Marine Valve, Gate Valve, Check Valve manufacturer / supplier in China, offering JIS F7314 20K Factory Direct Sale Seawater Corrosion Resistant Flange Connection Marine Cast Steel Right Angle Stop Valve, JIS F7314 20K Seawater Corrosion Resistant Flange Connection Marine Cast Steel Right Angle Stop Valve, Cast Iron Gate Valve with a 10K Flange Connection JIS F7364 and so on.