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Rubber & Metal Oil Seals: Purpose, Advantages & Features
Karthik Auto Sales was born in 1989 as a sole proprietorship in the industry. We are a leading manufacturer, supplier, trader, and wholesaler of Automotive O Ring, Hydraulic Hose Pipe, Hydraulic Seal, Rubber Bellow, and many more. Our product lines are eco-friendly in nature and remarkable in their durability and robustness. Our products are whole areas of exact dimensions and have the ability to resist for a long time. We always have our continuing customer satisfaction and work according to needs and the demand of our customers.
What is Rubber Oil Seal?
Elastic parts called rubber oil seals are utilized to physically close a little space between two mating surfaces or joints. The flange faces of pipes and fittings, the mating surfaces of an automobile’s cylinder head and engine block, tank rims and covers, door edges, frames, and so forth are examples of these surfaces. By flowing through and filling the surface imperfections of stiff parts, rubber oil seals seal surfaces. Compressive pressures applied by the component pieces, which cause the gasket to flex plastically, produce the sealing effect.
How is Rubber Oil Seal made?
Gasket cutting, gasket punching, and rubber molding are just a few of the methods that may be utilized to make a gasket that perfectly suits the intended application and solves a variety of issues.
At Karthik Auto Sale, we use the rubber molding process to make all of our rubber gaskets. Using this technique, the raw rubber compound is poured into a mold, compressed, and heated to a high temperature. Compression molding and injection molding are the two methods for molding rubber.
Rubbers’ elastomeric makeup is what gives them their capacity to seal. Natural and synthetic rubbers are members of the elastomer family of materials. By cross-linking protracted polymer chains into amorphous structures, elastomers—classes of polymers with a highly elastic nature—are produced. Since the intermolecular forces between the polymer chains are not very strong, stress might cause them to rearrange. Elastomeric gaskets may easily conform to the profile of the surfaces thanks to this characteristic, resulting in a tight seal.
What are the Compounds of Rubber Oil Seals?
Buna Oil Seals
The most common elastomer used in sealing is buna (nitrile) oil seals. Hydraulic fluids, water, steam, alcohol, mineral oils, and greases are all very resistant to nitrile oil seals. High tensile strength, abrasion resistance, and low compression set are just a few of the fantastic properties of nitrile.
Viton Oil Seals
Petroleum oils and fuels, mineral oils and greases, solvents, hydraulic fluids, water, and steam can all be used with Viton oil seals because of their excellent temperature and chemical resistance. They have characteristics of a low compression set. In cases involving chemical exposure and for demanding vacuum duty, Viton oil seals are preferred.
Silicone Oil Seals
Silicone oil seals absorb a lot of lubricants, which reduces friction and wear. Mineral and vegetable oils, salty solutions, and a variety of environmental conditions are all resistant to silicone oil seals. Silicone is commonly used in the food and beverage, as well as the medical/pharmaceutical industries.
EPDM Oil Seals
Alcohol, water, greases, and other environmental conditions can be used with EPDM oil seals. Organic and inorganic acids, salt and potassium alkalis, water, steam, and cleaning chemicals are all resistant to EPDM oil seals.
Polyacrylate Oil Seals
Oil seals made of polyacrylate are more heat resistant than nitrile. Oil seals made of polyacrylate are resistant to petroleum-based oils and fuels, transmission fluid, and the elements. In applications requiring high surface speeds, polyacrylate oil seals are preferred.
What is Metal Oil Seal?
Metal cased shaft seals are typically formed of a stamped metal case with an elastomer sealing lip glued to the case. Typically, a stamping press is used to form mild carbon steel into the case. Typically, metal is spun into a seal with a large diameter. The case’s main functions are to protect the lip during installation and to ensure a tight fit between the seal’s outer diameter and the housing bore. It is occasionally necessary to apply a protective coating to stop corrosion when a metal-cased seal is not composed of stainless steel.
When the shaft installation is up against the sealing lip, a strengthened metal casing guards against damage or unintentional spring displacement. For the best sealing, a steel garter spring and an improved seal lip maintain a consistent radial lip force. Although the metal casing is exposed to the air, water, and other substances, adding a sealant coating to it as an optional extra enhances the static sealing and corrosion resistance between the housing and the seal.
What are the Factors in Oil Seal Selection?
Our oil seals are chosen from the following sizes, which are offered in both inch and metric units:
- Type: Combination of lip design and case type.
- Shaft Diameter: The outside diameter of the shaft where the seal will operate (sometimes referred to as the I.D. of the oil seal)
- The interior diameter of the bore housing, which is where the seal will function (sometimes referred to as the O.D. of the oil seal)
- Width: The bore’s depth (also known as the width or height of the seal). Note: When the seal’s width is not precisely defined, the bore’s depth is typically increased to provide for the possibility of replacing the seal with one that is wider.
- Sealing Lip material
- Any unique components or factors, such as the use of stainless steel for the case and/or spring
- Any special treatment or finish such as painted, polished edge, etc.
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