Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve manufacturer / supplier in China, offering Ductile Iron Stainless Steel CF8 CF8m Tungsten Carbide Disc Plate Butterfly Valve, High Performance API609 Ductile Iron Lug Type Butterfly Valve with SS304 Disc, China Factory API609 4 Inch Manual Ductile Iron Lug Type Butterfly Valve with SS316 Disc and so on.