... seat and sealingsurface. The third eccentric “c” is an eccentric angle β, which uses the cam effect to realize theno-friction contact ... of parts Body WCB,CF8,CF8M,316L DiscWCB,CF8,CF8MStem310S,304,316LPackingPTFE, graphite Sealing ring CGM,316LFluid temperatureHigh temp. 1- ... ,VI, Bubble tightCertificationWorkshop and production equipmentsOfficeCompany mansion HB2416 Pneumatic Butterfly control valve