b'AGW SERIESA GW S E R I E SINSTALLATIONInadditiontothecompactshape,SUPER-CHECKValvescanbeinstalledeitherhorizontally or vertically.ANON-SLAM DSUPERCHECKisanon-slamcheckvalvebecauseitoperatesonflowcessation,notflowreversal.Thenormalpositionoftheplatesisclosed,heldagainsttheseatbytheuniquespringdesign.Asflowbegins,theheelsofthetwoplatesareliftedoff Btheseatfaceonthecentralrib.Thecrackingpressureislessthan21kPa(3psi)acrossmostoftherange(largersizesandhigherclassesareproportionatelyhigher).Asflowincreases,theplatesthenpivotagainstthespringpressure.Sincetheheelshavealreadyliftedofftheribseatthereisnoscruborwear,eitherontherib,bodyorplateseatingsurfaces.Apressureofonly28kPa(4psi)isrequiredtokeeptheplatesfullyopenin150class,proportionatelyhigherinotherclassesandlargersizes.(Lightspringsalsoavailable)Whenflowstopsandpressureceasesthespringclosestheplates.FlowreversalisthenstoppedbytheclosedSupercheckvalveandanybackpressureonlyservestomake the valve seal more tightly.Operating Temperature Range for Seal MaterialsMaterial Operating Temperature C SHOCK BUMPERSEPDM -18to110 The problem:Competitive Buna-N -57to120 designsdonothaveshockbumpers.Neoprene -40to120 Thesolution:TheSupercheckMetal* -267to537 designwhererequiredinlarger(AsBody) sizes(&higherclasses)usesViton-A (FKM) -40to204 shockbumpersonthebackofViton-B -29to200eachdisc.ThesebumpersmeetThetemperaturerangeisageneralguide.Astemperatureincreasethepressureratingofthevalvedecreases.Askforpressure/temperaturechart. whenthevalveisinthefullopenposition,*Dependantonbodymaterial. thuspreventingthediscsfromstrikingthestoppin.ThisarrangementreducestheSpring Temperature shockforceonthehinges;ensuringinter-Spring Material Maximum nal components have an extended cycle Temperature CType 316SS 120 lifewithminimalwearunderthemostInconel x 750 severe service conditions.(Heat treated) 537Independent Torsion Springs Retainerless Body DesignonlargesizesrespondEliminatespotentialleak quicklytofluctuationsinflowpathstotheoutsideanda velocitystrongercasting. Inconel X750 SpringsarestandardonallCarbonSteelandmostStainlessSteelbodies.Split Dual Disc Designminimisespressuredropandshortensthedistanceeachdisctravels.Shock BumpersSlim Plate Design stopdiscsandkeepsthemstablepreventingunnecessary(all sizes) stressonthecheckvalve22 SUPERCHECK - Check Valves - Wafer Style'