Oil seals, also known as rotary shaft seals, are critical components in machinery and equipment, used to prevent the leakage of lubricants and block contaminants from entering mechanical systems. Selecting the right oil seal is essential for maintaining the efficiency and longevity of your machinery. This guide will provide an overview of oil seals, their types, materials, and key considerations to help you choose the right oil seal for your application.
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Oil seals are mechanical devices designed to close the spaces between stationary and moving components in mechanical equipment. They prevent lubricants from leaking out and contaminants such as dirt, dust, and moisture from entering the system.
Sealing Element: Typically made of elastomeric material, this part makes direct contact with the shaft to provide the sealing function.
Metal Case: Provides structural stability and maintains the shape of the seal.
Garter Spring: Ensures that the sealing lip maintains consistent contact with the shaft, enhancing the seal's effectiveness.
Rubber Skeleton Oil Seal
Application: General-purpose sealing where the primary function is to retain lubricant and exclude contaminants.
Advantages: Simple design, cost-effective, and easy to install.
Application: Environments where additional protection from contaminants is required.
Advantages: Extra sealing lip provides additional defense against dirt and debris.
Application: High-pressure and heavy-duty applications.
Advantages: Two garter springs provide enhanced sealing force, making them suitable for more demanding conditions.
Application: Harsh chemical environments, high temperatures, and high-speed applications.
Advantages: Exceptional chemical resistance, low friction, and high-temperature tolerance.
TC TG SC NBR FKM Oil Seal
Characteristics: Good resistance to oils, fuels, and other chemicals. Suitable for temperatures between -40°C to +120°C.
Applications: Automotive, general industrial use.
Characteristics: Excellent high-temperature resistance up to +200°C and superior chemical resistance.
Applications: Aerospace, chemical processing, high-temperature applications.
Characteristics: High-temperature resistance, good flexibility at low temperatures.
Applications: Food and beverage industry, extreme temperature conditions.
Characteristics: High wear resistance, excellent mechanical properties.
Applications: Hydraulic systems, applications with high abrasion.
Characteristics: Outstanding chemical resistance, low friction, high-temperature tolerance.
Applications: Aggressive chemical environments, high-speed applications.
Temperature Range: Select a material that can withstand the operating temperatures of your application.
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Chemical Exposure: Ensure the seal material is compatible with any chemicals it will be exposed to.
Inner Diameter: Match the inner diameter of the seal with the shaft diameter.
Outer Diameter: Ensure the outer diameter fits snugly into the bore.
High-Speed Applications: Consider seals with low friction and high heat resistance, such as PTFE seals.
High-Pressure Systems: Choose seals designed to handle higher pressures, like dual spring seals or PTFE seals.
Lubricant Type: Ensure the seal material is compatible with the lubricants used in your system.
Tools: Use appropriate tools to avoid damaging the seal during installation.
Guidelines: Follow manufacturer guidelines for best results.
Monitoring: Periodically check for signs of wear, leakage, or damage.
Replacement: Replace seals as necessary to prevent machinery breakdowns.
Sealing Lip: Properly lubricate the sealing lip during installation and operation to reduce wear and improve performance.
Environment: Maintain a clean environment during installation and operation to prevent contaminants from damaging the seal.
If you deal with rotatory shaft equipment, you would probably be having rubber seals in your mechanical assembly. For any manufacturing company, optimal functionality, efficiency, and long service life are essential to your success in the market. A component that is majorly underappreciated within a machine assembly, would be oil seal.
Shaft seals are used to prevent lubricant leaks like oil or grease and protect machinery from dirt, dust, and water—which makes them invaluable to industrial operations. In this post, we will dive deeper into oil seals and discuss everything that one must know, such as what it is, how it works, types, applications, and what to keep in mind when buying oil seals.
Rubber oil seals are placed between moving and static parts of mechanical equipment to prevent damage caused by moisture, contaminants, etc. Also known as rotatory shaft seals, grease seals, fluid seals, lip seals, and dirt seals; oil seals play an important role in closing the gaps between moving and stationary parts of machines.
Their main purpose is to retain or separate fluids from mixing and escaping the gauge, as well as stop moisture, abrasives, corrosive materials, and foreign contaminants from entering the parts, thereby ensuring maximum machine efficiency. Moreover, shaft rubber seals help prevent lubricant leakage at high pressure, for instance, when the machine is working at an extremely high pace.
Oil seals work by retaining lubricant in a thin layer between the lip and the shaft. These seals are attached to the bearing, with their lip pressing against the rotating shaft and the casing resting against the housing to hold the seal in place.
Oil seals perform some functions that ensure functionality at all costs and they do this by retaining lubricants at all costs and not making them escape no matter how high the pressure is. Whenever an oil seal fails, it creates seal leakage allowing abrasives, corrosive moistures and sediments to enter machines. Oil seals are especially used in equipment that has rotating, oscillating, and reciprocating shafts – pumps, pistons, etc.
Different types of seals offered by rubber products manufacturers in India include – Single and double lip oil seals, metal cased, external and internal oriented oil seals, and spring-energized oil seals and you can pick the one that best suits your industry requirements.
Practically, all machine equipment including assembled machines, car engines, and PTFE machined parts use these oil seals to prevent harmful interactions that could possibly result in damaged parts. They are used in the assembly of Elevators, conveyor belts, engines, grinding mills, pipelines, wind turbines, and more.
When equipment is under high pressure, lubricants tend to escape, and dry parts clash. Oil seals help prevent this by sealing holes where lubricants can leak out. rubber seals are designed to offer optimum sealing performance and extreme durability even under high-peripheral speed. They are lightweight, compact, and exhibit high self-lubricating properties. Oil seals are manufactured with high-grade materials and last long without showing any signs of hardening, softening, or aging.
Moreover, oil seals are widely used throughout the aerospace industry in both space exploration and aviation applications. Sujan Industries manufactures all aircraft rubber items including O-rings, Gaskets, Seals, Pistons, Grommets, Washers, and Protective Boots & Bellows. In the aviation sector, pneumatics and hydraulics are used to operate components like landing gear and wing flaps. Rubber gaskets are needed in these systems to keep dust and air out while ensuring aircraft components run effectively.
Picking the right type of oil seals is crucial for the proper functioning of machines because in some situations not all types can fit to work on certain machines.
There are quite a few factors to put into consideration when you’re choosing the right oil seal for your machine. Some of these factors include – dimensions, pressure, temperature, type of fluid, lubricant, shaft speed, shaft and bore tolerance, and more.
The capacity of oil seals to handle different intensities of pressure varies with their composition and application, so it is important to understand the compression set of your equipment. Just like the pressure, the temperature that your oil seal will be operating in must be known to be able to choose one that can withstand the working temperature.
Likewise, different types of fluids like grease, water, oil, fuels, etc. will come into contact with oil seals. So, knowing what type of fluids will be in constant contact with oil seals will help you choose the one capable of withstanding the surrounding conditions. When we talk about lubricants, seals always perform well when lubricated, however, in some machines there are dry spells. If you are a supplier of aftermarket parts in India or a user looking for oil seals in the aerospace industry, your search might end with Sujan Industries.
For more information, please visit Oil Seal Kit.