Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve manufacturer / supplier in China, offering Cast Iron Ductile Iron Pn16 10 Inch Wafer Butterfly Valve 10 Inch Rubber Seal Butterfly Valve, PTFE Seat Cast Iron Body Wafer Butterfly Valve with Black PTFE Disc, Soft Sealing 150lb 10K Spraying Coated Disc Wafer Butterfly Valve 4inch 6inch and so on.