Vulcanizates of several fluoroelastomers, listed in Table 14.1, were exposed to a standard 5W-30 engine oil, ASTM Service Fluid 105, for up to 6 weeks at 150°C (302°F).5 The oil was changed weekly, but was not aerated. Retained elongation was measured after exposure for 1, 2, 3, and 6 weeks; data are shown in Fig. 14.3. The results indicate that bisphenol-cured FKM-A500 VDF/HFP copolymer, FKM-B600 VDF/HFP/TFE terpolymer, and peroxide-cured FEPM-7456 TFE/P/VDF terpolymer lost most of their original elongation over the course of the test exposure, indicating considerable additional cross-linking occurred by reaction with amine- and phenol-containing oil additives. The other fluoroelastomers showed better retention of elongation, being much less susceptible to additional crosslinking. Note that FEPM-7456 contains a high level of VDF (about 30%), while FEPM-7506 contains a relatively low VDF level (10–15%) to serve as cure site for bisphenol curing. The other FEPM types contain no VDF.
2) Special seal types and their features
- In conclusion, the unassuming rubber gasket plays a silent but significant role in countless aspects of modern life. Whether securing a peaceful night's sleep with a quiet HVAC system or ensuring the reliability of industrial machinery, these versatile seals protect against leaks and environmental threats. As we continue to advance technologically, the rubber gasket remains a testament to simplicity and efficiency, proving that sometimes the most effective solutions are those that quietly get the job done behind the scenes.
ERIKS
-50~170 - The material used in oil seals is also important, as it affects the seal's durability and resistance to chemicals and heat
- Do not top up engine oil and do not start the engine until four hours after assembly. This is advised by both Elring and Victor Reinz to allow the new oil seals to form to the shaft.
- Despite these benefits, proper installation and maintenance are crucial for optimal performance. Incorrect installation can lead to seal failure, potentially causing equipment downtime and costly repairs. Regular inspection and timely replacement of worn seals are essential practices to ensure continued reliability.
- Rubber gaskets are an essential component in many industries, ensuring airtight seals and preventing leaks. One popular size for rubber gaskets is the 40mm gasket, known for its durability and versatility. In this article, we will explore the uses and benefits of 40mm rubber gaskets.

mechanical oil seal. This design helps to prevent oil leakage by trapping oil within the seal and redirecting it back into the system. Labyrinth seals are commonly used in high-speed applications where traditional lip seals may fail.
Acrylonitrile-buta-diene natural rubber (NBR - Nitrile)
Fitting an oil seal

(if the housing bore has a shoulder)
To act as a barrier and prevent dirt, contamination and other external entities from entering the system containing the lubricating oil.
EPDM oil seals are less common. They are used in solvent, hot water and steam applications, EPDM resists low temperatures down to -50 °C and UV radiation well. Some types of EPDM are also suitable for higher temperatures up to +150 °C. EPDM oil seals are usually available upon request.