Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve manufacturer / supplier in China, offering DIN Pn16 API 150lb En593 JIS 10K Wafer Center Line Butterfly Valve, DIN API En593 JIS Standard Rubber Lining Wafer Center Line Butterfly Valve, PTFE Coating CF8m Disc Double Shaft Industrial Wafer Butterfly Valve and so on.