Ball Valves, Gate Valves, Globe Valves manufacturer / supplier in China, offering J-Valves API 6D Duplex Stainless Steel Dbb Threaded Gas Control Nace Mr0175 for Sour Service &Fire Safe Corrosion Resistant Ball Valve, J-Valves Nace & API 6D 6" 600lb Rtj A105n Flanged Carbon Steel/Duplex Stainless Steel Dbb Fire Safe API 607 Ball Valve, Forged Steel/Stainless Steel/3PC F304/F316 Trunnion Ball Valve and so on.