Bailey Technical Catalogue - Safety Systems UK Ltd

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Class F Hose Pressure RegulatorThe Class F Hose Pressure Regulator combines thefeatures of a fire hydrant valve and a direct actingwater pressure regulator, to give a single unit whichprotects the fire crew from excess pressure in the firehose which could cause difficulties in handling thehose. High pressure fire systems are to be found inhigh rise buildings, oil, gas and chemical facilities.OPERATIONThe Class F hose pressure regulator incorporates aspring loaded “balanced” pressure reducing valvecombined with a hydrant stop valve. The stop valveelement is operated in exactly the same way as aconventional hydrant stop valve (clockwise rotation toclose, anti-clockwise rotation to open).The reducing valve element is opened by the loadapplied to the pressure adjusting spring and closed bythe reduced pressure acting upon the underside of thediaphragm. Under working conditions the balance ofthese two forces determines the degree of valveopening required to maintain a steady outlet pressure.Accurate pressure control is achieved by a venturisection in the outlet flow area, which ensures thatthere is a minimal rise in outlet pressure between thefully open and fully closed positions.Under conditions of varying flow rates, the closecontrol of the Class F ensures a uniform fire fightingpressure is maintained at any hydrant in a fireprotection system.APPLICATIONSThe Class F hose pressure regulator is suitable for:• Fire mains systems in high rise buildings.• High pressure systems on oil rig platforms and in oilrefineries and chemical plants.• Hand held hoses and fixed monitors, whereindividual pressure requirements vary.• Applications with high pressure drops caused by thelength of water mains.• Applications with low pressure condition producedby pump characteristics.• Floating production, storage and off-loading (FPSO)vessels.TECHNICAL SPECIFICATIONSize Valve size is always 1 1 ⁄2"ConnectionsInlet Standard Flanged 1 1 ⁄2"Options Flanged 2, 2 1 ⁄2, 3"Available as ANSI 150/300Outlet Standard 2 1 ⁄2" BS336Instantaneous femalecoupling.Options Screwed 2 1 ⁄2" BSP male.To suit internationallyrecommendedadaptors.MaterialsThe standard valve construction is bronze withaluminium bronze trim, which is used for bothfresh water and sea water.This is also available in Titanium and AB2.Our Technical Department will be pleased to adviseon other required materials.Inlet Pressure Range 4.8 to 20.7 BargOutlet Pressure Range* 4.1 to 8.3 Barg* Setting including rise at dead end of 0.7 Barg (see page 56).FEATURES AND BENEFITS• Designed to meet the needs of modern fireprotection technology.• Maintains a uniform fire fighting pressure at everyhydrant in a fire protection system, irrespective oflocation.• Accurate pressure control is maintained despitevarying flow levels and inlet pressures.• Greatly reduces installation costs by completelyeliminating expensive relief piping systems.• Individual floor level pressure requirements met byquick and easy in-situ regulator adjustment.• Sea-water resistant trim incorporated as standard.• Available in a wide variety of material options, tosuit particular applications.CE MARKINGThe Class F is not required to be PED certified onwater applications, hence cannot be CE marked.53
