... stainless steel, Cr .Mo .SteelSeal ring: Stainless steel, multi-layer asbestos with temperature resistantStem: Stainless steel, Cr .Mo .SteelBearing: ... disc more and tighter. With reliable sealing ability and no leakage.c.High pressure resistant, corrosion resistant, wear ... principle, the compatible to soft sealing and metal multi-layer structure, with best machining and advanced technology. And ...