Selecting a suitable plug valve requires comprehensive consideration of working conditions, media characteristics and operating requirements.

The following are key factors and recommendations for selecting plug valves:
1. Select the applicable medium of the plug valve according to the medium characteristics：

This valve is usually suitable for gas, liquid, steam and medium containing suspended particles or corrosive media. When selecting, ensure that the valve material can meet the chemical characteristics of the medium.
2. Select the plug valve according to the working temperature and pressure:
# Pressure level: Select a plug valve that matches the system pressure to ensure that it can withstand the highest pressure under the working conditions. - Common pressure levels include PN10, PN16, PN25, etc.
# Temperature range: Select high-temperature resistant or low-temperature resistant materials according to the medium temperature, such as
1) High temperature conditions: Select high-temperature resistant alloys or high-temperature sealing materials.
2) Low temperature conditions: Select low-temperature steel or low-temperature resistant seals.
3. Select the plug valve according to function and structure:
# Standard plug valve: Suitable for general flow control and cut-off.
# Three-way or four-way plug valve: Suitable for conditions that require switching flow direction or mixing and diversion.
# Lubricated plug valve: suitable for frequent operation conditions, reducing friction through lubrication.
# Non-lubricated plug valve: suitable for occasions with no pollution requirements, such as food and pharmaceutical industries.

4. Select plug valve according to the connection method:
1) Flange connection: suitable for medium and high pressure or large pipelines, with high connection reliability.
2) Thread connection: suitable for small diameter and low pressure occasions, simple installation.
3) Welding connection: suitable for high temperature, high pressure and no leakage requirements.
5. Select plug valve according to the installation environment:
1) Outdoor environment: the anti-corrosion and waterproof performance of the valve needs to be considered.
2) Special working conditions: such as explosion-proof occasions, explosion-proof electric or pneumatic plug valves should be selected.
6. Other selection considerations of plug valves: Such as sealing performance, size and weight, standards and certifications, etc.
In summary, the selection of plug valves should be comprehensively considered from multiple aspects such as medium characteristics, working conditions requirements (pressure, temperature), structure type, and operation mode. Reasonable selection can not only meet the use requirements, but also extend the life of the equipment and improve the system operation efficiency. If you are not sure about the selection, you can consult a professional valve manufacturer or technical support personnel.