Plug Valve, Gate Valve, Choke and Kill Manifold manufacturer / supplier in China, offering API 6A Wellhead 3-1/8′′3000psi Gate Valve Material Class FF, API 6A Wellhead 3-1/8′′3000psi Gate Valve Material Class Hh, API 6A Wellhead 3-1/8′′5000psi Gate Valve Material Class AA and so on.