Butterfly Valve: Feature Type : Wafer Type Design Size Range : 50mm To 400mm & Above On Request Pressure Rating : 150# & 300#. Ends : Flanged Ends, Sandwich Type. Mfg. Std.: BS-5155, AWWA, MSSSP67 Testing : BS-6755-1 Material of Constructin : Cast Iron (IS 210 GR. FG 220) Cast Carbon Steel (ASTM A 216 GR. WCB, ASTM A 217 GR. WC6, WC9), Cast Stainless Steel (ASTM A 351 GR. CF8, CF8M, CF3, CF3M), Alloy 20 To ASTM A 351 GR. CN7M.