1VALVESTYPE&FUNCTIONVALVES2ValvesOn-OffServiceThrottling(Regulating)ServicePreventionofbackflowPressurecontrol(ControlValve)3ON–OFFSERVICE4Gatevalve.5GateValve:-ON–OffValve,Usedin:1-Water.2-Oil.3-Gas4-SteamAndOtherFluidServices.6Wedgegatevalveandparallelslidevalve7Gatevalve2.8Plugvalve(on-off)orCocklow-pressure9Plugvalve(on-off)orCock10PlugvalveApplicationsGasandliquidfuelWater.ExtremetemperatureflowBoilerfeedwater.LowPressureSteam.CorrosiveLiquidsandGases11BallValve(on-off)1213BallValveQuarter-TurnHydraulicsystems.Water.Air.Oil.Petrochemical.Highvolume,highpressureandhightemperatureflow.14THROTTLING(Regulating)SERICE15GlobeValve(Highpressure&value)16GlobeValve.17GlobeValveOps.18NeedleValveFineaccurateflowCont.19ButterflyValveFlowControlLowSpeedBothSideflow2021ButterflyValve222Preventionofbackflow23splitdisccheck24Splitdisccheckvalveoperation25liftcheckvalve(RecommendedforVaporservice)26Swingcheckvalve(liquids)installedhorizontal&vertical27SwingcheckvalveOps.28Pistoncheckvalves29checkvalves30Ballcheckvalve(forheavyfluids)installedhorizontal,vertical&angle31Checkvalve(Ball)32PressureRelivevalves33safetyvalvesandreliefvalvesSafetyvalvesareprimarilyusedwithcompressiblegasesandinparticularforsteamandairservices.Reliefvalvesarecommonlyusedinliquidsystems34PressureReliefValvesReleasesexcesspressuretoprotectsystem.UsewithGases&Vapors&liquid.OpenFullatonceatsetpressure.Outletportlargerthaninletport.Neveradjustwhilstinservice.35TypeofPressureReliefValveSafetyvalve:Usedwithcompressiblegases.steamandairservices.Reliefvalve:Usedinliquidsystems.aspressureoverspilldevices.Safetyreliefvalve:usedeitherforliquidorcompressiblefluid.36PressureRelievevalve(safetyvalve)forcleanairReleasesexcesspressure(cleanair)37Safetyvalve-liquidapplications,opensinproportiontothe38Typicalexamplesofsafetyvalvesusedonsteam&Airsystems3940pneumaticpressurereducing41Controlsystemwouldnormallyconsistofthefollowingcomponents:Controlvalves.Actuators.Controllers.Sensors.42GlobeValve.4344Valvepositions45Orificeplate46pressuregauge