Gate Valves, Brass Ball Valves, Check Valves manufacturer / supplier in China, offering China Ball Valve Manufacturer 600wog 1/2" Inch - 4" Inch Full Port Heavy Duty Nickel Plating Shut off Brass Ball Valve with O-Ring, Medical Gas Pipeline Shut-off Zone Box Valve, Bronze Swing Check Valve BS 5154 Pn20 Series B Metal Disk and so on.