Refrigeration Valve manufacturer / supplier in China, offering 15-80mm Butt Welding Angle Ammonia Refrigeration Expansion Check Valve, DN80-DN400 Slip-on Flange Straight Through Ammonia Refrigeration Check Valve, Ammonia Refrigeration Outlet Pressure Regulating Valve – Stainless Steel, Flanged, High Pressure Control Valve and so on.