Butterfly Valve, Check Valve manufacturer / supplier in China, offering Duo Double Door Check Valves Flow Control for Sea Water Oil Gas Pressure Reducing, 24 Inch DN600 PTFE/PFA Coated U Section Flanged Butterfly Valves for API609, Pipe Resilient Stop Gate Valves with Handwheel Gearbox Wras Approed for Potable Water JIS 10K and so on.