... and chemical resistance b.High temperature resistance c. Excellent weather and water resistance Butterfly Valve: SizeDN40 - DN1400Design StandardAPI 609End flangeEN1092 ,ANSI ... °COperator:Suitalbe for handles(dn50~300), gear operators, electric and pneumatic control actrators.Products;We can produce butterfly valves, check ... GB, ASME, ANSI, API, BS, DIN, JIS etc. various high quality Butterfly valve