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1、300-3011PRESSUREGOVERNORSSERIES300-301GOVERNORSCONFORMINGSPECIFICATIONSUNIEN88-CLASS”A2”FORNATURALGAS,NONAGGRESSIVEGASESANDAIR.FIELDOFAPPLICATIONFiorentinizero-closingpressureregulators,designedandbuilttoUNIEN88classA-group2specifications,canbeusedforallthetypesofgasListedonthesheetDVGWG260/1
2、,fornon-aggressivegasesandforair.TheseregulatorsarewidelyusedinsupplylinesformixedandcombinationbumersandinthepipeddistributionofmethanegasandLPGinbothindustrialandnon-industrialapplications.TECHNICALCHARACTERISTICSTheseregulatorsarethedirect-actingtype,whichmeanstheyregulatethepressurebydire
3、ctlycomparingthethrustderivingfromtheoutputpressurewithapresetload(SPRING).Anypressurevariationsupstreambetweentheminimumandmaxi-mumvaluewhichmightcauseavariationtheoutputpressurearecorrectedbywhatisknownasacompensationdiaphrag,fittedinsidetheregulator.Alltheregulatorsarefittedontheinsidewith
4、apulseconnectorpipeandhaveanRp1/4”threadedconnectorantheinletforapressuretap.Inaddition,alltheregulatorsareequippedwithasafetydiaphragmWithobviatestheforabreatherpipe.SPECIFICATIONS-InletpressurerangeBpu:+2.5mbarto+500mbar;Abovetheoutletnominalpressure-Maxallowablepressure:Ps1bar-Outletpressu
5、rerange:5to300mbar(seespringtable)-Accuracyclass:AC15%ofthePassettingvalue-Pressureclass:SG15%~25%ofthePasetpoint-Fieldofapplication:Naturalgas,non-aggressivegases-Operatingtemperature:-15OC~+60OC-Pressureclass:PN1-Threaded/Flangedseries:DIN2999ISO7/1DIN2633PN.16-Gasfamily:1~2and35MATERIALSBo
6、dyandcoverAluminiumalloyUNI5076/3051DiaphragmsandsealsNitrilicrubberDIN278/3535-1InternalpartsDelrin-aisi304DETERMINATIONFORTHECHOICEOFREGULATORItisessentialtoknowthattheflowratecapcityofaregulatorisnotGOVERNORSdeterminedbythediameteristattachmentsbutbythequantityofthepressuredrop.Inordertode
7、terminethechoiceofregulatoryoumustknowthesethreekeyvalues:-InletpressurePe-OutletpressurePas-FlowrateVTheflowratevaluesshowninthediagramhavebeendeteminedwithamoreunfavourablepressuredrop.MODRPbarLBH1H2H3EC300511/2"110596109332455142300523/4"1
