Valves, Ball Valve, Gate Valve manufacturer / supplier in China, offering GB/GOST/API 6D Cast Steel Wcb Ggg-50 2′′4′′5′′6′′8′′10′′12′′ DN50/100/150/200/250/300 Dual Plate/Swing/H41/H44check Valve for Industrial Water Filter Syste, GB/GOST/ANSI B16.5/BS 5351 Cast Steel 2′′ 3′′ 4′′ 6′′ DN50/80/100/150 Floating Ball Valve, Ball Valve GB/T China Valve Stainless Steel Wcb 4′′ 6′′ 8′′dn50/80/100/150/200/300 Special for Fireproof and Anti-Static Chemical Products Ball Valve Steam Turb and so on.