Wafer Butterfly Valve, Flanged Butterfly Valve, Lug Type Butterfly Valve manufacturer / supplier in China, offering High - Performance Stainless Steel Worm Gear Operated U Type Flange Butterfly Valve, DN50-DN2200 Gearbox Double Flange Butterfly Valve for Fluid Control, High - Performance Anti - Corrosion Stainless Steel Check Valve for Petrochemical Pipeline Networks and so on.