The high-temperature resistance range of rubber seals typically falls between -50°C and 300°C, depending on the specific rubber material and additives used.
Common high-temperature resistant rubber materials include fluoroelastomer (FKM), silicone rubber (VMQ), and perfluoroelastomer (FFKM). Among these, FKM can withstand temperatures of 200°C to 250°C, VMQ can handle 250°C to 300°C, and FFKM is capable of long-term operation at temperatures exceeding 300°C.
The high-temperature performance of rubber seals is influenced by various factors, such as the material's chemical structure and the use of fillers and plasticizers. Due to its excellent heat resistance and chemical stability, FKM is widely used in sectors such as automotive, aerospace, and petrochemicals. Silicone rubber, valued for its flexibility and oxidation resistance, is frequently used in food processing and medical devices. Although FFKM is expensive, it performs exceptionally well in environments characterized by extreme heat and chemical corrosion.
When selecting rubber seals, other factors such as compression set, media resistance, and mechanical strength must also be considered. In high-temperature environments, seals may undergo hardening, cracking, or a loss of elasticity; therefore, regular inspection and replacement are recommended to ensure sealing integrity.