Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve manufacturer / supplier in China, offering DN50 Pn10 Pn16 EPDM NBR Water Stainless Steel Wcb Semi Full Lug Butterfly Valve, Pn16 Casting Steel Body Rubber Lined Lug Butterfly Valve, ASME 16.5 Nylon Coated Disc Lug Type Butterfly Valve Worm Gear Operated and so on.