ISO64031988

*ISOINTERNATIONALSTANDARD6403Firstedition1988-11-01Correctedandreprinted-----~~---_----~---1989-05-01-----INTERNATIONALORGANIZATIONFORSTANDARDIZATIONORGANISATIONINTERNATIONALEDENORMALISATIONMEXaYHAPOfiHAFIOPTAHM3A~MRfl0CTAHflAPTM3AL/MM----~-~-----Hydraulicfluidpower-Valvescontrollingflowandpressure-TestmethodsTransmissionshydrauliques-RhgulateursdedhbitetdePression-MtGtbodesd’essaiReferencenumberISO6403:1988(E)Thisisafree6pagesample.Accessthefullversiononline.ISO6403:1988(ElForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalStandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eschmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,govern-mentalandnon-governmental,inliaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforapprovalbeforetheiracceptanceasInternationalStandardsbytheISOCouncil.TheyareapprovedinaccordancewithISOproceduresrequiringatleast75%approvalbythememberbodiesvoting.InternationalStandardISO6403waspreparedbyTechnicalCommitteeISO/TC131,FluidpowerSystems.UsersshouldnotethatallInternationalStandardsundergorevisionfromtimetotimeandthatanyreferencemadehereintoanyotherInternationalStandardimpliesitslatestedition,unlessotherwisestated.0InternationalOrgankationforStandardkation,1988PrintedinSwitzerlandiiThisisafree6pagesample.Accessthefullversiononline.ISO6403:1988(ElContentsPage0Introduction..........................................................11Scopeandfieldofapplication...........................................12References...........................................................13Definitions...........................................................14Symbolsandunits....................................................25Testinstallation-Generalrequirements.................................25.1Testcircuit......................................................25.2Pressure-andtemperature-sensingPoints............................25.3Filtrationandcontiminationlevel....................................36Generaltestconditions.................................................36.1Testfluid........................................................36.2Testtemperatures................................................36.3Steady-stateconditions...........................................36.4Proofpressure...................................................37Testprocedurefordirectionalcontrolvalves...............................47.1Testcircuit......................................................47.2Steady-statepressuredifferential/flowcharacteristics.................47.3Internalleakage..“...............................................47.4Switchingenvelope...............................................47.5Transientcharacteristics...........................................58Testprocedurefornon-return(check)valves..............................58.1Testcircuits.....................................................58.2Pressuredifferential/flowcharacteristics.............................58.3Pilotpressure....................................................58.4Leakage.........................................................69Testprocedureforvalvescontrollingpressure.............................69.1Testcircuits.....................................................69.2Controlsetting...................................................69.3Pressure-reliefvalves..............................................69.4Pressure-reducingvalves..........................................79.5Unloadingvalves.................................................7...IllThisisafree6pagesample.Accessthefullversiononline.ISO6403:1988(E)IOTestprocedureforflowcontrolvalves..................................10.1Testcircuits..................................................10.2Steady-statefIow/pressurecharacteristics........................10.3Controlsetting................................................10.4Transienttestsonpressure-compensatedvalves...................11Testprocedureforflow-dividingvalves.................................11.1Testcircuit...................................................11.2Steady-stateflow/pressurecharacteristics........................11.3Transienttests................................................12Testreport.........................................................12.1General......................................................12.2Testdata.....................................................12.3Testresults...................................................13IdentificationStatement..............................................7777788889991011Figureslto19....................................................12to27AnnexesAClassesofmeasurementaccu