Rubber oil seals have a wide temperature resistance range, from -26℃ to 280℃ for static seals, and up to 290℃ for short periods; -15℃ to 200℃ for dynamic seals; and -60℃ to 250℃ for low-temperature types. Furthermore, perfluororubber can be used continuously from 260℃ to 290℃, withstanding long-term high temperatures of 316℃ and short-term temperatures up to 360℃. Different types of fluororubber oil seals have different temperature resistance ranges due to factors such as the material's inherent properties, the ambient temperature, and oxidation levels. The appropriate seal should be selected based on specific circumstances.
The material's inherent properties significantly affect the temperature resistance range of fluororubber oil seals. Higher polytetrafluoroethylene (PTFE) content generally results in better temperature resistance. Products from different manufacturers vary in performance due to differences in processes and formulations. This is similar to how even among fluororubber oil seals, different manufacturing processes and material ratios can lead to varying temperature resistance.
Ambient temperature is also a crucial factor. Prolonged exposure to high temperatures will gradually decrease the temperature resistance of fluororubber oil seals. Just as a person's energy gradually depletes when working at high intensity for extended periods, the performance of fluororubber oil seals changes over time, particularly in environments like car engines where temperatures remain consistently high.
The oxidizing properties of the operating environment are also significant. Oxidation damages the molecular chain structure of fluororubber oil seals, leading to a decline in their performance. This is similar to how metal rusts over time in the air, altering its fundamental properties.
