FKM rubber is a slightly more expensive rubber raw material. Compared with NBR, FKM rubber has better resistance to high temperature, chemical corrosion and oil. A 75-hardness fluororubber O-ring means that its Shore hardness is 75A, which belongs to the medium hardness range, has both elasticity and durability, and has a high resistance to compression deformation. In the automotive field, 75-hardness O-rings need to take into account both oil resistance and high temperature resistance. The traditional NBR rubber has a temperature resistance range of -20°C to +100°C, which is fully competent in conventional working environments. However, in special high-temperature environments, FKM rubber with strong temperature resistance is still needed. Its temperature range can reach -20°C to +250°C, and it can even withstand a high temperature of 300°C in a short period of time. In extreme environments, FKM rubber will perform even better.
Engine fuel system: Automobile engines are always in a high temperature state when running, and the internal cylinder wall temperature is maintained above 150°C. The joints and connections of the fuel pipes also require sealing rings to play a role. Therefore, the heat-resistant and oil-resistant FKMO rings can take both into account and play an important role in the engine fuel system.
Turbocharger system: There is lubricating oil between the bearing and the shaft seal in the automotive turbocharger system to help the work. An O-ring is also needed in this part to seal the lubricating oil and internal gas. The turbocharger system will produce a large amount of high-temperature exhaust gas, and the temperature is very high. It also requires a sealing ring that is resistant to high temperatures and can seal lubricating oil. The high-temperature resistant FKMO ring can meet these requirements well and provide good sealing for the automotive turbocharger system.
For 75 hardness FKM rubber, if you have higher working environment requirements, we can also change the formula material according to your needs to provide you with the best quality rubber seals.
https://www.yiduautoparts.com/