Polytetrafluoroethylene gasket is a common sealing material, which has excellent temperature resistance, chemical corrosion resistance and wear resistance, and is widely used in various chemical, petroleum, electric power, pharmaceutical, food and other industrial fields. However, there are many kinds of PTFE gaskets in the market, and the quality is uneven. How to choose the PTFE gasket suitable for your own use needs to consider the following factors.1. Background and application: The quality and selection of PTFE gasket should be determined according to the application background and purpose. For example, in the extreme working conditions of high temperature, high pressure, high speed and corrosive media such as strong acid, strong alkali and organic solvent, it is necessary to select high-quality PTFE gasket to ensure its long-term stability and service life.2. Sealing performance requirements: Considering the sealing performance of PTFE gasket in operation, it is necessary to determine its applicable parameters such as pressure, temperature and medium type. For high-pressure, high-temperature and expandable media, PTFE gasket with high strength and density is selected; For long-term sealing in low-temperature medium, PTFE gasket with good flexibility and stable sealing performance should be selected.3. Material quality: When purchasing PTFE gasket, we should pay attention to its material quality, which is related to the service life and work of PTFE gasket.