... :body-DI,WCB,Stainless Steel disc-D Double Flange Butterfly Valve:SizeDN40 - DN1200Design StandardAPI 609End flangeEN1092 ,ANSI 125/150# , ... DIN2501Face to faceEN 558-1, BS5155 , ISO 5752Top flangeISO 5211BodyDuctile iron,Stainless steel,WCBDiscDuctile iron,CF8,CF8M ... butterfly valves, check valves, gate valves and so on with the materials of ductile iron, carbon steel, stainless steel ...