... BS,API 2.DN40-DN1200 3.PN10/PN16/PN25 4.Center lined disc 5.Light weight, cost-effective Technical DataDN40-DN1200mm ... , Stainless SteelSeat: EPDM, PTFE, NBR,VitonStem: Stainless Steel, Steel,Disc: Ductile Iron with Nickel Coating,Ductile Iron with Nylon Coating ... ensure the maximum shaft support and centralized alignment360°polished disc assures positive on-offHard-Backed Cartridge seat or Edge- ...