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- The primary function of a mechanical oil seal is to create a barrier between the rotating shaft and the stationary housing, preventing the escape of oil and other lubricants. This helps to maintain proper lubrication levels within the equipment, reducing friction and wear on moving parts. Additionally, oil seals help to prevent contamination of the lubricant by dirt, dust, and other contaminants that can lead to premature wear and equipment failure.
VMQ (silicone)
When choosing seal materials, it is critical to evaluate the environment and application. Common seal materials include:
Synthetic Rubber Oil Seals - Styrene Butadiene Rubber oil seals, or just SBR oil seals, offer strong resistance to abrasions and lesions, making them an ideal seal for fast-moving machinery. With the ability to withstand extreme temperatures with its heat-aging qualities, they can be used in outdoor components. They are also seen as more cost-effective oil seals than natural rubber.
Shaft and Bore Tolerance
Spark Plug Wire: Essential Component in the Ignition System
Oil seals are always exposed to a lot of chemicals, both mild and harsh chemicals. The seals react by showing some signs like cracks, blisters, and discoloration especially when the chemical is harsh. This clearly shows that the chemical is not compatible with the seal, which goes as far as affecting its cross-link density (increase or decrease). When the cross-link density increases, the seal material becomes harder, but when it decreases, the seal material becomes softer.
Silicone rubber (VMQ)


Oil seal characteristics

different types of spark plugs.
Remove all traces of the old gasket from the pump and engine, using a paint scraper if necessary.


As type A with dust lip
2. Temperature: Just like pressure, it is very important to choose the right seal that can withstand extreme heat or cold temperatures, depending on the operating environment of your application.