.3 15 350 560 1 FC DAC 50F 

Flamcovent Clean 65 F 10 65 76.1 15.7 350 560 1 FC DAC 65F 


Flamcovent Clean 100 F 33 100 114.3 28.5 470 756 1 FC DAC 100F 












Flamco dirt seperators 

Price band D 

The Flamco Clean has been designed to separate solid particles from a heating or chilled installation. 

Flamco Clean 

Type 

Syst. 

conn. 

BSP (F) 

Dry 

Weight 

[kg] 

Volume 

[l] 

Dimensions * 

Ø 

[mm] 

H. 

[mm] 

Order 

Code 

Flamco Clean 22 22 mm 1.4 0.22 118 196 1 FC ILD 22MM 

Flamco Clean 3 / 4 3 

/ 4" F 1.4 0.22 118 196 1 FC ILD 075 

Flamco Clean 1 1" F 1.8 0.35 100 216 1 FC ILD 100 

Flamco Clean 1 1 / 4 1 1 / 4" F 2.4 0.48 114 237 1 FC ILD 125 

Flamco Clean 1 1 / 2 1 1 / 2" F 2.5 0.48 114 237 1 FC ILD 150 

Flamco Clean 2 2" F 2.6 0.75 131 255 1 FC ILD 200 

* Incl. threaded connection. 



127

Flamco Clean V 

For mounting in vertical pipes. 

Type 

Syst. 

conn. 

BSP (F) 

Dry 

Weight 

[kg] 

Volume 

[l] 

Dimensions * 

W. 

[mm] 

H. 

[mm] 

Order 

Code 

Flamco Clean V 22 22 mm 2.15 0.4 158 230 1 FC ILD 22MM V 

Flamco Clean V 3 / 4 3 

/ 4" F 2.15 0.4 158 223 1 FC ILD 75MM V 

Flamco Clean V 1 1" F 3.20 0.5 184 247 1 FC ILD 100MM V 

Flamco Clean V 1 1 / 4 1 1 / 4" F 3.05 0.5 184 247 1 FC ILD 125MM V 

* Width and height including connections. 

Flamco Clean S 

Type 

Volume 

[l] 

Connection Weight 

[kg] 

Dimensions * 

DN mm Ø H. 

[mm] [mm] 

Order 

Code 

Flamco Clean S 50 8 50 60.3 8.0 260 525 1 FC ILD 50 S 




Flamco Clean S 125 59 125 139.7 33 525 780 1 FC ILD 125 S 









* Incl. welding connection. 

Flamco Clean F 

Type 

Volume 

[l] 

Syst. conn. ** Weight Dimensions * 

[kg] 

DN mm Ø H. 

[mm] [mm] 

Order 

Code 

Flamco Clean F 50 8 50 60.3 13.1 350 517 1 FC ILD 50 F 





Flamco Clean F 150 60 150 168.3 50 635 780 1 FC ILD 150 F 












7 



Exceptional deaeration performance with compact and robust design, taking up minimal space. 

• The PSD is a differential pressure deaeration unit (Pressure Step Degasser). 

• System fluid is sampled from the system, isolated and subjected to a full vacuum. 

• All dissolved air within the sample is liberated, in accordance with Henry’s Law and vented to atmosphere. 

• The deaerated fluid is then reintroduced to the system. 

• This process is automatically repeated and controlled with a digital processor. 

• A turbo mode is available for initial system setup, to allow for rapid deaeration of new installations. 

• The real-time display shows the status of the mechanical components. 

• A common alarm volt free contact is included within the PSD control unit for remote indication of a fault. 

Type 

System 

pressure 

[bar(g)] 

System 

volume 

[m 3 ] 

D. 

[mm] 

Dimensions System connection Dry 

W. 

[mm] 

Midi PSD 150 D 1.0 - 5.0 50 290 410 485 2 x 15 mm (Rp 1 / 2") 22 1 PSD MIDI 

PSD 1.0 - 6.0 300 330 470 800 2 x 15 mm (Rp 1 / 2") 60 1 FLAMCO PSD 

PSD 280DS 1.0 - 8.0 300 330 600 800 2 x 15 mm (Rp 1 / 2") 50 1 FLAMCO PSD 280DS 

H. 

[mm] 

Weight 

[kg] 

Order 

Code 



129

8. 


The T-plus is an ideal product for the expansion, conversion or overhaul 

of an existing system. No longer is it necessary to isolate, drain, 

de-pressurise or freeze a pipe when an extra branch is required. 

The new branch can be fitted in seconds, even in hard-to-reach places. 

Time is money and installers will immediately appreciate the difference 

that T-plus makes. 

There are three models in the Flamco range (steel, copper and copper 

with integral ball valve) which can be used with a wide range of tubes 

and pipes for water, air and other non-flammable media. 



8 



131

Flamco T-Plus 

Flamco T-plus is useful for expanding, converting or 

renovating existing systems and is unrivalled in its 

installation speed and ease of branches in existing 

piping systems. 

Even in places which are difficult to access, you 

can use Flamco T-plus without any problems. 

Flamco T-plus can also be used in systems that 

have to remain operative round the clock. 

Expensive down-time can be avoided, so for 

example working on a heating system in winter is 

not a problem. 

With Flamco T-plus, you can optimise your service and 

your work will be finished significantly quicker. 

Branch 

Pin 

Charge 

Piston 

Cut out section 

of pipe 

Existing pipe 

Flamco T-plus is particularly useful in: 

• Central heating systems. 

• Potable installations. 

• Fire extinguishers. 

• Industrial systems of all kinds, for instance 

compressed air systems. 

Advantages 

• The installation of Flamco T-plus can be carried 

out at any time. 

• The system does not need to be 

de-pressurized, emptied, refilled and vented. 



8 

How it works 

This is how the Flamco T-plus works 

Piston 

There is a cutting piston in the Flamco T-plus housing. 

Ignition 

When the pin is hit, the charge will ignite. 

Cutting the pipe 

The pressure that is created propels the cutting piston 

forwards and partially cuts open the pipe. 

Cut away section of pipe 

The cut-out section of the pipe is retained between 

the piston and the wall of the Flamco T-plus housing 

and can therefore not enter the pipe. 

In addition to the Flamco T-plus for steel 

pipes, there is a T-plus for thin-walled 

steel pipes, stainless steel pipes and 

copper pipes (see right). 

The cast-iron Flamco T-plus is suitable for steel pipes 

from ½" up to and including 3". The brass Flamco 

T-plus is suitable for thin-walled steel pipes, stainless 

steel pipes and copper pipes with a diameter between 

14 mm and 42 mm. 

The 42 mm version is not suitable for use with stainless 

steel piping. Flamco T-plus is not suitable for use in 

areas containing flammable materials. This includes 

areas where there is a fire or explosion hazard. 



133


Price band D 

A unique product for creating branches in existing installations (e.g. hospitals, industrial installations). 

The fastest and simplest method of making a T-piece coupling. No need to isolate the system. No need to drain down. No 

interruption of system. 

T-plus Cast Iron 

For steel pipes from ½" to 3": 

• Threaded pipes NEN 3257 C Heavy / DIN 2440/2441 / EN 10255 / BS 1387 Heavy (or lighter). 

• Seamless steel pipes DIN 2448/1629 Bl.3, St 35 / EN 10216-1 / ISO 9329-1. 

• Welded steel pipes DIN 2458/1626 Bl.2, St 35 / EN 10217-1 / ISO 9330-1. 

• Max. working pressure: 25 bar(g) (NG: 200 mbar(g)). 

• Max. permissible temperature: 120 °C (NG: 23.5 °C). 

C 

E 

F 

D 

G 

Type Ø Pipe Branch 

connection 

BSP 

Nom. 

["] 

O.D. 

