BRITISHSTANDARDBS5157:1989SpecificationforSteelgate(parallelslide)valvesUDC621.646.5:669.14:001.4:620.1BS5157:1989ThisBritishStandard,havingbeenpreparedunderthedirectionofthePipingSystemsComponentsStandardsCommittee,waspublishedundertheauthorityoftheBoardofBSIandcomesintoeffecton31July1989©BSI04-1999FirstpublishedDecember1974FirstrevisionJuly1989ThefollowingBSIreferencesrelatetotheworkonthisstandard:CommitteereferencePSE/7Draftforcomment87/72143DCISBN058017297XCommitteesresponsibleforthisBritishStandardThepreparationofthisBritishStandardwasentrustedbythePipingSystemsComponentsStandardsCommittee(PSE/-)toTechnicalCommitteePSE/7,uponwhichthefollowingbodieswererepresented:AmalgamatedUnionofEngineeringWorkersAssociatedOfficesTechnicalCommitteeAssociationofBronzeandBrassFoundersAssociationofBuildingComponentManufacturersLtd.BritishChemicalEngineeringContractorsAssociationBritishCompressedGasesAssociationBritishFoundryAssociationBritishGasplcBritishMaritimeTechnologyBritishShipbuildersBritishValveandActuatorManufacturersAssociationLtd.CharteredInstitutionofBuildingServicesEngineersCopperDevelopmentAssociationCopperTubeFittingsManufacturers’AssociationDepartmentoftheEnvironment(PropertyServicesAgency)ElectricitySupplyIndustryinEnglandandWalesEnergyIndustriesCouncilEngineeringEquipmentandMaterialsUsers’AssociationGAMBICA(BEAMALtd.)HealthandSafetyExecutiveInstituteofBritishFoundrymenInstitutionofChemicalEngineersInstitutionofGasEngineersInstitutionofMechanicalEngineersInstitutionofWaterandEnvironmentalManagement(IWEM)SocietyofBritishGasIndustriesSteelCastingResearchandTradeAssociationWaterAuthorities’AssociationWaterCompanies’AssociationThefollowingbodywasalsorepresentedinthedraftingofthestandard,throughsub-committees:CombustionEngineeringAssociationAmendmentsissuedsincepublicationAmd.No.DateofissueCommentswww.bzfxw.comBS5157:1989©BSI04-1999iContentsPageCommitteesresponsibleInsidefrontcoverForewordiiiSection1.General1.1Scope11.2Definitions11.3Valvepatterns11.4Sizeran...
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