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1、ThePiston-typeSteampressurereducingvalveInstructionmanual5Configurations:1Lowercover7Pistonring13Diaphragm2Body8Cylinder14Adjustingspring3Mainvalvespring9Secondaryvalvespring15Valvecap4Mainvalveseat10Upperbonnet16Adjustingscrew5Mainvalve11Secondaryvalve17Topc
2、ap6Piston12SecondaryvalveseatMainperformanceanduses:Y43Hisprincipallyusedinsteampipe,itcanreducetheinletpressuretoacertainoutletpressureyouneedbyadjustingthe5spring,whentheflowandthepressureoftheinletvaries,theoutletpressurecanalsoremainwithinacertainrangebyt
3、hestrengthofthemediumitself,butthedifferentialpressureoftheinletandoutletmustbeequalorgreaterthan0.2MPa.Technicalparameter:DN(LB)Pressuretest(MPa)Pressure-adjustrange(MPa)ApplicableTemperature℃ShelltestSeattestImportpressureexportpressureexportdeviation3007.5
4、5.52.50.5～1.6≤±0.7≤250Workingprincipal:Whenthepressurereducingvalveleavesthefactory,theadjustingspringisinuncompressedstate,themainvalvediscandsecondaryvalvediscisincloseposition.Whenyouwanttouseit,youcanturntheadjustingscrewclockwise;thiscancompresstheadjust
5、ingspring,movethediaphragmdownandthenopenthesecondaryvalvedisc,themediumalsoentersabovethemainvalveseatthrough“a”holeto“b”hole,makethemainvalvediscopenandthenentersunderthediaphragmthrough“c”hole.Butwhenthedownstreampressureisexceedtheset5pressure,themediummo
6、vesthediaphragmupandcompressesadjustingspring,andthenthesecondaryvalvediscclosesslowly,becausetheflowreduces,thedownstreampressuregetanewbalance,ontheotherhand,whenthedownstreampressureislessthanthesetpressure,thegapbetweenthemainvalvediscandthemainvalveseati
7、ncreasesandthentheflowincreasestooandthenmakethedownstreampressuregetanewbalance.Installationandmaintenance:1.Cleanthevalveandthepipelineandremovethedirtbeforeinstallation,atthesametimethevalvemustbeinstalledinhorizontaldirection,bracketisneededwhenthevalvede
8、adweightisheavyorvibrationexistsatthesite.2.Whileinstalling,makesuretheflowdirectionandthedirectionmarkedonvalvebodyisconsistent,andabypasspipeisusuallyrequired.Whenthevalvesizeandthepipe
