Butterfly Valve, Gate Valve, Check Valve manufacturer / supplier in China, offering DN100 Pn10 Gear Operated Wafer Lug Double Flanged Ductile Iron Ggg40 China Factory Water Butterfly Valve, OEM DN 50-300 Ductile Cast Iron Handle Operated Wafer Lug Flanged Resilient Seat Butterfly Valve Industrial Valve, China Factory Handle DIN Standard Cast Ductile Iron Ggg50 Wafer Lug Flanged Water Pn 16 Butterfly Valve and so on.