The opening and closing part of the high-pressure stop valve is a plug-shaped valve disc, the sealing surface is flat or conical, and the valve disc moves linearly along the center line of the fluid. The movement form of the valve stem includes the lifting rod type (the valve stem rises and falls, the handwheel does not rise and fall), and the lifting and rotating rod type (the handwheel and the valve stem rotate and rise together, and the nut is set on the valve body). The stop valve is only suitable for fully opening and fully closing, and adjustment and throttling are not allowed.
