Plug Valve, Gate Valve, Choke and Kill Manifold manufacturer / supplier in China, offering 6A Wellhead 2-9/16''3000psi Gate Valve with Material 410 Psl3, 6A 4-1/16''3000psi Gate Valve with Material 410, 6A 3-1/16''5000psi Gate Valve with Material 4130 and so on.