... 2.Reasonable price to get the order 3.Professioal OEM Double Flange Butterfly Valve: SizeDN40 - DN1400Design StandardAPI 609End flangeEN1092 ,ANSI 125 ... control actrators.Products;We can produce butterfly valves, check valves, gate valves and so on with the materials of ductile iron ... standards of GB, ASME, ANSI, API, BS, DIN, JIS etc. double flanged rubber lined butterfly valve