The closure is ball, the ball is rotated 90° around the axis of the valve stem to achieve the purpose of opening and closing. Open and close without friction. This function completes the problem that the sealing of traditional valves is affected by the friction between the sealing surfaces. It’s mainly used for harsh working conditions that need to overcome strong corrosive environment, such as seawater desalination platform, various types of sea vessels, warships, submarines, offshore drilling platforms and other navigational equipment; And polycarbonate, polyethylene, LDPE, arene, (LNG) refinery supporting facilities. It’s now widely used in fire protection systems, ballast control systems, cooling systems, seawater injection systems, and many other critical systems.