Internal thread gate valve, also known as cut-off valve, is a widely used industrial valve and is a forced sealing valve. Its closing principle is to use the pressure of the valve stem to make the valve disc sealing surface and the valve seat sealing surface closely fit, thereby preventing the flow of the medium‌12. The internal thread gate valve has a simple structure and is easy to manufacture and maintain. It is suitable for medium, low and high pressure environments, and has small friction between the sealing surfaces during the opening and closing process, making it relatively durable.

Structural features

The opening and closing part of the internal thread gate 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. This design allows the valve to have smaller operating torque when opening and closing, and can be used on pipelines with two-way flow of media.