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,
With the development of society and economy, the use of valves is becoming more and more extensive, and there are many varieties of valves used in pipelines.
In the automatic control of modern factories, regulating valves play a very important role, and the production of these factories depends on the correct distribution and control of the flowing medium.
Recently, the State Administration for Market Regulation issued Announcement No. 12 of 2022, approving the release and implementation of 20 national metrology technical specifications including