Wafer Butterfly Valve: 1) Size: DN40 - DN600 2) Materials: body-CI, DI, WCB, stainless steel disc-DI, CF8, CF8M, ... faceEN 558-1, API 609Top flangeISO 5211 BodyDuctile iron,Stainless steel,WCBDiscDuctile iron,CF8,CF8M,C95400Stem416,420,431,316SeatNBR,EPDMSuitale mediumSewage, ... for handles (DN50 - 300), gear operators, electric and pneumaticcontrol actuators grey iron wafer lug midline butterfly valve