The plug valve is a closing or plunger-shaped rotary valve that opens or closes by opening or closing the passage opening on the valve plug to the passage opening on the valve body by rotating 90 degrees.
Its valve plug can be cylindrical or conical in shape. In a cylindrical valve plug, the passage is generally rectangular; in a tapered valve plug, the passage is trapezoidal. These shapes make the structure of the plug valve light. It is most suitable for use as a cutting and closing medium and a shunt, but it can also be used for throttling depending on the applicable properties and the erosion resistance of the sealing surface.
