b'TRIPLE OFFSET BUTTERFLY VALVESMODEL SLHBFFS-T 150 TO 2500 CLASS TRIPLE OFFSETPRINCIPLES OF VALVE DESIGN - TRIPLE OFFSETSupersealModelSLHBFFS-T150to2500Classtripleoffsetmetalseatbutterflyvalvesprovideabi-directionalandbubble-tightshut-offwhichisattributedtothegeometryofthetripleoffsetseat.Availableinmetaltometalandmetallaminatedgraphiteseatdesigns.Canalsobeusedforflowcontrollinearflowcharacteristicsbetween90degrees and 70 degrees of opening.Thevalvestemisoffsetfromtheseatarea(1stoffset)andthevalveseatsurfacecentrelineisoffsetagainstthecentrelineofthepipe(2ndoffset)andtheconicalaxisisoffsetfromthevalvecentreline(3rdoffset:inclinedcone).The3rdoffsetcompletelyeliminatesrubbingorscraping.Theseatsurfacesofthebodyandsealringinthistripleoffsetdesign,contactwithaninclinedcone-in-cone,andthisdesignrequiresprecisionseatingtolerancesanddurabilitytoensureaslightprecisionlappedwedge-matingeffect.Inaddition,theangleofcontactbetweenthebodyandseatringprovidesalowopeningandclosingtorqueduetoalmostnowedgingandnoscrapingactiononopeningorclosing(unliketrunnionmountedballvalves).Thiseccentrictripleoffsetdesignprovidesexcellentsealingperformanceandseatdurabilityandithardlyeverneedsrepairundernormalserviceconditions.Theseatdesigncanbeallmetaltometal(optionalresilientmetalseatdesign)ormultiplelaminatedusingresilientmetalalternatedwithoneoreventwoofthefollowinglaminationsdependingonservice:-graphite/aramidfibre/ceramicfibre.Triple Offset DesignDESIGN FEATURES - TRIPLE OFFSET Leakage RatesCharacteristics and Merits LeakageratesrangefromFCI-70ClassExcellentseatdurabilityandlowoperatingtorqueduetonon-rubbingIV,VorVIthroughtozeroleakage.characteristics of triple offset construction.Valvescanbespecifiedto:-Bi-directionalzeroleakageserviceavailable(whenspecified).-API 598 Zero Leakage UnrestrictedselectionoffacetofacedimensionsforAPI,ASME(ANSI),EN,ISOetc.-ISO 5208 Leakage Rate A&perfectinterchangeabilityofgate,ball,plug,highperformancebutterfly,&othervalves.-EN 1866 Lowemissiondesign,quarterturnconstruction,lowoperatingtorque&lowercost. -API 6D10 SUPERSEAL - Butterfly Valves SUPERSEAL - Butterfly Valves 11'