Opening and closing parts by the media flow and power to open or close on their own, in order to prevent the backflow of the media called the check valve. Check valves are automatic valves, mainly for the medium one-way flow of the pipeline, allowing the media to flow in one direction, to prevent accidents.
Check valve according to the structure, can be divided into lift check valve, swing check valve and butterfly check valve.
Water, Steam, Nitric acid, Acetic acid, Oil, etc
Carbon steel, Stainless steel, Alloy steel, Bronze, etc
The valve is opened/closed by the valve disc moving in a direction parallel to the valve seat hole axis and can only be installed on horizontal pipelines with the major function of preventing medium backflow when shutting down the pump and maintaining the water column required by pumping.
Design & Manufacture: API594, JB/TB8937
Inspection and Test: API598, JB/T9092
Face to Face: API594, API6D, DIN3202, JB/T8937
Flange End: DIN2543-2548, API605, ASME B 16.47, ANSI B 16.5
Pressure-Temperature Rating: ASME B16.34, DIN2410, GB/T9124, HG20625, SH3406, JB/T74