It is a type of valve used to interrupt the flow of fluid in the pipe by connecting to the pipe with a curtain-shaped shut-off arrangement by means of a slide. 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 slider. They are used in non-corrosive liquids and liquid fuel installations. It is not used for control purposes and flow adjustment.