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1、GRTRegulatorDomeloadedPressureRegulatorHP25GRT’sHPseriesregulatorisakindofhighpressureregulatorwhichusepilottoregulatetheloadingpressureinthetopcaveinordertocontroltheoutletpressure.Mainfeaturesoftheproductareasfollow:òGreaterflowratesòCounterbalancedtrimdesignò
2、HighregulatingaccuracyòHighstabilityòLowlock-uppressureòStrengthendiaphragmòLownumberofpartsòEasyoutletpressuresettingòEasyinstallation,easymaintenanceApplicationItcanbeusedfornaturegas,propane,butane,nitrogen,carbondioxide,compressedairandotherindustrygas(excep
3、toxygen).HowtheregulatorworksTheoutletpressureoftheregulatorissetbytheadjustingscrewofthepilot.Whenthedownstreamvolumeincreased,outletpressurebegantodecrease,thenthepressureunderthemaindiaphragmdecreased,thepressureonthediagrampushthediaphragmmovedown,makethemai
4、nvalveopeningbetweenplugandvalveseatincreased,thentheflowvolumeincreased,keepdownstreampressure’sstability.Whenthedownstreamvolumedecreased,theactionoftheregulatorisreversedtheprocessabove,untiltheregulatorshutdownentirely.GRTRegulatingTechnologyCo.,LtdGRTRegula
5、torTechnicalfeaturesMaxallowablepressureP1:upto250barSetrangeP2:10to40barMin.operatingdifferentialpressureΔPmin:0.5barFunctionfeaturesAccuracyclassAC:upto±2.5%Lock-uppressureclassSG:upto+5%TemperatureStandardversionWorking-10℃~60℃Ambient-20℃~80℃Lowtemperaturever
6、sionWorking-20℃~60℃Ambient-30℃~80℃MainmaterialsBody,Seat,BonnetA105(SS304,SS316)Valvestem30CrMoVTrimSS316LPadVESPEL(TEFLON)DiaphragmNBR(FKM)ORingFPM&NBRFlowcoefficientValvesizingcoefficientCv:6ValveflowcoefficientCg:180CalculationformulaTodeterminethecapacity,th
7、efollowingformulasmaybeused:GRTRegulatingTechnologyCo.,LtdGRTRegulator13.94PoQn=.Cg.(Pi−Po).Poif≥0.5d(Te+273)Pi6.97PoQn=.Cg.Piif<0.5d(Te+273)Piwith3Qn=flowrateinNm/hPi=inletpressureinbar(a)Po=outletpressureinbar(a)Cg=Valveflowcoefficientd=relativedensity(air=1)T
8、e=temperaturegasintheinletsideoftheregulatorρn=gasdensityundernormalconditions(withT=273Kelvin)Togassesotherthanairapplies:d=ρngas/1.29RelativedensityGasdAir1Naturalg