[mm] 

Permissible 

wall 

thickness 

[mm] 

Dimensions 

T-plus 1 / 2 x 1 / 2 x 1 / 2 1 

/ 2" 21.3 1 

/ 2" F 2.0 - 3.25 93 28 19 68 47 1 FC 90315 

T-plus 3 / 4 x 1 / 2 x 3 / 4 3 

/ 4" 26.9 1 

/ 2" F 2.0 - 3.25 100 35 21 77 50 1 FC 90320 

T-plus 1 x 3 / 4 x 1 1" 33.7 3 

/ 4" F 2.0 - 4.05 100 35 24 82 56 1 FC 90326 

T-plus 1 1 / 4 x 1 x 1 1 / 4 1 1 / 4" 42.4 1" F 2.0 - 4.05 115 39 30 103 70 1 FC 90332 

T-plus 1 1 / 2 x 1 1 / 4 x 1 1 / 2 1 1 / 2" 48.3 1 1 / 4" F 2.3 - 4.05 151 55 35 124 83 1 FC 90340 

T-plus 2 x 1 1 / 4 x 2 2" 60.3 1 1 / 4" F 2.3 - 4.50 151 55 41 136 83 1 FC 90350 

T-plus 2 1 / 2 x 1 1 / 4 x 2 1 / 2 2 1 / 2" 76.1 1 1 / 4" F 2.6 - 4.50 180 66 51 152 83 1 FC 90365 

T-plus 3 x 1 1 / 4 x 3 3" 88.9 1 1 / 4" F 2.9 - 5.00 180 66 57 167 83 1 FC 90380 

C 

[mm] 

D 

[mm] 

E 

[mm] 

F 

[mm] 

G 

[mm] 

Order 

Code 



8 

T-plus Brass Kortingsgroep 6 

For thin-walled steel central heating pipes and copper pipes: 

• Thin-walled steel central heating pipes according to NEN 1982 and DIN 2391. 

• Hard (R290) / semi-hard (R250) copper pipes according to EN 1057. 

• Stainless steel pipes according to NEN 1982 and DIN 2391 made of AISI 316 or 1.4401 (except size 42 x ¾ "x 42). 

• Max working pressure: 16 bar(g). 

• Max. permissible temperature: 90 °C. 

C 

E 

F 

D 

G 

Type 

Ø Pipe 

O.D. 

[mm] 

Branch 

connection 

BSP 

Max. permissible 

wall 

thickness 

[mm] 

Suited for Dimensions Order 

Code 

Copper Stainless 

steel 

C 

[mm] 

D 

[mm] 

E 

[mm] 

F 

[mm] 

G 

(mm) 

T-plus 15 x 1 / 2 x 15 15 1 

/ 2" M 1.25 4 4 62 17 13 47 36 1 FC 90115 

T-plus 22 x 1 / 2 x 22 22 1 

/ 2" M 1.25 4 4 75 24 15 56 40 1 FC 90122 

T-plus 28 x 3 / 4 x 28 28 3 

/ 4" F 1.50 4 4 94 29 18 69 56 1 FC 90127 

T-plus 35 x 3 / 4 x 35 35 3 

/ 4" F 1.50 4 4 97 29 25 82 56 1 FC 90134 

T-plus 42 x 3 / 4 x 42 42 3 

/ 4" F 1.50 4 - 110 35 30 87 62 1 FC 90142 

T-plus Brass with ball valve 

For thin-walled steel central heating pipes and copper pipes: 

• Thin-walled steel central heating pipes according to NEN 1982 and DIN 2391. 

• Hard (R290) / semi-hard (R250) copper pipes according to NEN-EN 1057. 

• Stainless steel pipes according to NEN 1982 and DIN 2391 made of AISI 316 or 1.4401. 

• With ball valve. 

• Max working pressure: 10 bar(g). 

• Max. permissible temperature: 90 °C. 

C 

E 

F 

D 

G 

Type 

Ø Pipe 

O.D. 

[mm] 

Branch 

connection 

BSP 

Max. permissible 

wall 

thickness 

[mm] 

Dimensions 

T-plus K 22 x 1 / 2 x 22 22 1 

/ 2" M. 1.25 72 20 16 75 43 1 FC 90222 

C 

[mm] 

D 

[mm] 

E 

[mm] 

F 

[mm] 

G 

[mm] 

Order 

Code 



135

9. 

Supafl ue vitreous 

enamelled steel 

fl ue system 

The most widely specified and installed vitreous enamelled steel flue 

system. 

It is designed for interior use up to 1.8 metres from the appliance to 

join up to the main flue or chimney. It provides a highly durable flue to 

complement the appliance and decor. 

The design is suitable for all fuels - gas, oil, solid fuel and wood. 


BREFCO Supaflue vitreous enamelled steel flue system 

9 


Supaflue 


Supaflue Tees 

Plain pipe with or without 

door 

• Available in 4”, 5” and 6” 

diameters as standard. 

• Standard colours: black, white 

and matt black. 

90° Bend 

• Fitted with a stainless steel soot 

door. 

110° Bend 

• Fitted with or without a stainless 

steel soot door. 

90° Tee 

• To accept draught stabiliser or to 

connect to horizontal flue outlets 

on appliances. 

135° Tee 

• For use on appliances with 

vertical flue outlets as a 

condensate trap or for vertical 

cleaning access. 

135° Bend 



Stabiliser Tee 

• Incorporates a draught stabiliser 

in the branch. 


Flue Liner Adaptor 

• Enables Supaflue to be joined to 

most stainless steel flue liners. 

150° Bend 



Tee Cap 

• Fits on the base of a tee to give 

access for condensate removal 

and cleaning. 

Special Tees to order 

• Customized tees available on 

request. 

Cut Length Adaptor 

• Joins two cut pieces of Supaflue 

together. 

Spun Adaptor or Increaser 

• Connects Supaflue to cast iron, 

steel and asbestos flue pipe. 

• Can be used as an increaser to 

next nominal size. 

300mm Conical Adaptor 

• Connects Supaflue to flue liners, 

cast iron, steel and asbestos flue 

pipe. 


Supaflue Cone Cap 

• Aluminium. 


Supaflue Ceiling Ring 

• For a neat ceiling finish. 

Boiler Adaptor 

• For use on appliances with a deep 

100 (4 in) socket that requires 125 

(5 in) Supaflue. 

Maintenance Clip 

• Stainless steel. 

• Enables appliance removal 

without disturbing other flue 

joints. 



137

Supaflue 

Price band A 

Manufactured from high grade steel, it has two applications of 'Vitramel' vitreous enamel to exposed surfaces, both inside and 

out. This treatment gives Supaflue an extremely high resistance to the hot, toxic and corrosive gases which are formed when 

fuel is burned in an appliance. 

INSTALLATION 

Jointing is by spigot and socket, the socket being formed integrally with the section. Install with the socket uppermost and seal 

with fire cement. 

Note: For Class 1 installations the required minimum diameter is 125 mm (5"). 

Standard items: 

• Available in 100 mm (4"), 125 mm (5"), and 150 mm (6") diameters as standard. 

• Standard colours - black, white and matt black. 

Non standard items available on request: 

• Available in 175 mm (7") and 200 mm (8") diameters. 

• Non standard colours - brown and brilliant white. 

Plain pipe 

Type Dimensions White 

Order 

Code 

Nom. length 

[mm] 

Nom. Ø 

[mm] 

Black 

Order 

Code 

Plain Pipe 300 (1 ft) 100 (4in) 1 SFPN 140WH SFPN 140BL 












Pipe with Door 


Order 

Code 

Nom. length 

[mm] 

Nom. Ø 

[mm] 

Black 

Order 

Code 

Pipe with Door 300 (1 ft) 100 (4in) 1 SFPD 140WH SFPD 140BL 














9 


90° Bend with Door 

Fitted with a stainless steel soot door. 

Price band A 

A 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

90° Bend with Door 100 (4 in) 203 203 1 SFBD 4090WH SFBD 4090BL 



B 



A 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 




B 


Fitted with stainless steel soot door. 

A 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 



135° Bend wit Door 150 (6 in) 222 336 1 SFBD 60135WH SFBD 60135BL 

B 



A 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 



B 

110° Bend without Door 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

110° Bend without Door 100 (4 in) 197 229 1 SFBN 40110WH SFBN 40110BL 



B 

A 



Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 




Note: Care should be taken when specifying bends to ensure that they comply with Building Regulations. 

