b'LINED BUTTERFLY VALVEMODEL 2014-HP2 / 2016-HP2SEAL CONSTRUCTION & FEATURES - PINLESS DESIGNShaftweatherseal Strong precision key gives positiveattachmentfor Actuatorflange manualleveror accommodatesall actuator.types of operators: handle, gear, electricLuberizedbushingsgiveandpneumaticstemsupportat actuators. actuatormountingandimmediatelyoutwardof seat.Pressure surge seals* aremoulded integrally inside the seat shaft holePrecision taper pins area.These ringsensure positive,belowdiscarevibrationproof,stemtomateriallycompatible disc connection.Easily withtheseattofieldreplaceable. provide failsafe sealing(Pinless design available)aroundstem, eliminating possible leakage. Valvesavailablewithbothwaferandlugtype bodies.Fully lined The vulcanised andbody in a broad range tongue and groovedofmaterials-includingseat is non-collapsible,Teflon.stretch resistant and blowoutproof.Easilyfieldreplaceable. Onepiecethru-stemdesign ensuresdependability andpositive disc control.Polisheddiscflatsmatewithseatflats Alignmentfeaturesto give a highlyalloweasyinstallationefficientseal:prevents betweenpipelineflan-leakageintothestem ges; a realarea. installation cost saver. (model2014AHP2&2016HP2)Precisionprofilediscprovides bubble-tight shutoffwithminimaldisc/seat interference, assuringminimum Axialbearingpreventstorque and longershaft overload.seat lift.Supportedstemseal Vulcanisedtongueandprotects againstgrooved seat.distortion,acommoncauseofstem leakage.The disc is precisionThemodernseatanddisc The superseal seat design* has a Precisionmachineddiscedgeandshaftflats.SUPERSEALCONSTRUCTIONmanufacturedtoclose design insures positive sealingmuchsmallermassofelastomer Bonded distortion proof seat, close tolerances on the O.D.whilemaintaininglowseating whichcanswell,inturntorque tolerances.andtheflats.Seating torque. The superseal designis controlled to a reasonablePositive shaft seals.edge is a polished halfextendsseatlifebyeliminating degree.Vulcanised-grooved Lowpotentialofseatswell.ball for torque control. any bunching or tearing. and/or hard back seat design.Controlled torque by design superiority.The conventional design reliesElastomersaresubjecttoswellingNon-precisiondiscdimensions.TRADITIONAL CONSTRUCTIONThe conventional discon distortion and bunching offromfluidabsorptionwhichcan Seat distorts during installation and has been sanded tothe seat to achieve a bubble tightincreasethemassoftheseat.operation.removerougharea,shutoff.Seat life is decreasedThis increase can and often doesShorter seat life.precisedimensionsare causinghighermaintenancecost causeexcessivelyhighseatingnotmaintained. andincreaseddowntime. torque. Seat life is shortened. Higher torque due to bunching and potentialswelling.*Design varies according to size, rating and material specifications. Larger sizes have a backing seat.Thisbrochureisgeneralinitsnatureanddesignissubjecttochangeatanytimewithoutnotice.32 SUPERSEAL - Butterfly Valves'