... ,CIDiscDuctile iron,CF8,CF8M,C95400Stem416,420,431,316,304SeatNBR,EPDM,PTFE,RPTFESuitale mediumSewage, Sea water, Air, Foodstuff and Oilproduct specificationface to ... .PTFEpackingPTFE+FPMPTFE+FPM gasketFlexible graphite+PFTE+FPMboltA193-B8A193-B8Msuitable mediumwater,oil,steamnitric acidancetic acid worm gear ball valve