... faceEN 558-1, BS5155 , ISO 5752Top flangeISO 5211BodyDuctile iron,Stainless steel,WCBDiscDuctile iron,CF8,CF8M,C95400,C95500StemSS416,SS420,SS431,SS316SeatNBR,EPDMSuitale mediumSewage ... can produce butterfly valves, check valves, gate valves and so on with the materials of ductile iron, carbon steel, stainless steel to ... the standards of GB, ASME, ANSI, API, BS, DIN Casting iron DN1200 Butterfly valve