Butterfly Valve, Check Valve manufacturer / supplier in China, offering API Stainless Steel Check Valve Wafer Dual Plate Swing Type, Stainless Steel CF8/CF8m Cast Iron Ci Di Ss A351 CF8m Disc Standard Flap Spring Duo Wafer Check Valve, Double Eccentric Double Flanged Butterfly Valve En558 Series 13 and Series 14 and so on.