B 

A 



139



Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 



B 

A 

Supaflue Tees 

Price band A 

90° Tee 

To accept draught stabiliser or to connect to horizontal flue outlets on appliances. 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

90° Tee 100 (4 in) 178 305 1 SFET 40WH SFET 40BL 



135° Tee 

For use on appliances with vertical flue outlets as a condensate trap or for vertical cleaning 

access. 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

135° Tee 100 (4 in) 181 305 1 SFAT 40WH SFAT 40BL 



Stabiliser Tee 

Incorporates a draught stabiliser in the branch. 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

Stabiliser Tee 100 (4 in) 228 305 1 SFDT 40WH SFDT 40BL 



Tee Cap 

Fits on the base of a tee to give access for condensate removal and cleaning. 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

Tee Cap 100 (4 in) 110 40 1 SFEC 40WH SFEC 40BL 



Special Tees to order 

Type 

Dimensions 

Nom. Ø 

[mm] 

White 

Order 

Code 

Special Tees 100 (4 in) 1 SFST 40WH 



B 

B 

B 

B 

A 

A 

A 

A 



9 


Flue Liner Adaptor 

Enables Supaflue to be joined to most stainless steel flue liners. 

B 

Price band A 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

Flue Liner Adaptor 100 (4 in) 114 105 1 SFAEC 40WH SFAEC 40BL 



A 

Cut Length Adaptor 

Joins two cut pieces of Supaflue together. 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

Cut Length Adaptor 100 (4 in) 76 110 1 SFAC 40WH SFAC 40BL 



Spun Adaptor or Increaser 

Connects Supaflue to asbestos, steel or cast iron flue pipe. May be used as an increaser to next 

nominal size. 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

Spun Adaptor or Increaser 100 (4 in) 76 132 1 SFAS 40WH SFAS 40BL 



300mm Conical Adaptor 

Connects Supaflue to flue liners, cast iron, steel and asbestos flue pipe. 'Expanded' pattern 

available to connect to larger diameter flue pipe. 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

300mm Conical Adaptor 100 (4 in) 305 100 1 SFAO 40WH SFAO 40BL 

300mm Conical Adaptor 100x125 (4x5 in) 1 SFAO 4X5WH SFAO 4X5BL 

300mm Conical Adaptor 113(4.5 in) 305 125 1 SFAO 45WH SFAO 45BL 


300mm Conical Adaptor 125x150 (5x6 in) 1 SFAO 5X6WH SFAO 5X6BL 


Boiler Adaptor 

For use on appliances with a deep 100 (4 in) socket that requires 125 (5 in) Supaflue. 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

Boiler Adaptor 125 (5 in) 165 130 1 SFBA 50WH SFBA 50BL 

A 

A 

A 

A 

B 

B 

B 

B 



141


Price band A 

Aluminium Cone Cap 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Aluminium Cone Cap 100 (4 in) 225 230 1 SFCC 40 




Price band A 

Ceiling Ring 

One piece. Gives a neat finish when flue pipe passes through the ceiling. 


Order 

Code 

Nom. Ø 

[mm] 

A 

[mm] 

B 

[mm] 

Black 

Order 

Code 

Ceiling Ring 100 (4 in) 108 179 1 SFCR 40WH SFCR 40BL 



Maintenance Clip 

Stainless steel with sealing gasket. Joins two spigot ends together for use on gas fired systems 

to enable appliance removal without disturbing other flue joints. 

Type 

Dimensions 

Nom. Ø 

[mm] 

White 

Order 

Code 

Maintenance Clip 100 (4 in) 1 SFMC 40 




catgenforcetextbelowlasttable 


9 



143

10. 

Supaplates 

When piping passes through a wall, ceiling or floor the fitting of Flamco 

Supaplates ensures that the installation is completed professionally and 

is pleasing to the eye. They are both functional and effective as they 

cover any unsightly or over-drilled holes. They are sleek in design and 

are available in various shapes and colours. The comprehensive Flamco 

range of Supaplates provides that final finishing touch! 


Supaplates 

11 




RK Supaplates 

• For a neat finish of pipe holes. 

• Fitted with clamp fingers. 

• Colour: Grey, RAL 9002. 

RDC Supaplates 

• For a neat finish of double pipe 

holes. 


• Finished in ABS. 

• Colour: White. 

RKW Supaplates 



• Colour: White, RAL 9010. 

RV Supaplates 


• Fitted with dovetail joint. 

• Colour: Grey, RAL 9002. 

RVC Supaplates 


• Fitted with dovetail joint. 

• Colour: Chrome. 



145


A neat and efficient method of concealing pipe holes in floors, walls and ceilings. 

• Constructed out of polypropylene. 

• Max. temperature: 120 °C. 

• Has clamping jaws, so that the Supaplate cannot slide. 

RK Supaplates 

Colour: Gray. 

Snap-on fitting bracket (pin-hole fastening). 

Ø d 

H 

Ø D 

Type Ø Pipe Dimensions Order 

Code 

Nom. 

(") 

O.D. 

[mm] 

Ø d 

[mm] 

H 

[mm] 

Ø D 

[mm] 

RK 8 – 8 8 12 40 500 FCRK 08 

RK 1 / 8 1 

/ 8" 10 10 12 40 500 FCRK 10 

RK 12 – 12 12 12 54 500 FCRK 12 

RK 1 / 4 1 

/ 4" 14 14 12 40 500 FCRK 14 

RK 15 – 15 15 12 55 500 FCRK 15 

RK 16 – 16 16 12 55 500 FCRK 16 

RK 3 / 8 3 

/ 8" 18 18 12 55 500 FCRK 18 

RK 20 – 20 20 12 55 500 FCRK 20 

RK 1 / 2 1 

/ 2" 22 22 12 55 500 FCRK 22 

RK 25 – 25 25 12 60 500 FCRK 25 

RK 3 / 4 3 

/ 4" 28 28 12 60 500 FCRK 28 

RK 1 1" 35 35 12 68 500 FCRK 35 

RK 1 1 / 4 1 1 / 4" 42.9 42.9 12 75 500 FCRK 42 

RK 1 1 / 2 1 1 / 2" 48.8 48.8 12 88 500 FCRK 150 

RK 57 – 57.6 57.6 12.5 109 500 FCRK 57 

RK 2 2" 60.8 60.8 12.5 109 500 FCRK 200 

RKW Supaplates 

Color: White. 

Snap-on fitting bracket (pin-hole fastening). 

Ø d 

H 

Ø D 


Code 

Nom. 

(") 

O.D. 

[mm] 

Ø d 

[mm] 

H 

[mm] 

Ø D 

[mm] 

RKW 8 – 8 8.8 12 40 500 FCRKW 08 

RKW 1 / 8 1 

/ 8" 10 10.8 12 40 500 FCRKW 10 

RKW 12 – 12 12.8 12 40 500 FCRKW 12 

RKW 1 / 4 1 

/ 4" 14 14.8 12 55 500 FCRKW 14 

RKW 15 – 15 15.8 12 55 500 FCRKW 15 

RKW 16 – 16 16.8 12 55 500 FCRKW 16 

RKW 3 / 8 3 

/ 8" 18 18.8 12 55 500 FCRKW 18 

RKW 20 – 20 20.8 12 55 500 FCRKW 20 

RKW 1 / 2 - 22 1 

/ 2" 22 22.8 12 60 500 FCRKW 22 

RKW 25 – 25 25 12 60 500 FCRKW 25 

RKW 3 / 4 3 

/ 4" 28 28.8 12 68 500 FCRKW 28 

RKW 1 1" 35 35.8 12 75 500 FCRKW 35 

RKW 1 1 / 4 1 1 / 4" 42.9 42.9 12 88 500 FCRKW 42 

RKW 1 1 / 2 1 1 / 2" 48.8 48.8 12 95 500 FCRKW 150 

RKW 57 – 57.6 57.6 12.5 105 500 FCRKW 57 

RKW 2 2" 60.8 60.8 12.5 105 500 FCRKW 200 


Supaplates 

11 

RV Supaplates 

Colour: White. 

