Check valve refers to a valve that automatically opens and closes the valve flap by relying on the flow of the medium itself to prevent the backflow of the medium.
On August 2, the special hot work of No. 149 valve room of the second line of the national pipeline network from west to east was held in Changjiang Village, Chijiang Town, Dayu County.
Welding slag, rust, slag, etc. in the pipeline cause blockage or jam in the throttle, guide part, and balance hole of the lower
bonnet, resulting in strain and scratches on the curved surface of the valve core,