What is an oil seal? 

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Seals are essential to protecting the bearings of any rotating shaft assembly -They prevent contaminants such as dirt, dust and water, while also preserving the system’s lubricant.

Choosing the right oil seal

Oil seals come in many different types and materials depending on their application. Determining the material is vital to ensuring your equipment is operating at its best performance. For example, your equipment may need to run at higher temperature applications, such as an engine seal for a jet engine, you may need to choose a specific material for your oil seals to run properly. In this article, we will explore the most popular and utilized materials in the industry, as well as touch on some of the more unique options out there.

Oil seal materials

Nitrile

The first material that we are going to look at is Nitrile Buna- N 70 or NBR for short. 

NBR is recommended for the majority of standard applications and is the most commonly used rubber (elastomer) material. This is because of Nitrile's compatibility with most environments as well as its relatively low cost. Generally nitrile is used for disposable non-latex gloves, footwear, automotive transmission belts, synthetic leather, hoses, o-rings, gaskets, oil seals, and more. 

The temperature range of nitrile is −35° to 120 °C (−30° to 250 °F). Due to this wide range, NBR seals can be used for gas oil, silicone oil, animal/vegetable oils and fat, hydraulic liquid as well as hot and cold water. In addition, NBR is oil resistant and has an excellent abrasion resistance, so for any application that demands shock absorbers, NBR is a perfect choice to go with. 

Some disadvantages of NBR are poor ozone, sunlight and weather resistance as well as limited high temperature and flame resistance. For higher temperature resistance, a much better material to use is Silicone. 

Silicone 

Silicone compounds or “VMQ” offers a wide range of traditional operating temperatures starting at -60°C to 200°C (-140°F to 392°F). 

In addition to its excellent temperature resistance, it is also resistant to ozone, light, and weather conditions. Silicone can be typically found in the food and medical industry as well as in hydraulics and pneumatics. It is often the preferred material for o-rings, moulded parts and flat seals but is also commonly used for electric insulators due to the material’s translucency and flexibility. 

Although extremely flexible, silicone does have some disadvantages. Many silicone compounds have poor tensile strength, tear resistance, and abrasion resistance. If you are looking for a material that offers a higher tensile strength, while still offering high temperature resistance, look no further than Viton®.

Viton® 

Viton®, a trademarked name of The Chemours Company, is a specific brand of synthetic rubber commonly used in o-rings, oil seals, gaskets, chemical resistant gloves, and other molded products. 

Due to having a higher density, Viton has the widest temperature range of -40°F to over 400°F (-40°C to over 240°C) making it a perfect choice for higher temperature applications. Viton® also has the largest range of chemical resistance, i.e., it is resistant to silicone oil and grease, mineral/vegetable oil and grease, aliphatic, aromatic, and chlorinated hydrocarbons, non-flammable hydraulic fuels as well methanol fuels, and more.

Although it does have a higher tensile strength and longer wear times than other materials, it is recommended to be used in dry-running applications sparingly or intermittently. 

While Viton offers a superior temperature and chemical range than other materials, it can be more expensive than the others as well. Let’s take a look at an alternative that is easier on the wallet, Polyacrylate. 

Polyacrylate is a great compromise between cost and quality. It has a high performing temperature and chemical range, but not to the extent of the range of Viton. The temperature ranges from 31°C to 148°C (-25°F to 300°F). Polyacrylate is primarily used in automotive transmissions and hoses but also found in shaft seals, gaskets and o-rings, due to offering a high resistance to hot oil and oxidation. While Polyacrylate is a great alternative to other high temperature resistant materials that are more expensive, it does have a poor water compatibility and cold flexibility. The best situation for Polyacrylate is an environment where heat and oil resistance but cost is the major issue. And while these 4 different materials cover a wide range of applications, there are even more materials out there designed for very specific niches in mind.

