Dual manifolds and differential by-pass valve - Caleffi

Dual manifolds and
differential by-pass valve
series 356 - 357
Technical specification
Material: brass EN 12165 CW617N
Main connections: 3/4” and 1” F
Branch connections: 23 p. 1,5 M - Ø 18 mm
Main connections centre distance: 60 mm
Branch centre distance: 40 mm
Average internal diameter: 3/4”: Ø 20 mm
1”: Ø 26 mm
Max working pressure: 10 bar
Temperature range: -10÷110°C
Constructional details
These manifolds are made out of a single monoblock casting,
without the need for additional connections between the internal
tubes. This eliminates a possible cause of problems due to the
joining of metals with different thermal expansion coefficients.
The connections of the side branches are at right angles to the main
headers, to allow for easier connections.
Hydraulic characteristics
Localized loss factor ξ of inlet connections (F+R): 3,0
Localized loss factor ξ of branches (F+R): 6,5
01014/03 GB
Function
Dual manifolds are typically used for the distribution of
heat-carrying fluid in heating and air conditioning systems. They
are available with both double side and single side connections
and can be used to connect copper, plastic or multi-layer piping.
The differential by-pass valve keeps the manifold flow and return
circuits pressure balanced when the flow rate varies. This
variation in flow rate can take place following the closure of room
temperature regulating valves on the heat emitters - for example,
thermostatic or electrothermal valves.
Product range
MANIFOLDS:
Series 356 double side connections Sizes 3/4” and 1”
Series 357 single side connections Size 3/4”
DIFFERENTIAL BY-PASS VALVE:
Code 356050 Size 3/4”
Dimensions
Code
356502
356504
356506
356508
356510
356604
356606
356608
356610
356612
A A
60
B
Code
357502
357503
357504
357505
357506
B
60
A A
A
3/4“
3/4“
3/4“
3/4“
3/4“
1“
1“
1“
1“
1“
A
3/4“
3/4“
3/4“
3/4“
3/4“
CALEFFI
Branches
2+2
4+4
6+6
8+8
10+10
4+4
6+6
8+8
10+10
12+12
40
CALEFFI
Branches
2+2
3+3
4+4
5+5
6+6
cert. n° 0003
ISO 9001
Mod. Dep.
40
B
116
116
116
116
116
122
122
122
122
122
B
105
105
105
105
105
E
C
C
23 p.1,5
23 p.1,5
23 p.1,5
23 p.1,5
23 p.1,5
23 p.1,5
23 p.1,5
23 p.1,5
23 p.1,5
23 p.1,5
Mod. Dep. CALEFFI
357
73
E
CALEFFI
C
23 p.1,5
23 p.1,5
23 p.1,5
23 p.1,5
23 p.1,5
C
356
D
D
30
30
30
30
30
32
32
32
32
32
Mod. Dep.
D
30
30
30
30
30
357
E
100
180
260
340
420
184
264
344
424
538
D
E
180
260
373
453
533

Technical specification of by-pass
Material: brass EN 12165 CW617N
Seals: EPDM
Max working pressure: 10 bar
Temperature range: -10÷110°C
Connections to manifold: 3/4” adjustable nut
Head connections: 3/8” (with plug)
Centre distance: 60 mm
Hydraulic characteristics
By-pass differential pressure: 20 kPa (2000 mm w.g.)
∆P (mm w.g.)
10000
9000
8000
7000
6000
5000
4500
4000
3500
3000
2500
2000
1800
1600
1400
1200
1000
50
60
70
80
90
100
120
140
160
180
200
250
300
350
400
450
500
600
700
800
900
90
80
70
60
30
25
12
Q (l/h)
∆P (kPa)
100
50
45
40
35
20
18
16
14
1000
10
Dimensions
B B
A A
SPECIFICATION SUMMARIES
Code
356050
Series 356
Dual manifold in monoblock casting with double side connections. Brass body. Main connections 3/4” or 1”.
Branch connections 23 p.1,5 M - Ø 18 mm. Main centre distance 60 mm. Branch centre distance 40 mm. Maximum
working pressure 10 bar. Temperature range -10÷110°C.
Series 357
Dual manifold in monoblock casting with single side connections. Brass body. Main connections 3/4” or 1”.
Branch connections 23 p.1,5 M - Ø 18 mm. Main centre distance 60 mm. Branch centre distance 40 mm. Maximum
working pressure 10 bar. Temperature range -10÷110°C.
Code 356050
Differential by-pass valve for dual manifolds. Brass body. Connections to manifold 3/4” with adjustable nut.
Head connections 3/8” with plug. EPDM seals. Temperature range -10÷110°C. Maximum working pressure 10 bar.
Centre distance 60 mm. Fixed differential pressure calibration 20 kPa.
C
Application diagram
3 · · · 4
2 · · ·
4
· 3 · · ·
Thermostatic valve
3 · · · · · · 2
4
2 · ·
D
CALEFFI
Mod. Dep. CALEFFI
We reserve the right to change our products and their relevant technical data, contained in this publication, at any time and without prior notice.
CALEFFI
CALEFFI S.P.A. · I · 28010 FONTANETO D’AGOGNA (NO) · S.R. 229, N.25 · TEL.INT. +39 0322 8491 R.A. · FAX +39 0322 863723
· Http://www.caleffi.com · E-mail: info@caleffi.it ·
357
356
3 · · · 4
2 · · ·
A
3/4”
Mod. Dep.
CALEFFI
Mod. Dep.
357
B
3/8”
C
60
D
55