Dovetail fastening. 

Ø d 

H 

Ø D 


Code 

Nom. 

(") 

O.D. 

[mm] 

Ø d 

[mm] 

H 

[mm] 

Ø D 

[mm] 

RV 1 / 8 1 

/ 8" 10 10 11.6 40 500 FCRV 10 

RV 12 – 12 12 11.6 42 500 FCRV 12 

RV 15 – 15 15 11.6 45 500 FCRV 15 

RV 3 / 8 3 

/ 8" 18 18 11.6 48 500 FCRV 18 

RV 1 / 2 1 

/ 2" 22 22 11.3 52 500 FCRV 22 

RV 3 / 4 3 

/ 4" 28 28 11.3 52 500 FCRV 28 

RVC Supaplates 

Chromium-plated. 

Dovetail fastening. 

Ø d 

H 

Ø D 


Code 

Nom. 

(") 

O.D. 

[mm] 

Ø d 

[mm] 

H 

[mm] 

Ø D 

[mm] 

RVC 1 / 8 1 

/ 8" 10 10 11.6 40 500 FCRVC 10 

RVC 12 – 12 12 11.6 42 500 FCRVC 12 

RVC 15 – 15 15 11.6 45 500 FCRVC 15 

RVC 3 / 8 3 

/ 8" 18 18 11.6 48 500 FCRVC 18 

RVC 1 / 2 1 

/ 2" 22 22 11.3 52 500 FCRVC 22 

RVC 3 / 4 3 

/ 4" 28 28 11.3 52 500 FCRVC 28 


RDC Supaplates 

Color: Grey. 

E 

H 

B 

RDC 50 


Code 

Nom. 

[mm] 

O.D. 

[mm] 

RDC 50 - 15 99 18 50 50 FCRDC 50 

B 

[mm] 

H 

[mm] 

E 

[mm] 



147

11. 

Renewables and 

sustainable 

From standard domestic installations to complex commercial heating 

systems, Flamco offers the right solution for each application. 

For solar installations, Flamco offers top-quality products, e.g. Flexcon 

Solar diaphragm expansion vessels or Supastor SS Solar unvented 

cylinders. The Solar air vent range removes air to the highest efficiency 

and Prescor safety valves will ensure that the excess water and steam 

are safety discharged. Flamco also offers Solar packages as ready-toinstall 

systems. 

Enair-G-Flow domestic solutions utilising an air source heat pump and a 

stainless steel unvented hot water cylinder (calorifier) as a dual purpose 

thermal store, for hot water and to feed the radiator and/or underfloor 

circuits. 



11 


Vessels and Cylinders 

Safety valves 

De-aeration 

Flexcon Solar 

• 8 - 80 litres. 



• For solar systems. 

Supastor SS Solar unvented 

cylinders 

• For solar installations. 

• 210 - 1,000 litres. 


coil): 6 / 16 bar(g). 

• Two Integrated heating coils. 

Prescor Solar 

• For closed solar installations. 


up to 100%. 

• Working temperature range: -30 °C 

up to 160 °C (120 °C continuously). 

• According to TÜV. SV.08-118.SOL. 


• Air separator using the principle of 

coalescence. 

• Threaded connections from 22 mm 

- 1 1 /2". 

• Can be installed in vertical pipes 

(Flamcovent Solar V) too. 

• Manually-operated air separator for 

solar installations with or without the 

addition of glycol. 

• Including insulation. 


• Automatic floatvent with ball valve. 

• Working temperature range: -30 °C 

up to 180 °C. 

Complete Solar packages 

Solar package 

• Including flat plate collector, expansion 

vessel, on-roof anchors and 

attachment set, solar station with 

intergrated controller, Safety valve, 

solar air separator, solar fluid and a 

Solar cylinder between 210 to 5,000 

litres. 

Dual purpose thermal storage 

Enair-G-Flow 

• Utilising an Air Source Heat Pump 

(ASHP) and a Stainless Steel unvented 

hot water cylinder (Calorifier) 

• Suitable for new and refurbishment 


• Up to 30% saving verses traditional 

gas boilers and 40% verses oil. 



149

Products for Solar Installations 

For solar installations Flamco has a range of top-quality and 

innovative products. From domestic to commercial solar 

installations, Flamco offers the right solution for each application. 

Flexcon Solar 

This diaphragm expansion vessels are suitable for closed, intrinsically 

safe solar power heating installations and have a maximum working 

temperature of 110 °C (continuous) at the level of the diaphragm. 

The top in its class! 

PRESCOR SOLAR 

FLEXCON SOLAR 8 - 25 

FLEXCON SOLAR 35 - 80 

For Calculations of Flexcon Solar expansion vessels 

for Solar Installations we refer to the spreadsheet on 

www.flamco.co.uk - page; Flamco calculation. 

Supastor SS Solar hot water calorifiers 

Unvented cylinders for solar powered potable water 




11 

Prescor Solar 

Prescor safety valves for closed central solar power 

heating and chilled water cooling installations are 

suitable for water/glycol-mixtures up to 100 % and a 

peak temperature of 160 °C. 


Float shut-off valve for closed, intrinsically safe solar 

energy installations. 

Operating temperature: -30 °C to 180 °C. 

The Prescor Solar characteristics: 

• Solid brass body. 

• The valve is made of high-quality rubber, eliminating 

the possibility of sticking. 

• Diaphragm protects the inside from dirt and 

calcification. 

• With special spring from high quality material, so no 

change in spring tension occurs when aging. 

• Button for releasing the valve is made of 

unbreakable plastic. 

FLEXVENT TOP SOLAR 

Flamco Solar Air Vent Range 

For a safe efficient method of air removal 

from solar systems use the Flamco Solar 

Air Vent Range. The Flamco Solar Air 

Vents are used in renewable energy 

applications. 

The air vents are designed for manually operated vents, to allow 

greater control of the fluid pressure within the system. With 

traditional automatic air vents, the release of liberated air can 

result in a drop in system pressure. With solar systems there is a 

real risk of the solar fluid turning to vapour in the event of a 

pressure drop. To prevent this the Solar Air Vents have a manual 

bleed valve for the removal of the accumulated air. 


Flamcovent Solar en Flamcovent Solar V 

air separators remove even the smallest microbubbles 

from the water. 

Flamcovent Solar benefits: 

• Solid brass body. 

• The PALL-rings, made of stainless steel, have a very 

large surface area for an efficient de-aeration process. 

• The venting valve can be closed off with an 

adjusting screw. 

• Suitable for high temperatures. 



151

Enair-G-Flow domestic solutions 

Innovative renewable solutions, utilising an Air 

Source Heat Pump (ASHP) and a Stainless Steel 

unvented hot water cylinder (Calorifier). 

The Enair-G-Flow system uses a hot water cylinder 

(Calorifiers) as a dual purpose thermal store. 

The ASHP heats the domestic hot water, a secondary 

coil in the water tank acts as a heat exchange to feed 

the radiator and/or underfloor circuits. 

The Enair-G-Flow system also relies on a dual 

temperature principle for the central heating. 

A ‘Setback’ control option allows the Occupier/ 

Property Management to maintain the fabric of the 

building at a ‘comfort’ temperature level. 

By maintaining a minimum temperature, it is also 

possible to reduce the main demand on the system 

and in turn costs. The ASHP system makes innovative 

use of a renewable energy source. Typically ASHP 

technology provides a good return on energy used, 

however it is limited in response time and peak 

demand. The Enair-G-Flow system removes the peak 

demand and uses the ASHP at its most efficient. 

When the central heating demand starts to drain the 

heat energy from the cylinder, the two coils are 

hydraulically linked creating a thermal boost for the 

heating, whilst still recharging the cylinder as priority. 

