What are The Common Materials used for High-temperature Oil Seals?

Number of hits：752024-10-31 10:26:33　

　　Oil seals are sealing tools commonly used in devices for sealing rotating or fixed shafts. Their main function is to prevent lubricating oil, liquid, or gas from leaking from the shaft seal and to keep dust, dirt, and other external contaminants out of the mechanical system. As the work is carried out, oil seals usually operate in high-temperature environments. If the material does not meet the standards, it will affect normal operation and equipment safety. Today, let's talk about the common high-temperature-resistant oil seal materials.

　　A more common high-temperature-resistant oil seal material is fluororubber (FKM), which has strong high-temperature resistance. The temperature can be as high as 250℃, and its application scenarios are very rich. Many harsh working environments will prioritize using it. Besides being resistant to high temperatures, this material also has good oil resistance, solvent resistance, weather aging resistance, and chemical medium resistance. For example, it is used in reducers, blowers, overhead cranes, etc., achieving a good sealing effect.

　　The second type is nitrile rubber (NBR), a material resistant to oil, oxidation, wear, aging, and chemical corrosion. Its temperature resistance is around 125℃. Although it is not as high-temperature-resistant as fluororubber, it is cheaper.

　　There is also polytetrafluoroethylene (PTFE), which has good chemical corrosion resistance. Importantly, it is insoluble in organic solvents such as strong acids and alkali, making it better suited for various mechanical equipment. Its heat resistance can also reach up to 260°C, which is suitable for various harsh environmental operations.

　　In addition to the above, many other materials are used for high-temperature-resistant oil seals, such as silicone rubber and polyurethane. Given the wide variety of materials, we will not list them all here. Everyone must choose the appropriate material for the main body of the oil seal according to the application to ensure high efficiency.