In conclusion, high-pressure oil seals are indispensable components for the effective operation of various machines across multiple industries. They help maintain seal integrity, prevent leaks, and ensure machinery operates efficiently under pressure. Understanding their importance and functionality can aid in the selection and maintenance of these critical components, ultimately leading to prolonged equipment life and enhanced operational performance.

A rotary shaft seal, also known as a lip seal or radial seal, is a device that creates a barrier between two environments the area where the rotating shaft operates and the external atmosphere. In high-pressure applications, these seals are engineered to withstand significant operational pressures, often exceeding several thousand psi. They are utilized in applications such as hydraulic pumps, turbines, and engines, where preventing fluid loss is critical.

Types of Rotary Shaft Seals

No single physical property of rubbers is responsible for the successful performance of an oil seal or ‘O’ ring. The ultimate tensile strength, breaking elongation, modulus, shore hardness, creep and stress relaxation in tension and compression loads are all important physical properties that characterize a seal or ‘O’ ring. Compression strength and set together with stress relaxation or decay are important for effective sealing. The difference in these properties in a swollen seal is highly critical. An optimum swelling value in a fluid medium is a desirable feature. De-swelling decreases the seal pressure against the wall of the housing where the seal is fixed, leading to leakage. Over swelling minimizes the physical properties of the rubber. Seals made of polysulfide rubbers have extreme fuel resistance but undesirably high compression set. The effect of temperature on the seal is an important factor. Swelling under stress can increase at higher temperatures and a suitable compounding technique should be adopted to reduce this effect.

ERIKS type M (type B according to the DIN standard) has a single metal casing and rubber sealing lip. Since the casing is made of metal, it must be fitted in a well-finished, undamaged groove. Large volumes of oil seals with metal casings are often cheaper, which is why they are often used as original equipment in machines. However, if an oil seal has to be replaced, types with a rubber exterior (type R or RST) are easier to fit. Type MST is similar to M and commonly used. The difference is the dust lip in the MST oil seal that prevents dust and dirt reaching the sealing lip, and extends its service life in dusty environments.

Plug tube gasket

What are Oil Seals - Guide to what an Oil Seal is used for

Overall, floating oil seals play a crucial role in maintaining the integrity and performance of machinery that relies on fluid containment. Their innovative design, durability, and versatility make them an indispensable component in a wide range of industries. By investing in high-quality floating oil seals and following best practices for installation and maintenance, businesses can enjoy peace of mind knowing that their equipment is well-protected from oil leaks and other potential issues.