In this way, the ASHP is always provided with 

preheated water, rather than cold, allowing it to work 

within its optimum performance range. 



11 

Benefits: 

• Variable air heat source inputs (5,12 and 18 kW) and 

thermal storage options (210, 250, 300 and 500 

litres). 

• Suitable for new and refurbishment installations. 

• Pre-piped thermal store, valves and controls for 

ease of install. 

• RF control system, with 7 day single and dual 

temperature control. 

• Set back temperature controls (fixed minimum heat 

control). 

• Reduced running costs from constant comfortable 

heating control. In the region of 30%* saving verses 

traditional gas boiler and 40%* verses oil. 

• Competitive payback option to alternative low 

carbon technologies. 

• 3 kW immersion standard backup (6 & 9 kW optional 

extra). 

• Thermal store comes with 25 year guarantee, 

transferable between installation owner. 

Example of Installations and Sizings * 

ASHP 

Cylinder 

Number of Bedrooms 

Number of Baths/Showers 

(l) 

5 kW 210 1/2 Bed Flat 1 Bath/Shower 

12 kW 210 2/3 Bed 1 Bath/Shower 

250 2/3 Bed 2 Bath/Shower 

300 3/4 Bed 2 Bath/ 2 Showers 

18 kW 250 3/4 Bed 2 Bath/ 2 Showers 

300 4/5 Bed 3 Bath/ 3 Showers 

* Please note this is only a Guide line and is subject to insulation, Home Energy rating and system content. 



153

Solar package 

Flamco UK offers ready-to-install systems. From 

standard domestic installations to complex 

commercial heating systems, Flamco will design 

the right solution for each application. 

Typical kit includes: 

• Flat plate collector. 


• On-roof anchors and attachment set. 

• Solar station with intergrated controller. 

• Solar safety valve. 

• Solar air separator. 

• Solar fluid. 

• Solar cylinders 210 to 5,000 litres. 



11 

Technical Specifications for flat panel collectors 

Feature 

Details 

Length 

1820 mm 

Width 

1200 mm 

Height 

109 mm 

Gross surface area 2.18 m 2 

Aperture surface area 1.96 m 2 

Weight 

35 kg 

Collector case 

Highly engineered polycarbonate case construction, tight all around due to deep-drawn 

manufacturing process of one piece, permanently corrosion resistant. 

Glass Cover Low-iron solar safety glass transmission = 91% 

Absorber 

Vacuum, high selectively coated full area absorber 

Absorption = 95 % 

Emission = 5 % 

Fluid capacity 1.261 

Heat transfer medium 

Solar fluid 

Operation pressure (max) 

15 bar(g) 

Solar sensor sleeve 

Inside Ø = 6 mm 

Collector connection 

½" MT flat sealing 

Collector yield, per annum 

Over 525 kWh/m 2 a 

Area of application 

Domestic water heating and heating support 

* For sizing/quotations please contact Flamco UK. 

PRESCOR SOLAR 

FLAMCOVENT SOLAR 

FLEXCON SOLAR 



155



Type 

Volume 

[l] 

Dimensions Weight Order 

Code 

H. 

[mm] 

Ø 

[mm] 

Dry 

[kg] 

Normal full 

[kg] 




SS Solar 500 500 1823 734 75.5 576 1 FC SOLSS 500+KIT 



Technical specifications SS Solar 


• T&P pressure setting: 7 bar. 


• Max. primary pressure (coil): 16 bar. 

Insulation is interlocked polystyrene to allow for inspection of cylinder if required, with the exception of 800 and 1,000 litres 

cylinders that utilise foam jackets. 


SS Solar 

210 250 300 500 800 1000 

Electrical heater quantity 1 1 1 1 2 2 

Electrical heater rating [kW] 3 3 3 3 6 6 

Primary re-heat times * [mins.] 17 21 23 20 23 30 

Primary heat up times ** [mins.] 22 26 30 25 30 37 

Primary flow rate boiler [l/m] 42 42 59 67 92 92 

Primary resistance [mbar] 222 222 398 480 994 994 

Primary continuous output [l/hr] 710 717 769 1451 2050 1983 

Primary coil rating [kW] 37.8 38.2 40.9 77.2 109.1 105.6 

Expansion vessel [l] 12 12 12 24 35 35 


**From cold. 

Selection guide for Supastor SS Solar 

Property Type 

Cylinder Size 

(bedsit) 








11 


Pressure expansion vessels for solar-powered units. 

Flexcon diaphragm solar expansion vessels are made of top-quality steel and come with a high gloss epoxy coating. 

Incorporating clench ring technology, this design offers a high quality and reliable product. The rolling action of the diaphragm 

provides the vessel with a longer life. 






Type 


[l] [bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

8.0 bar(g) 

Order 

Code 

Flexcon Solar 8 8 2.5 245 280 3 

/ 4" 3.2 50 FC SOLAR 8 

Flexcon Solar 12 12 2.5 286 313 3 

/ 4" 4.3 36 FC SOLAR 12 

Flexcon Solar 18 18 2.5 328 306 3 

/ 4" 5.7 24 FC SOLAR 18 

Flexcon Solar 25 25 2.5 358 359 3 

/ 4" 7.3 18 FC SOLAR 25 

Nr. 0343 


Type 


[l] [bar(g)] 

Dimensions 

Ø 

[mm] 

H. 

[mm] 

Syst. 

conn. 

BSP 

(M) 

Dry 

weight 

[kg] 

8.0 bar(g) 

Order 

Code 

Flexcon Solar 35 35 2.5 396 416 3 

/ 4" 8.8 18 FC SOLAR 35 

Flexcon Solar 50 50 2.5 437 473 3 

/ 4" 11.2 12 FC SOLAR 50 

Flexcon Solar 80 80 2.5 519 540 1" 15.0 12 FC SOLAR 80 

Nr. 0343 



157


Price band C 

Flamcovent air separators are used for the total removal of air from central heating and air conditioning systems. The 

Flamcovent principle is based on the proven and effective PALL process (Patented). 

Advantages: 

• Large contact surface. 

• Big chance of collision. 

• Low flow resistance. 

• Max velocity: 1.5 meters per second. 

• Maximum pressure: 10 bar(g). 


• Manual purge. 

• Including purge key. 


For mounting in solar powered installations. 




Weight 

[kg] 

Volume 

[l] 

Dimensions * 

L. x W. x H. 

[mm] 

Order 

Code 

Flamcovent Solar 22 22 mm 1.4 0.22 102 x 113 x 188 1 FCSL 22 

Flamcovent Solar 3 / 4 3 

/ 4" F 1.4 0.22 102 x 113 x 188 1 FCSL 75 






Flamcovent Solar V 

For mounting in vertical pipes in solar powered installations. 




Weight 

[kg] 

Volume 

[l] 

Dimensions * 

L. x W. x H. 

[mm] 

Order 

Code 

Flamcovent Solar V 22 22 mm 1.9 0.4 100 x 190 x 215 1 FCSL V22 

Flamcovent Solar V 3 / 4 3 

/ 4" F 2 0.4 100 x 190 x 215 1 FCSL V75 

Flamcovent Solar V 1 1" F 3.15 0.5 115 x 215 x 227 1 FCSL V100 

Flamcovent Solar V 1 1 / 4 1 1 / 4" F 2.95 0.5 115 x 215 x 227 1 FCSL V125 


Flexvent Solar air vents 

Price band C and D 

The compact proven design has high efficiency and guaranteed operation for heating and air conditioning. The water within the 

installation contains air which can form corrosion and reduce the heat and cold transfer. A Flexvent is fitted at places where the 

air collects. Float operated, the air is collected in the Flexvent causing the float to drop and open the air release valve. When the 

air is eliminated the float rises and closes the valve. 


With ball valve. 


BSP 

Ø H. 

[mm] [mm] 

Shut-off 

valve 

Order 

Code 

Flexvent Top Solar 3 / 8 30 75.5 G 3 / 8" no 1 FC VENT TOP SOL 



11 

Prescor Solar safety valves 

Price band C 

For closed central solar heating installations. 

