b'LINED BUTTERFLY VALVESMODEL 2014 / 2016 - HU-1 (PINLESS)SEAL CONSTRUCTION & FEATURES ShaftweathersealISO 5211 ActuatorStrong precision key flangeaccommodates gives positiveall types of operators:attachmentfor handle, gear, electricmanualleveror andpneumaticactuator (Square or actuators. Double D).Pressure surge seals* aremouldedLuberizedbushingsgiveintegrally insidestemsupportat the seat shaft holeactuatormountingandarea.These ringsimmediatelyoutwardbelowdiscareof seat.materiallycompatiblewiththeseatto provide failsafe sealing aroundstem, eliminating possible leakage.The phenolic backed* seat is non-collapsible,Valvesavailablewithstretch resistant andbothwaferandlugblowoutproof.Easily type bodies.Fully lined fieldreplaceable. body in a broad range ofmaterials-includingPolisheddiscflats Teflon.matewithseatflatsto give a highly efficientseal:preventsleakageintothestem Pinless design disc.area.Precisionprofiledisc Alignmentfeaturesallowprovides bubble-tighteasyinstallationbetweenshutoffwithminimal pipelineflanges;areal disc/seat interference,installation cost saver. assuringminimum (Body style 2014A, 2016)torque and longer seat lift.Supportedstemsealprotects against distortion,acommon O-Ring preventscauseofstemleakagefromstem.leakage.The disc is precisionPinless DiscSUPERSEALCONSTRUCTIONmanufacturedtoclose Themodernseatanddisc The superseal seat design* has a Precisionmachineddiscedgeandshaftflats.tolerances on the O.D.design insures positive sealingmuchsmallermassofelastomer Bonded distortion proof seat, close andtheflats.Seating whilemaintaininglowseating whichcanswell,inturntorque tolerances.edge is a polished halftorque. The superseal designis controlled to a reasonablePositive shaft seals.ball for torque control.extendsseatlifebyeliminating degree.any bunching or tearing.Lowpotentialofseatswell.The disc is pinless design. Controlled torque by design superiority.TRADITIONAL CONSTRUCTIONThe conventional discThe conventional design reliesElastomersaresubjecttoswellingNon-precisiondiscdimensions.has been sanded toon distortion and bunching offromfluidabsorptionwhichcan Seat distorts during installation and removerougharea,the seat to achieve a bubble tightincreasethemassoftheseat.This operation.precisedimensionsare shutoff.Seat life is decreasedincrease can and often does causeShorter seat life.notmaintained. causinghighermaintenancecost excessivelyhighseatingtorque. Higher torque due to bunching and andincreaseddowntime. Seat life is shortened. potentialswelling.*Design varies according to size, rating and material specifications.22 SUPERSEAL - Butterfly Valves SUPERSEAL - Butterfly Valves 23'