b'LINED BUTTERFLY VALVEMODEL 2014-HP / 2016-HPSEAL CONSTRUCTION & FEATURESShaftweatherseal Strong precision key gives positiveattachmentfor Actuatorflange manualleveror accommodatesall actuator.types of operators: handle, gear, electricLuberizedbushingsgiveandpneumaticstemsupportat actuators. actuatormountingandimmediatelyoutwardof seat.Pressure surge seals* aremoulded integrally insidePrecision taper pins the seat shaft holeensure positive,area.These ringsvibrationproof,stemtobelowdiscaredisc connection.Easily materiallycompatible fieldreplaceable. withtheseatto(Pinless design available)provide failsafe sealing aroundstem, eliminating possible leakage. Valvesavailablewithbothwaferandlugtype bodies.Fully lined The phenolic backed*body in a broad range seat is non-collapsible,ofmaterials-includingstretch resistant andTeflon.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.Supportedstemsealprotects against distortion,acommoncauseofstem leakage.SUPERSEALCONSTRUCTIONThe disc is precisionThemodernseatanddiscdesignPrecisionmachineddiscedge&shaftflats.manufacturedtoclose insurespositivesealingwhile The superseal seat design*Bonded distortion proof seat, close tolerances on the O.D.maintaininglowseatingtorque. hasamuchsmallermassof tolerances.andtheflats.Seating Thesupersealdesignextendsseat elastomerwhichcanswell,in Positive shaft seals.edge is a polished halflifebyeliminatinganybunching turn torque is controlled to a Lowpotentialofseatswell.ball for torque control. or tearing. reasonable degree.Controlled torque by design superiority.TRADITIONAL CONSTRUCTIONThe conventional design reliesElastomersaresubjecttoNon-precisiondiscdimensions.The conventional discon distortion and bunching ofswellingfromfluidabsorption Seat distorts during installation and has been sanded tothe seat to achieve a bubble tightwhichcanincreasethemassof operation.removerougharea,shutoff.Seat life is decreasedthe seat.This increase can andShorter seat life.precisedimensionsare causinghighermaintenancecost oftendoescauseexcessively Higher torque due to bunching and notmaintained. andincreaseddowntime. high seating torque. Seat life ispotentialswelling.shortened.*Design varies according to size, rating and material specifications.26 SUPERSEAL - Butterfly Valves SUPERSEAL - Butterfly Valves 27'