Summary

If you are looking for the highest temperature resistant oil seals, Perfluoelastomer can go up to 600°F. If you are more concerned for low temperature, Chloroprene can go all the way down to 40°F, which is why it is used most commonly for refrigeration. And if FDA applications or medical devices are your primary concern, Butyl , the all petroleum compound, will be your best choice. As you can see, when choosing the right material to work with, you must analyze several other key components to help choose the right one. 

Hopefully after reading this article, you have a better understanding of why choosing the right materials for oil seals is so important. Remember, if you have any questions about industrial oil seals and supplies, please contact us and we would be more than happy to help.

Advantage & Disadvantages of mechanical seals

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In the process business, the constancy of turning equipment is of the most outrageous importance, which relies upon the limit generally to avoid spillage through shafts. These mechanical seals help in staying away from spillages. It is important that clients/managers fittingly keep up the mechanical seals. Along these lines, it is essential that a serious utilitarian cognizance, and foundation of requirements and frustrations of mechanical seals.
A mechanical seal is a specific part that seals a cutting-edge machine together, especially while the partner turns behind fixed parts.

These imperative little contraptions are essential in ensuring that there is no spillage between the outer condition and within a mechanical blender. Mechanical seals come in two essential sorts: single mechanical seal and two-fold mechanical seal. Looking for mechanical seals manufacturers in Mumbai Flowmake Seals is one of the leading mechanical seal manufacturers in Mumbai and a supplier company in Mumbai

ESSENTIAL FUNCTIONS OF MECHANICAL SEALS
The significant capability of a mechanical seal is to seal the initial where the post enters the siphon, staying away from fluid spillage. Initially, mechanical seals were made to overcome the adverse issues collaborated with squeezed stuffing boxes. Direct mechanical seals offered the other choice to fluid spillage; none, least not recognizable with the reasonable eye. Mechanical seals can manage fundamentally higher temperatures and loads than at some other time and can meet zero versatility improper release benchmarks.

MAIN ADVANTAGES/DISADVANTAGES OF MECHANICAL SEALS
A part of the good position and insult of mechanical seals over standard packings and lip seals are recorded under.

MAIN ADVANTAGE
1. It handles many fluids including acids, salts, and unpleasant particles.
2. Long working life.
3. Mechanical seal handle insignificantly skewed/non-concentric
4. The activity doesn’t achieve shaft wear.
5. Shaft condition isn’t fundamental
6. Handle Bi-directional shaft unrest, gigantic weight, temperature, and speed trips.
7. A positive fixing for food getting ready, risky synthetic substances, and radioactive fluids.

DISADVANTAGE
• It requires more space than extended lip seals.
• Mechanical Seals can’t typically manage critical end play.
• Fixing faces should be done smoothly (0.08 to 0.4 micrometer) and can get actually hurt.
• High starting cost.
Single mechanical seal

Advantage
Practically 90% of single mechanical seals are introduced on an ordinary premise. Generally in single mechanical seals, the siphoned fluid should be cool, not eccentric, have extraordinary lubricity, and not contain harsh or separated solids. The single seal is the safest fixing device among mechanical seals as it has the most un-number of parts. Help by, an enormous siphoning fluid is used for seal oil. In the event that the siphoned fluid isn’t classy as a fixing fluid.

Limitations
The hindrances with single mechanical seals are that assuming seal spills there is no drop-down open. Moreover, system upset hurt the gleaming of liquid and bursting reasons for appearances.
Twofold Mechanical Seal
Disadvantage
A couple of fluids are flawed with a twofold mechanical seal siphon. Routinely these liquids convey harsh material in suspension that would rapidly wear the seal faces, or the liquid may be horrendous and risky. There are two responses to this issue. One is the utilization of normal controls, and the other is the usage of various seals or twofold mechanical seals.

There are many types of mechanical seals like

teflon bellow mechanical seal

balanced mechanical seal

rubber bellow mechanical seal

Flowmake Seals are a manufacturer & supplier in Mumbai, India check out today!

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