Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve manufacturer / supplier in China, offering Suitable for Water Medium D371X Worm Gear Wafer Butterfly Valve, New Designs Widely Used 6.4MPa Class Seawater Corrosion Resistant Butterfly Valve, Good Price Pn16 PTFE Seat Ductile Iron Manual Wafer Type Butterfly Valve and so on.