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- Polyurethane (PU): Polyurethane seals offer excellent abrasion resistance and durability. They are suitable for high-pressure applications and provide good resistance to hydraulic oils. Polyurethane oil seals are often used in hydraulic and pneumatic systems.
Aspects to consider when selecting oil seals
- Replacing the top valve cover gasket is a routine maintenance item that should not be neglected. While it’s a relatively simple task that can be performed by a skilled do-it-yourselfer or a professional mechanic, it requires precision While it’s a relatively simple task that can be performed by a skilled do-it-yourselfer or a professional mechanic, it requires precision
While it’s a relatively simple task that can be performed by a skilled do-it-yourselfer or a professional mechanic, it requires precision While it’s a relatively simple task that can be performed by a skilled do-it-yourselfer or a professional mechanic, it requires precision
top valve cover gasket. The gasket must fit perfectly to execute its sealing duties effectively. Ignoring this replacement can result in the aforementioned issues, turning a minor repair into a major expense.
- Housing bore diameter
• Low-friction torque design
Installation Techniques
U-Shaped Silicone Gasket: Applications and Advantages
Oil seal material

The basic principle of an oil seal is fairly straightforward. It is installed adjacent to the bearing, with the flexible lip against the rotating shaft and the casing pressed into the housing to hold the seal in place. It’s important that the sealing lip is lubricated to prevent it from overheating as a result of any generated friction. It’s also crucial to understand which type of seal is appropriate for your particular machinery. Before selecting your seal, consider the environment, temperature, pressure and shaft speed of your machine, as well as the type of medium the seal will come into contact with during operation. These considerations will all determine the size, colour, and type of lip material or sealing element to choose, and whether it can be sealed in or sealed out.
Use the right assembly tools
What are Oil Seals, and How Do They Work?


3. Seal types and numbering system
Polyacrylate Oil Seals - Mostly selected for automotive and transmission uses, polyacrylate seals are able to withstand fuel, oil, ozone, sunlight and weather when used. With cars exposed to all these different fluids and elements, they are the perfect choice. However, they should not be used in low temperatures, as their flexibility weakens when cold.
Posted by on 31st May 2019
Choosing the right oil seal
Proper installation of the 25x47x7 oil seal is essential to ensure its effectiveness. It is important to carefully clean and prepare the surfaces where the seal will be placed, as any dirt or debris can compromise the seal's ability to function properly. Additionally, the seal should be installed with the correct orientation and pressure to create a tight and secure seal.