According to the structure characteristics and design function of the plug valve, it can be selected according to the following principles.

(1) For medium distribution and change of medium flow direction. Its operating temperature is not higher than 300℃, nominal pressure is PN≤ 1.6Mpa, nominal diameter not greater than 300mm. Multi-channel plug valves are recommended.

(2) Austenitic stainless steel tight-fitting tapered plug valve is recommended for milk, juice, beer and other equipment and pipes in food enterprises.

(3) In the branch pipes of oil field development, natural gas development, pipeline transportation and oil refining cleaning equipment, the nominal pressure class is not more than 300, and the nominal diameter is not more than 300mm. It is recommended to use oil-seal tapered plug valves.

(4) Branch pipe of oil field production, natural gas exploitation, pipeline transportation, oil refining cleaning equipment, nominal pressure class is not more than 7500, nominal diameter is not more than 900mm, operating temperature is not more than 340 ℃. It is recommended to use oil-seal tapered plug valves.

(5) In the large chemical industry, when the pipes and equipment containing corrosive media need to be opened and closed quickly, the nitric acid medium can be sealed by the polytetrafluoroethylene sleeve cone plug valve; crl8nil2m02ti stainless steel inlaid polytetrafluoron sleeve sealed tapered plug valve with acetic acid as medium.

(6) In the pipeline and equipment of natural gas, natural gas and HVAC system, the nominal diameter is not more than 200nm, and the packing taper plug valve is selected. A plug valve is a valve that opens or closes by rotating 90 degrees to connect or detach the port on the plug and the port on the body.

Its stopper may be cylindrical or conical. In a cylindrical plug, the channel is usually rectangular, while in a tapered plug, the channel is trapezoid. These shapes make the construction of the plug valve lighter. Suitable as a cut-off medium and recharge medium, also suitable for shunt, but sometimes depending on the nature of the application and the corrosion resistance of the sealing surface can also be used for throttling.