Double Flange Butterfly Valve:1)Size: DN50 - DN14002)Pressure: PN1.0/1.6 ... )Materials:body-DI,WCB,Stainless Steel disc-D Double Flange Butterfly Valve:SizeDN40 - DN1200Design StandardAPI 609End flangeEN1092 ,ANSI 125/150# ,DIN2501Face ... , electric and pneumatic control actrators.Products;We can produce butterfly valves, check valves, gate valves and so on with the materials of ductile iron ...