It is a type of valve that has a curtain-shaped closure arrangement by means of a slide and is connected to the pipe and used to interrupt the flow of fluid in the pipe. Thanks to the screw shaft mounted inside the body, the slider is moved up and down and the opening and closing of the valve is realized. Sealing is provided by bushes mounted on the body and the slide. They are used in non-corrosive liquids and liquid fuel installations. It is not used for control purposes and flow adjustment.