- The key advantage of silicone oil seals lies in their resilience and durability. Silicone, as a material, is known for its ability to maintain flexibility over a broad temperature range, from -100°C to 200°C. This makes it ideal for applications where extreme temperatures are common, such as in automotive, aerospace, and chemical processing industries. The oil component further enhances the seal's lubricating properties, reducing friction and wear on mating surfaces.
- Manufacturing oil seals begins with the selection of raw materials. High-quality rubber compounds, such as nitrile butadiene rubber (NBR) or fluoroelastomers, are commonly used due to their excellent resistance to oils and fuels. Metal components, typically steel or stainless steel, are also incorporated for reinforcement and durability. Some seals may also include PTFE (Teflon) for enhanced chemical resistance.
Figure 3: Sealing function of main lip radial load
* KOYO is a registered trademark of JTEKT.
Figure 4 shows the features of a JTEKT oil seal.
Advantages of Rubber Valve Cover Gaskets
When choosing seal materials, it is critical to evaluate the environment and application. Common seal materials include:
Oil Seals From Global O-Ring and Seal
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.
Car Iridium Spark Plug: Advantages and Performance
In conclusion, spark plug wires and new spark plugs are essential components in the ignition system of internal combustion engines, contributing to the efficiency, performance, and reliability of the vehicle. Understanding the significance of these components and their proper maintenance and replacement is crucial for optimizing the performance and longevity of the vehicle's ignition system.
As type B with dust lip
