What is an oil seal?
Oil seals are the key parts of mechanical equipment used in hydraulic systems, pumps, pistons, pipe connections etc. These are used to prevent the leakage of any lubricant and close the spaces between the moving and stationary components. These products are also known as shaft seals, fluid seals, grease seals, dirt seals, or rotary seals. These seals can stop any harmful contaminants from entering the machine in demanding environments. They also help to prevent the intermixture of two different mediums such as lubricating oil & water.
What are the general purposes of using oil seals?
An oil seal is designed to offer optimum sealing performance. Some of the major functions of oil seals are as below.
- To stop the lubricating oil from oozing outside even at a very high pressure of the oil.
- To protect every type of close-fitting, precision-constructed, sleeve and roller bearings.
- To act as a barrier that keeps the lubricating oil in the right place.
- To stop the contamination, dirt, and other external objects from getting into the system that contains the lubricating oil.
Construction of Oil Seals
Although there are various types of oil seals based on the application’s requirement, they all are made of three primary elements like rubber sealing element, metal case/reinforcement and garter spring. There are many materials used for oil or shaft seals that vary in resilience to the specific condition. These materials have properties that make them perfectly suitable for the required application. Metal cases/reinforcements of the seals are made of carbon steel or stainless steel based on the application which provides strength and rigidity to the seal. The metal surfaces exposed to the environment are treated to protect them from corrosion during normal handling and storage. The purpose of the garter spring which is located on the lip of the oil seal is to support the lip and prevent the leakage of lubricant and other contaminants from entering.
Oil or shaft seals are made from several materials based on the requirement of the application. However, the material selection is one of the important parameters considering several factors like operating temperature, environment, pressure, and maximum shaft surface speed, among others. The most commonly used materials in oil seals are Nitrile, Viton, Silicone, and Teflon which exhibit the below characteristics resulting in better life and performance of the seal.
- Thermal resistance
- Chemical resistance
- Resistance to swelling
- Weather resistance
- Abrasion resistance
What are the applications of the oil seal?
The oil or grease seals are used in a wide range of applications in automotive, construction, agriculture, oil and gas industries, material handling, mining and so on. They are used in:
- Grinding Mills
- Wind Turbines
Looking for the best Oil Seals manufacturers in India?
Sujan Industries is the leading manufacturer, supplier and exporter of rubber products, rubber to metal bonded components, plastic and stainless steel casting products catering to various industries like Automotive, Railways, Aerospace, Defense, Power, electrical, Off-highway etc. We have our in-house manufacturing workshop and latest testing facilities where our experienced engineers and technicians are always on the lookout to produce the best quality parts as per the requirements of our clients. We offer various types of oil seals and other products based on our years of experience in various applications and sectors. So if you are looking to get the top quality oil or rotary seals, get in touch with us.