The plug valve is a closed or plunger-shaped rotary valve. After rotating 90 degrees, the channel port on the valve plug is the same as the channel port on the valve body or separated to complete the opening or closing. It is widely used in oilfield excavation, transportation and Such valves are also needed in scouring equipment and asphalt mixing plants.

　　 The shape of the plug valve of the asphalt mixing plant can be cylindrical or conical. In the cylindrical valve plug, the channel is generally rectangular; and in the conical valve plug, the channel is trapezoidal. These shapes make the structure of the plug valve lighter, and it is very suitable for blocking and connecting the medium and diverting use.

　　 Since the movement between the sealing surfaces of the plug valve has a scrubbing effect, and it can completely avoid the touch with the active medium when it is fully opened, it can generally also be used for medium with suspended particles. In addition, another important feature of the plug valve is that it is easy to get used to the multi-channel structure, so that a valve can obtain two, three, or even four different flow channels, which can simplify the installation of the piping system and reduce the amount of valves. And some connecting accessories needed in the equipment.

Because the cock valve of the asphalt mixing plant is quick to open and close, it is very suitable for frequent operation, and it also reflects the small fluid resistance, simple structure, relatively small size, light weight, easy maintenance, good sealing performance, no vibration, Advantages such as low noise.

　　 When the plug valve is used in the asphalt mixing plant, it will not be restricted by the direction of the device, and the flow direction of the medium can be any, which further promotes its application in the equipment. In fact, in addition to the scope mentioned above, the plug valve can also be widely used in petrochemical, chemical, gas, natural gas, liquefied petroleum gas, HVAC occupations and general industries.