... )Materials:body-DI,WCB,Stainless Steel disc-D Double Flange Butterfly Valve:SizeDN40 - DN1200Design StandardAPI 609End flangeEN1092 ,ANSI 125/150# ,DIN2501Face ... operators, electric and pneumatic control actrators.Products;We can produce butterfly valves, check valves, gate valves and so on with the ... the standards of GB, ASME, ANSI, API, BS, DIN Ductile iron Butterfly valve