Should the pressure in the installation rise too high, the Prescor safety valve will ensure that the excess pressure is safely 

discharged. Flamco safety valves have a special shape, which not only achieves a perfect seal, but also a large discharge 

capacity. The valve seal is made of high-quality rubber, which is heat resistant to 140 °C, and the hardness of the rubber is 

adjusted to the set pressure of the safety valve. In this way, the valve cannot stick to the seat. 

• Pre-set (non adjustable). 

• Membrane seal up to 140 °C. 

• Quick release. 

Prescor Solar 

Type 

Set 

pressure 

[bar(g)] 

Inlet 

Connection 

Outlet 

Capacity 

[kW] 

Order 

Code 


/ 2" F 3 

/ 4" F 50 40 FCSV SOL 075/3 


/ 2" F 3 

/ 4" F 50 40 FCSV SOL 050/6 


/ 4" F 1" F 100 40 FCSV SOL 075/6 


/ 4" F 1" F 100 40 FCSV SOL 075/8 




Nr. 0343 



The FlexBalance EcoPlus C allows hydraulic separation between the primary and secondary circuits of commercial heating and 

chilled systems with air and dirt separation. 

• Medium: Water and Water/glycol solutions up to 50%. 

• Min./max. operation temperature: normal conditions -10 °C / 110 °C. 

• Min./max. operation pressure: 0.2 bar(g) / 10 bar(g). 

• Intergration of air- and dirt separation. 

• Steel (S235JRG2) vessel with red epoxy powder coating, RAL 3002. 

• Compression coupling (4x) with con. seal, galvanised steel. NR 340 (pre-assembled). 

• Equipped with an Flexvent Top 3 /8" white (28510) - separate in boxpackaging. 

• Equipped with an drain valve 1 /2" (KP190110) with hose connection. 

• Insulation: 

Material: PUR foam. 

Color: Grey. 

With two quick fasteners. 

D 

E 

C 

F 

A 

B 

G 

Ø 14,5 

Type 

Syst. 

conn. 

Volume 

[l] 

Max. 

capacity 

[kW] 

A 

[mm] 

B 

[mm] 

Dimensions 

Flexbalance EcoPlus C 1 Rp 1" 1,4 60 290 276 85 260 157 618 450 1 28377 

Flexbalance EcoPlus C 1 ¼ Rp 1 ¼" 2,3 100 340 321 85 290 157 678 510 1 28378 

Flexbalance EcoPlus C 1 ½ Rp 1 ½" 3,8 140 340 320 85 320 157 678 510 1 28379 

Flexbalance EcoPlus C 2 Rp 2" 4,5 200 400 373 95 350 167 752 585 1 28380 

C 

[mm] 

D 

[mm] 

E 

[mm] 

F 

[mm] 

G 

[mm] 

Order 

Code 



159

Eco Technology Centre 

Conference and training facility 

The Flamco Conference and training facility 

provides a comprehensive range of services 

including versatile meeting and conference rooms, 

exhibition space, on-site catering, services and 

technical support. 

Location 

Close proximity to the M6 motorway network, 

40 minutes from Manchester airport and City centre 

and 30 minutes Liverpool airport and City centre. 

The facility also benefits from a selection of business 

hotels within a few miles. 

Conference 

Cinema 

Training Room 

Hospitality 



11 

Our facility include: 

• Conference 

With the main training room and two smaller 

meeting rooms the facility can accommodate for 

2 to 60 people. 

• Cinema 

Purpose built state of the art cinema seating 42 people. 

• Catering 

Onsite preparation, dinning facilities and dedicated 

staff provide a high standard of service to meet all 

your catering needs. 

• Off site activities 

Flamco has membership with a local golf course and 

can arrange individual rounds or corporate golf days. 

• Training Room 

4,000 m 2 for exhibitions to show case products and 

entertainment. 

Function Dining Areas 

Conference Dining Areas 

Bespoke Menus 

Hotel and Off Site Activities 



161

Prefabricated Pipe Support Systems 

Total support solutions 

Flamco has manufactured pipe support systems for 50 

years but also delivers prefixed mounted systems. 

These complete systems can be mounted directly, 

saving you valuable time. 

The complete range has been exclusive to BSS under 

the BOSS Flamco brand for 33 years. 

Benefits: 

• Integrated load calculations. 

• Health and Safety (no hot spots from cutting 

equipment on site). 

• Savings in site storage of components. 

• Labour cost savings in assembly work. 

• Integrated system support / 3D compatibility. 

• Environmental savings, reduced power usage and 

reduced material wastage. 

Assessment and Pre-Design - Clips, Rods and Rails 


Technical information 

3 

Final Design Work - Fixings and 3-D Designs 

Fabrication and Delivery - Prefabrication and Logistics 



163

Technical Services and Training 

One stop support 

For all your technical and training requirements 

The Flamco UK Technical Team are on call to answer 

all your technical needs. The team use their product 

knowledge and technical abilities to develop solutions 

and produce detailed information. 

At Flamco we are able to develop courses to train 

individuals and companies in core engineering skills. 

* NB Please contact Flamco for full course details, 

dates and prices. Course packages can be designed 

to meet specific learning needs. 

To discuss details on courses please contact: 

T +44 (0)1744 744 744 

F +44 (0)1744 744 700 


• Telephone support. 

• Technical services. 

• CAD drawings. 

• CPD Presentations. 

• Design packages for new 

applications and new markets. 

• Research and Development. 



3 

Courses for 2012 

Course Type 

Traditional Drafting 

3D CAD Skills 

3D Finite Element Analysis 

Service Engineers (Flamco Sealed Systems) 

Technical Sales Awareness (Flamco Sealed Systems) 

Air Removal From Water Systems 

Sealed System Expansion Vessels 

Pressurisation Equipment 

Accreditation 

Flamco Certificate 





CIBSE Approved Continuing Professional Development 



Laboratory and Training Wet Room 

CAD Training Suite 



165

Dimensions and weights 

Flanges 

According to EN 1092-1 PN 16. 

Material: C 22.3 according to DIN 17243. without corrosion protection. 

d1 

S 

d2 

d3 

r 

h1 

b 

d4 

k 

D 

DN d1 D d3 s b r k h1 Holes D2 d4 Weight 

(kg) 

50 60.3 165 75 2.9 18 6 125 45 4 18 102 2.53 

65 76.1 185 90 2.9 18 6 145 45 8 18 122 3.06 

80 88.9 200 105 3.2 20 8 160 50 8 18 138 3.7 

100 114.3 220 125 3.6 20 8 180 52 8 18 158 4.62 

125 139.7 250 156 4 22 8 210 55 8 18 188 6.3 

150 168.3 285 184 4.5 22 10 240 55 8 22 212 7.75 

200 219.1 340 235 5.9 24 10 295 62 12 22 268 11.0 

250 273 405 292 6.3 26 12 355 70 12 26 320 15.6 

300 323.9 460 344 7.1 28 12 410 78 12 26 378 22.0 

350 355.6 520 390 8 30 12 470 82 16 26 438 28.7 

400 406.4 580 445 8 32 12 525 85 16 30 490 36.3 

450 457 640 490 8 32 12 585 85 18 30 550 44.1 

500 508 715 548 8 34 12 650 90 20 33 610 61.0 

600 610 840 652 8.8 36 12 770 95 20 36 725 75.4 

Conversions and calculations 

(Metric and Imperial) 

Conversion formulae 

Metric 

1 litre = 1000 cm 3 

(61 in 3 ) 

0.22 gal. 

1.76 pt. 

1 cu. meter = 1000 litre. 

( 1 m 2 ) 35.31 ft 3 . 

1.31 yd 3 . 

1 meter = 39.37 in. 

3.28 ft. 

1.09 yd. 

1 sq. meter = 1550.39 in 2 

( 1 m 2 ) 10.763 ft 2 

1.195 yds 2 

1 kilogram = 2.204 lb. 

Imperial 

1 gallon = 277 in 3 

(4546 cm 3 ) 

10 lb. (4.533 kg.) 

