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InherentFlowCharacteristicandRangeabilityofControlValvesReaffirmed19November2002ANSI/ISA–75.11.01–1985(R2002)FormerlyISA–75.11–1985(R1997)AMERICANNATIONALSTANDARDISATheInstrumentation,Systems,andAutomationSociety–TMANSI/ISA–75.11.01–1985(R2002)FormerlyANSI/ISA–75.11–1985(R1997)InherentFlowCharacteristicandRangeabilityofControlValvesISBN:1-55617-826-3Copyright©2002byISA—TheInstrumentation,Systems,andAutomationSociety.Allrightsreserved.Notforresale.PrintedintheUnitedStatesofAmerica.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmittedinanyformorbyanymeans(electronicmechanical,photocopying,recording,orotherwise),withoutthepriorwrittenpermissionofthePublisher.ISA67AlexanderDriveP.O.Box12277ResearchTrianglePark,NorthCarolina27709标准分享网www.bzfxw.com免费下载-3-ANSI/ISA–75.11.01–1985(R2002)PrefaceThispreface,aswellasallfootnotesandannexes,isincludedforinformationpurposesandisnotpartofANSI/ISA-75.11.01-1985(R2002).ThisdocumenthasbeenpreparedaspartoftheserviceofISA�TheInstrumentation,Systems,andAutomationSociety�towardagoalofuniformityinthefieldofinstrumentation.Tobeofrealvalue,thisdocumentshouldnotbestaticbutshouldbesubjecttoperiodicreview.Towardthisend,theSocietywelcomesallcommentsandcriticismsandasksthattheybeaddressedtotheSecretary,StandardsandPracticesBoard;ISA;67AlexanderDrive;P.O.Box12277;ResearchTrianglePark,NC27709;Telephone(919)549-8411;Fax(919)549-8288;E-mail:standards@isa.org.TheISAStandardsandPracticesDepartmentisawareofthegrowingneedforattentiontothemetricsystemofunitsingeneral,andtheInternationalSystemofUnits(SI)inparticular,inthepreparationofinstrumentationstandards.TheDepartmentisfurtherawareofthebenefitstoUSAusersofISAstandardsofincorporatingsuitablereferencestotheSI(andthemetricsystem)intheirbusinessandprofessionaldealingswithothercountries.Towardthisend,thisDepartmentwillendeavortointroduceSI-acceptablemetricunitsinallnewandrevisedstandards,recommendedpractices,andtechnicalreportstothegreatestextentpossible.Sta...