Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve manufacturer / supplier in China, offering High Pressure Temperature 150lb 300lb Metal Seal Flange Type Butterfly Valve, Worm Gear Operate ASTM A216 Wcb Three Eccentric Metal Seal Flange Type Butterfly Valve, Di Ci Wcb Stainless Steel CF8 CF8m Flange Type Y Strainer and so on.