In addition to the materials used in their construction, vessels and tanks must also be designed with features that ensure the safety and efficiency of their operation
- The primary function of a radial oil seal is to create a tight seal between the rotating shaft and the stationary housing of the machine. This seal is achieved through the use of a flexible rubber or elastomer lip that is pressed against the shaft as it rotates. The lip creates a barrier that prevents oil from escaping, while also allowing the shaft to rotate smoothly without any friction or wear.
In engine applications, square rubber gaskets are used to seal various components such as valve covers, oil pans, and intake manifolds. These gaskets help prevent oil and fuel leaks, ensuring the engine operates smoothly and efficiently.
square rubber gasket

The skeleton oil seal is a typical representative of the oil seal. Generally speaking, the oil seal refers to the skeleton oil seal. The function of the oil seal is generally to isolate the parts that need to be lubricated in the transmission parts from the output parts, so as not to allow the leakage of lubricating oil. The skeleton is like the steel bars in the concrete member, which acts as a reinforcement and enables the oil seal to maintain its shape and tension.
Among the most common causes of oil seal failure are:
Shaft and Bore Tolerance
VMQ, also known as silicone, is also used for oil seals, but this is less common because the mechanical strength of VMQ is low and this material has poor wear-resistance This makes it less suitable for dynamic applications, but it can withstand fairly low and high temperatures from -60 °C to 200 °C. Many types of VMQ are also suitable for contact with pharmaceutical and food products, so VMQ is an option worth considering. VMQ oil seals are usually available on request.
In these instances, Viton can be the perfect sealing material for methanol/ethanol-blended gasoline.
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Viton Oil Seals - A synthetic rubber and fluoropolymer elastomer, Viton is used to make oil seals that provide resistance in both high temperature, up to 250°C and low compression set components. They also offer a high resistance to chemicals and abrasions, so they can be used in elements that regularly interact with petroleum and solvents.
Never use a used seal in another project as it may develop defects such as cracks or bubbles in the seal lip previously used.
Construction of an Oil Seal
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The last step involves the actual pressing-in of the seal. There are tools and tool kits available that can help with seal installation. Their biggest benefit is that they apply a very uniform force to the seal case, eliminating the possibility of the seal seating in any way other than flush.
Nominal seal width
b, mm


Oil seals operate by creating a tight barrier between two moving or stationary parts, such as a shaft and housing, to prevent oil from escaping and contaminants from entering the system. This is essential for maintaining the efficiency and performance of the machinery, as well as preventing potential safety hazards.
Double Lip Oil Seals
(ASTM*1 code)