In the high temperature environment, the choice of seals is very important. Sealing materials that are not suitable for high temperatures may lead to reduced sealing performance, accelerated aging, and even failure. Therefore, it is important to know how to choose seal materials suitable for high temperature environments. This article will introduce several common sealing materials suitable for high temperature environments and the factors to consider when choosing.
1. Polytetrafluoroethylene (PTFE)
Advantages: PTFE has excellent high temperature resistance and can operate stably in the temperature range from -200°C to +260°C. It also has good corrosion resistance and low friction coefficient, suitable for a variety of chemical media.
Application scenario: PTFE seals are suitable for high temperature, high pressure, chemical corrosive environment, such as chemical equipment, automotive engines, valves, etc.
2. Silicone
Advantages: Silicone rubber has good high temperature resistance and can work in the range of -60°C to +230°C. It also has excellent elasticity and aging resistance, and can maintain sealing performance for a long time.
Application scenario: Silicone rubber seals are suitable for high temperature and low temperature alternating environment, such as automobile engine, water heater, oven and so on.
3. Fluorine rubber (FKM)
Advantages: Fluororubbers have excellent resistance to high temperature and chemical corrosion, and can operate in the temperature range of -20°C to +200°C. It also has good oil resistance and solvent resistance.
Application scenario: Fluoro rubber seals are suitable for high temperature, high pressure, and strong chemical corrosion environment, such as automotive engines, hydraulic systems, and chemical pipelines.
Note on selection:
Working temperature range: Ensure that the working temperature range of the selected sealing material meets the requirements of the actual application environment.
Corrosion resistance: According to the chemical properties of the medium, the sealing material with good corrosion resistance is selected.
Pressure requirements: Select the appropriate sealing material according to the actual working pressure to ensure reliable sealing performance.
Sealing performance: The sealing performance of the seal is a key factor in the selection, ensuring that the selected material has good sealing performance.
To sum up, the selection of sealing materials suitable for high temperature environment needs to comprehensively consider the temperature resistance, corrosion resistance, sealing performance and other factors of the material to ensure the stable operation and safety of the equipment in a high temperature environment.