4.54 litre. 

1 cubic foot = 6.23 gal. 

0,028 m 3 . 

1 inch = 25.4 mm. 

1 foot = 304.8 mm. 

1 yard = 914.4 mm. 

1 sq. yard = 0.836 m 2 . 

1 pound = 0.4536 kg. 

Volume flow rate 

l / s l / min m 3 / hr l.g.p.m. l.g.p.h. U.S.g.p.m. 

1 60 3.6 13.2 792 15.84 

0.01667 1 0.06 0.22 13.2 0.264 

0.2778 16.67 1 3.667 220 4.4 

0.07577 4.546 0.2727 1 60 1.2 

0.001263 0.07577 0.004546 0.01667 1 0.02 

0.06314 3.788 0.2273 0.8333 50 1 



3 

Volume 

Heat flow rate 

Pressure 

Velocity 

Litres m 3 Imp galls U.S. galls ft 3 

1 0.001 0.22 0.264 0.03532 

1000 1 220 264.17 35.32 

4.546 0.004546 1 1.2 0.16054 

3.788 0.003788 0.8333 1 0.1339 

28.32 0.02832 6.229 7.475 1 

kW joules / sec Btu / hr k.cal / hr 

1 1000 3412 859.8 

0.001 1 3.412 0.8598 

0.0002931 0.2931 1 0.252 

0.001163 1.163 3.968 1 

bar psi kPa 

1 14.5 100 

0.06895 1 6,89476 

0.01 0.145 1 

Ft / sec 

m / sec 

1 0.3048 

3.28084 1 



167

Index 

Symbols 

90° Bend with Door ..................................................................... 139 

90° Tee ........................................................................................ 140 

110° Bend with Door ................................................................... 139 


135° Bend with Door ................................................................... 139 


135° Tee ...................................................................................... 140 

150° Bend with Door ................................................................... 139 


300mm Conical Adaptor ............................................................... 141 

A 

Airfix A ............................................................................................ 77 

Airfix D ............................................................................................ 77 

Airfix D-E ........................................................................................ 86 

Airfix D-E-B .................................................................................... 86 

Airfix D-E-L ..................................................................................... 87 

Airfix D-E-P 500 - 3000 .................................................................. 81 

Airfix P 2 - 35 .................................................................................. 80 

Airfix P 50 - 300 .............................................................................. 81 

Airfix P 500 - 2000 .......................................................................... 81 

Airfix P Horizontal ........................................................................... 81 

Aluminium Cone Cap .................................................................... 142 

B 

Basepak Expansion Equipment ...................................................... 39 

Boiler Adaptor .............................................................................. 141 

C 

Ceiling Ring .................................................................................. 142 

Check Valves .................................................................................. 60 

Combi RepairKit ............................................................................. 25 

Component Sets ............................................................................ 61 

Connection set ½ ........................................................................... 58 

Cubex 8 - 35 - 3.0 bar(g) ................................................................ 23 

Cubex 50 - 80 - 6.0 bar(g) .............................................................. 23 

Cubexpak Type A ........................................................................... 25 

Cubexpak Type B ........................................................................... 25 

Cut Length Adaptor ...................................................................... 141 

D 

D twin pump sets ........................................................................... 48 

F 

Flamco Clean ............................................................................... 127 

Flamco Clean F ............................................................................ 128 

Flamco Clean S ............................................................................ 128 

Flamco Clean V ............................................................................ 128 

Flamcomat BB auxiliary vessels ...................................................... 49 

Flamcomat GB main vessels .......................................................... 49 

Flamcovent ................................................................................... 120 

Flamcovent Adaptor ..................................................................... 121 

Flamcovent Clean ......................................................................... 126 

Flamcovent Clean F ...................................................................... 127 

Flamcovent Clean S ...................................................................... 127 

Flamcovent F ................................................................................ 121 

Flamcovent S ............................................................................... 121 

Flamcovent Solar .................................................................. 120, 158 

Flamcovent Solar V ............................................................... 120, 158 

Flamcovent V ................................................................................ 120 

Flexair F ........................................................................................ 126 

Flexair G ....................................................................................... 125 

Flexair S ............................................................................... 125, 126 

FlexBalance EcoPlus C ........................................................... 68, 159 

FlexBalance F ................................................................................. 66 

FlexBalance Plus F ......................................................................... 67 

Flexcon 110 - 1000 - 6.0 bar(g) ...................................................... 27 

Flexcon 110 - 1000 - 10.0 bar(g) .................................................... 27 

Flexcon DT ..................................................................................... 91 

Flexcon M 80 - 8000 - 6.0 bar(g) .................................................... 29 

Flexcon M 80 - 8000 - 10.0 bar(g) .................................................. 29 

Flexconpak Expansion Equipment .................................................. 39 

Flexcon Solar 8 - 25 ............................................................... 26, 157 

Flexcon Solar 35 - 80 ............................................................. 26, 157 

Flexconsole ¾ ................................................................................ 59 

Flexconsole Plus ............................................................................. 59 

Flexcon Top 2 - 25 .......................................................................... 22 

Flexcon Top 35 - 80 ........................................................................ 22 

Flexcon VSV - 6.0 bar(g) ................................................................. 31 

Flexcon VSV - 10.0 bar(g) ............................................................... 31 

Flexfast ¾ ....................................................................................... 58 

Flexfiller Digital Glycol Pressurisation ............................................... 37 

Flexfiller Midi ................................................................................... 38 

Flexfiller Mini ................................................................................... 38 

Flexfiller Standard ........................................................................... 38 

Flexfiller Twin System ...................................................................... 38 

Flexfill Plus ...................................................................................... 36 

Flexofit S ........................................................................................ 90 

Flexvent ........................................................................................ 124 

Flexvent Adaptor .......................................................................... 125 

Flexvent H .................................................................................... 124 

Flexvent Super .............................................................................. 124 

Flexvent Top ................................................................................. 124 

Flexvent Top Solar ................................................................ 125, 158 

Flopressmano ................................................................................. 55 

Flue Liner Adaptor ........................................................................ 141 

I 

Intake Preventor Vent P ................................................................ 125 

M 

Maintenance Clip .......................................................................... 142 

MB ........................................................................................... 59, 91 

MidiFill Plus ..................................................................................... 37 

Mild steel dosing pots ..................................................................... 63 

P 

Pipe with Door .............................................................................. 138 

Plain pipe ..................................................................................... 138 

Prescomano ................................................................................... 55 

Prescor ........................................................................................... 54 

Prescor B ....................................................................................... 90 

Prescor S ....................................................................................... 54 

Prescor Solar .......................................................................... 55, 159 

Presspak Digital Packaged Sealed System Sets ............................. 39 

Pressure gauge .............................................................................. 58 

Pressure Reducing Valves ............................................................... 60 

Pressure Step Degasser ............................................................... 129 

Pressure/Thermo gauge ................................................................. 58 

PS 50 - 850 .................................................................................. 106 

PS 1000 - 3000 ............................................................................ 107 

R 

RDC Supaplates ........................................................................... 147 

RK Supaplates ............................................................................. 146 

RKW Supaplates .......................................................................... 146 

RVC Supaplates ........................................................................... 147 

RV Supaplates .............................................................................. 147 


Index 

A/B/C... 