170mm(194mm with SPO)460mm(483mm with SPO)PARTS3536333432373120304222OPTIONAL ‘ SPO’ DEVICEClass F with set pressure override deviceAn optional feature of the valve is a set pressureoverride device (or SPO) which, when actuated,allows full opening of the valve without regulating thedownstream pressure, thereby bringing it very closeto the available inlet pressure.The SPO can be usedfor manifoldingapplications where thevalve has to supply acombination of unitse.g. water cannons,hand held hoses orfoam makingequipment.4531692819132mm2144022 2426SPRING SELECTIONDEAD ENDPRESSURESETTINGRANGE (Barg)DEAD ENDPRESSURESETTINGRANGE (Psig)89mm38 23 29 41 21Weight approx. 15kgCOLOURCODE4.1 to 5.5 60 to 80 Brown5.5 to 8.3 80 to 120 Blue23 29 382553924151712727681810131114123334323635ITEM PART MATERIAL1 Body Bronze2* Valve Disc Nitrile3 Disc Holder Bronze4 Bonnet Bronze5* Bonnet Joint NAF6* High Pressure Seal Rubber7 H.P. Seal Ring Al. Bronze8 Distance Piece Al. Bronze9* Diaphragm Nitrile10 Piston Bronze11 Spring Plt. Steel12 Adjusting Screw Bronze13 Spring Chamber Bronze14 Adjusting Screw Plate Al. Bronze15 Valve Stem Al. Bronze16 Valve Stem Sleeve Al. Bronze17* Valve Stem Joint NAF18 Set Screws St. St.19* Adjusting Screw Ball PhosphorBronze20 Washer Rubber21 Handwheel Bronze22 Handwheel Stem Bronze23 Handwheel Nut Brass24* Handwheel Stem Ball PhosphorBronze25 Valve Stem Nut Brass26 Handwheel Stem‘O’ RingRubber27 Body ‘O’ Ring Nitrile28 Lock Screw St. St.29 Handwheel Washer Brass30 Adaptor Body Bronze31* Coupling Washer Neoprene32* Coupling Bolt Bronze33 Quick Release Cap Bronze34* Coupling Spring PhosphorBronze35 Screwed Cap Brass36 Philidas Nut Bronze37 Cap and Chain Bronze38 Nameplate Aluminium39 Retaining Nut Bronze40 Position Indicator Aluminium41 Gland Bronze42* Gland ‘O’ Ring Nitrile*Repair pack; available from Safety Systems UK Ltd.Recommended inspection every 12 months54
Page 1:
Pressure & Flame ProtectionSafety &
Page 4 and 5: The logical choiceWherever demandin
Page 6 and 7: Safety Relief ValvesINTRODUCTIONThe
Page 9 and 10: INSTALLATIONSafety Relief Valves sh
Page 17 and 18: SIZINGTemperature Rating in kWSize
Page 19 and 20: PARTSITEM PART MATERIALSCarbon Stee
Page 21 and 22: PARTSITEM PART MATERIALCarbon Steel
Page 23 and 24: PARTSITEM PART MATERIALThere are tw
Page 25 and 26: PARTS1418121611101978613317152ITEM
Page 27 and 28: PARTSITEM PARTMATERIAL480 490119105
Page 29 and 30: PARTSITEM PART MATERIAL211692028173
Page 31 and 32: G4 SeriesPILOT OPERATED PRESSURE RE
Page 33 and 34: LOW PRESSURE TOPGAS AND OXYGEN DUTI
Page 35 and 36: MATERIALSITEM 2042 & 2043 2044 2045
Page 37 and 38: DIMENSIONSCONNECTION OPTIONSBCScrew
Page 39 and 40: INSTALLATIONTYPICAL STEAM REDUCING
Page 41 and 42: SIZINGThe G4 Pressure Regulator can
Page 43 and 44: SURPLUS/MAINTAINING VALVESThe ‘G4
Page 45 and 46: TECHNICAL SPECIFICATION - G4 SURPLU
Page 47 and 48: PARTSITEM PARTMATERIALA191220111098
Page 49 and 50: Vent holeCXAAIN OUTBDDIMENSIONSScre
Page 51 and 52: PARTSITEM PARTMATERIAL1 Adjusting S
Page 53: PARTSITEM PARTMATERIAL121* Piston S
Page 57 and 58: RISE AT DEAD ENDDEAD END SETTINGThi
Page 59 and 60: SIGHT GLASSThe Bailey 1001S Sight G
Page 61 and 62: AIR CAPACITY CHART (l/s) @ 0.3 Barg
Page 63 and 64: SATURATED STEAM CAPACITY CHART (kg/
Page 65 and 66: WATER CAPACITY CHART (l/min) @ 10%
Page 67 and 68: HOT WATER CAPACITY CHART (kW) FOR A
Page 69 and 70: G4 DRY SATURATED STEAM CAPACITY - K
Page 71 and 72: G4 PIPE SIZINGCAPACITIES FOR STEAM
Page 73 and 74: AIR CAPACITIESInletPressure(Barg)Ou
Page 75 and 76: WATER CAPACITIESPressureDifferentia
Page 77 and 78: SATURATED STEAM CAPACITIESInletPres
Page 79 and 80: SpringSelectionCharts78
Page 81 and 82: 716 SPRING SELECTIONDN15 Spring Ran
Page 83: Safety Systems UK Ltd.Sharp Street,
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Bailey Technical Catalogue - Safety Systems UK Ltd

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