... GB/T4213-2008, API598Product introductionHB2510 pneumatic piston O type shut-off ball valve is improved on the basis of our several years ... 30k,40kMaterial of parts Body WCB,CF8,CF8M,316L,Hastalloy C PlugWCB,CF8,CF8MStem310S,304,316LPackingPTFE, graphite Sealing ring CGM, ... VI, Bubble tightCertificationWorkshop and production equipmentsOfficeCompany mansion 100A-HB2510 flow control valve ball valve