... ,CF8 304,CF8M,CF3,CF3M a) Body:ductile iron,cast iron,stainless steel,carbon steel b) Disc:plated ductile iron,aluminum bronze,stainless ... steel c) Stem:stainless steel d) Seat:NBR,EPDM,FKM and CR4)Standards: a) ... leakage under the pressure test6) Wide selection of materials,applicable for various mediums Cast Steel Triple Offset Butterfly Valve