S 

SB-A .............................................................................................. 91 

Special Tees to order .................................................................... 140 

Spun Adaptor or Increaser ............................................................ 141 

Stabiliser Tee ................................................................................ 140 

Stainless 120 - 1000 .................................................................... 105 

Stainless steel dosing pots ............................................................. 63 

Stainless steel single coil industrial cylinders ................................. 104 

Stainless steel triple coil industrial cylinders ................................... 104 

Stainless steel twin coil industrial cylinders .................................... 104 

Strainers ......................................................................................... 61 

Supamix FS .................................................................................... 62 

Supamix NHS ................................................................................. 62 

Supastor Direct (including kit) ......................................................... 98 

Supastor Indirect (including kit) ..................................................... 100 

Supastor SS Solar unvented cylinders .................................. 102, 156 

T 

Tee Cap ........................................................................................ 140 

T-fitting Flexofit S ............................................................................ 90 

T-plus Brass ................................................................................. 135 

T-plus Brass with ball valve ........................................................... 135 

T-plus Cast Iron ............................................................................ 134 

Tundish ........................................................................................... 55 

U 

Uni-Fil Filling sets ............................................................................ 61 

V 

Vessel carrier .................................................................................. 90 

Vesselpak Type A ............................................................................ 24 

Vesselpak Type B ........................................................................... 24 



169

Sealed System Equipment Enquiry Form 

• Fax back to Flamco UK Ltd Technical on Fax: +44 (0)1744 744700 

Contact details: 

• Name: 

• Tel. Number: 

• Fax Number: 

• Company: 

• Address: 

• Postcode: 

• Project Ref: 

• System Type (Please indicate system style, check 1 box only) 

LTHW (Low Temperature Heating Water) 

MTHW (Medium Temperature Heating Water) 

Condenser Water 

Chilled Water 

Expansion Vessels & Pressurisation Equipment: 

• Initial System Pressure (Please indicate initial pressure conditions) 

Static Height Above The Equipment 

m 

Cold Fill Pressure Of The System At The Equipment 

bar 

• Safety (Please indicate the safety relief valve setting for the system) 

Maximum Working Pressure 

bar 

• System Temperature (Please indicate the operating temperatures) 

Operating Temperature Range Flow ºC 

Return ºC 

• Fluid Makeup (Please indicate the system fluid makeup) 

100% Water 

20% Glycol, 80% Water 

30% Glycol, 70% Water 

Other, please specify 

• System Water Content 

l/s 

• Boiler/Chiller Power Rating 

kW 

Air and Dirt Removal Equipment: 

• Water Flow Rate (Please indicate the water speed) 

Flow Rate 

• Options (Please indicate removal equipment required) 

Free Air Only 

Microbubble Removal Only 

Microbubble & Dirt Removal (Combined) 

Dirt Removal Only 

Vacuum Pressure Step Degassing 

l/s 

Storage Vessels: 

Pressure 

Volume 

Temperature 

Accessories: 

• Please indicate any accessories you may require 

Safety Valve and Tundish 

Flexvent Super automatic air vent-mounted vertically 


 

 

Conditions of sales 

1. 

The following represent a selection of terms contained within our full Terms and 

Conditions of Sale, a copy of which is available on request. 

2. 

Contracts and orders are accepted and goods delivered by us only upon and 

subject to our full Terms and Conditions of Sale. Unless expressly accepted 

in writing, any qualifications of these conditions in a customers form must be 

deemed to be and will be treated as inapplicable. 

3. 

Orders accepted and acknowledged by us in writing cannot be cancelled or 

varied without written consent. Whilst every effort will be maintained to adhere 

to the stated delivery we shall not be liable or responsible for delays due to 

any circumstances outside our control, unforeseen hindrances, shortage of 

materials, delays in transit, accidents, strikes, lockouts or other industrial 

disputes, acts of god, force majeure, riot or civil commotion.. 

4. 

In the event of non-correspondence with description or sample the buyer may 

reject the goods. If, however, the buyer accepts such goods, we shall not be 

liable for consequential damages arising from such acceptance. 

5. 

All goods are carefully tested and inspected before despatch. Should any 

goods appear defective owing to faulty materials or manufacture, they must 

be returned to us for examination. If we (acting reasonably) agree they are 

defective, we shall replace them. This shall be our only obligation in relation to 

the defective goods, unless we have notified you in writing of any additional 

warranties we may provide and you have complied with all conditions attached 

to these warranties. Beyond this all conditions, warranties and representations 

expressed or implied by statute, common law or otherwise in relation to the 

Goods (save for the conditions implied by section 12 of the Sale of Goods Act 

1979) are excluded from the Contract to the fullest extent permitted by law (if 

you are acting as a consumer please see paragraph below). 

6. 

We are not liable for any indirect, special or consequential liabilities, losses, 

charges, damages, costs and expenses you suffer howsoever caused and 

including, without limitation, pure economic loss, loss of anticipated profits, 

goodwill, revenue, reputation, anticipated savings, management time, business 

receipts or contracts or losses or expenses resulting from third party claims. 

Nothing in these Conditions excludes or limits our liability (a) for death or 

personal injury caused by our negligence, (b) for our fraud or fraudulent 

misrepresentation or (c) for any matter which it would be illegal for us to exclude 

or attempt to exclude our liability. If you are acting as a consumer you will have 

additional statutory rights which we cannot contract out of and we are not 

excluding or limiting these rights. 

12. 

Buyers or their agents within the United Kingdom and Republic of Ireland must 

notify the carrier and us in writing in the event of damage to or partial loss of 

goods within three days of delivery. In the event of non-receipt of goods, both 

the carrier and Flamco UK Ltd must be notified in writing within ten days of 

receipt of invoice. Unless such notification is received, the goods will be deemed 

to have arrived in good condition and we shall not be liable upon and shall have 

the right to reject any claim in respect of any such damage, loss, shortage or 

non-receipt of goods. 

13. 

If the buyer uses or sells the products in such manner as to infringe any patent 

rights, we shall not be responsible for such infringements and the buyer agrees 

to indemnify us from and against all liability arising therefrom. 

14. 

If the buyer shall become bankrupt or commit any act of bankruptcy or if the 

buyer is put into liquidation otherwise than by voluntary liquidation for the 

purpose only of amalgamation or reconstruction or if a receiver of the buyers 

assets or undertaking or any part therefore is appointed, we may at our option 

cancel the contract in relation to future deliveries. 

15. 

The contract between the buyer and Flamco UK Ltd will be governed by English 

law. 

16. 

Goods will be invoiced at prices ruling at date of despatch. 

17. 

From the time of delivery the goods shall be at the risk of the buyer, but the 

goods shall remain the property of the company until all payments due under the 

contract have been made in full and unconditionally. Whilst the ownership of the 

company continues, the buyer shall keep the goods separate and identifiable 

from all other goods in its possession as bailee for the company. In the event of 

any resale by the buyer of the goods beneficial entitlement of the company shall 

attach to the proceeds of sale thereof. In the event of failure to pay the price in 

accordance with the contractual obligations the company shall have the power 

to re-sell the goods after responsible notice. 

Flamco UK Limited. 

January 2012 

7. 

All recommendations or advice given by us or our servants or agents to the buyer 

or his servant or agents as to the mode of storing, applying or using the goods 

supplied are given without liability on our part. 

8. 

Two approved trade references are requested for all new accounts. 

9. 

Goods to above value of £250 net are delivered free of charge on a standard 

three working day delivery within the United Kingdom and the Republic of 

Ireland. Where a more urgent delivery or special off-loading arrangements are 

required, we reserve the right to make additional charges and a quotation for 

such charges will be provided on request. Export orders will have carriage 

charged unless our quotation states that it includes CIF charges. 

10. 

Off-loading of goods is not the responsibility of Flamco UK Ltd and provision for 

all off-loading, including but not limited to carriage, is the responsibility of the 

customer. 

11. 

Packing cases are returnable and will be charged at cost unless returned in 

good condition, carriage paid to our warehouse within two months. 



171

Flamco UK Ltd. 

Washway Lane 

St.Helens, Merseyside 

WA10 6PB 

United Kingdom 

T +44 1744 744744 

F +44 1744 744700 


I www.flamco.co.uk 

Copyright Flamco UK Ltd. 

No part of this publication may be reproduced or published in any way without 

explicit consent of Flamco UK Ltd. and reference of the source. The data listed 

applies solely to Flamco products. Flamco UK Ltd. is in no way liable for the 

misuse of the equipment or incorrect interpretation of the technical information 

contained herein. Flamco UK Ltd. reserves the right to change designs, technical 

specifications and prices of its products. 

E&OE 

MC00187/07-2012/eng

Product Overview - Flamco

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?