Butterfly Valve, Check Valve, Gate Valve manufacturer / supplier in China, offering Ductile Cast Iron Butterfly Valves with EPDM and PTFE Coatings, DN300 Double Flange Butterfly Valve, Series 14, Seies 13 Russia, Europea, Africa, Btval 50-1200, Cold and Hot Water Treatment Flanged Three-in-One Check Valve One-Way Non-Return Valve and so on.