What is a plug valve?

The plug valve is a closing member or plunger-shaped rotary valve. By rotating 90 degrees, the channel port on the valve plug communicates with or separates the channel port on the valve body, thereby realizing opening or closing.
The shape of its valve plug can be cylindrical or conical. In cylindrical valve plugs, the channels are generally rectangular; in tapered valve plugs, the channels are trapezoidal. These shapes make the plug valve lightweight in construction. It is most suitable for cutting off and connecting the medium and diverting the flow, but depending on the applicable properties and the erosion resistance of the sealing surface, it can sometimes be used for throttling.