seatsealingwide-brimmeddesigntoachievehighsealingperformance.installationeasywithoutadditionalmountingflangegaskePerformancecharacteristics1.thecenterofthelinearstructure2.valveplateandshafttorelyonaccurateDouble"D"typeflatwedgeconnectionanddrive,noneedtoscrew/pin,higherCvvalue,reliabilityandmoreconvenientdisassembly.3.valveshafttopandbottomofapairofbearingspreventsshaftranrelaxedandstableoperatingtorque.4.seatsealingwide-brimmeddesigntoachievehighsealingperformance.5.seatdistortedintheinstallationanduseofoffsetandweartorelyonthestrengtheningoftheseatbackresthasbeenagoodimprovement.6.allvalvesatthetopoftheplatformareinlinewiththerequirementsofISO521,canbedirectlyinstalledinaccordancewithISO5211requirementsofelectric,pneumaticandotheractuators.7.installationeasywithoutadditionalmountingflangegasket.)