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Nitrile rubber, NBR, and Buna-N – how well do you know your o ring materials?

A widely used elastomer, Nitrile, Buna-N, or NBR rubber, are all oil and fuel resistant and provide a great level of strength, making them a popular material for seals across various industries.  Suitable for a range of applications, this versatile rubber material,...

Optimum squeezing force for an o ring

It is true that the more squeeze you place on an o ring, the tighter the seal it will provide. In essence, the more squeeze (compression) you apply, the greater the force between the o ring and its mating hardware.  And ensuring you have the perfect seal is all...

O Ring Squeeze

The squeeze and shrinkage on an o ring are vital to understanding as these factors stand in the way of your application either experiencing a perfect seal or your application suffering from leaks.  You can measure the shrinkage of an o ring during...

Keeping your o rings bonded

EMI o rings. Those seal ring gaskets are made of silicone compounds, combining environmental sealing with electromagnetic interference protection.  Consisting of metal or metal-coated particles, silicone o rings are filled with silver, silver aluminium, or nickel...

The importance of mechanical seals when reducing water consumption in mining

Environmental considerations are at the top of most industry's agendas in the 21st century as companies evaluate and improve operations, processes, and systems.  Conserving water in mining is one such area that is now being investigated further with the rotation of...

How choosing the correct gasket reduces risks

Health and Safety across any industry are vital, especially so in industrial facilities and settings.  Why?  Because harmful leaks and emissions must be avoided at all costs to avoid serious accidents or injury to your teams and property.  That’s why having the right...

How to tighten your bolts perfectly

How to tighten your bolts and which tools you should use to achieve the perfect seal is not as seamless and straightforward as we would like. Various factors come into play in these situations, such as bolt grade, size, and even application type.  Tightening torques...

Static and Dynamic o rings

A range of factors and application dynamics come into play when choosing a particular type of o ring.  You need to understand the type of seal exert you require, the dimensions, and even compounds.  Due to the nature of an o ring and its overall design, o rings use...

Gasket Sealants

Fortunately, no one gasket suits a range of applications, but rather we have a multitude of gasket sealants available to meet various specifications and requirements.  Ultimately, sealants are used to effectively ensure gasket seals.  Helping to extend a gasket's life...

Types of industrial gasket material

Different industry sectors will use different types of gaskets and different types of gasket materials.   And of course!  Different industrial gasket materials will be much better suited to some industrial processes and applications compared to others.  As different...

Choosing the correct oil seal application

Choosing the correct oil seal applicationChoosing and using the proper sealing devices within oil and gas applications can be vital when preventing dirt, dust, water, and other debris from potentially getting inside and contaminating products. 

Of course, all rubber materials and seals will provide a range of benefits; however, you will need to consider chemical compatibility, sufficient temperature ranges, pressure ranges, and more. 

At specialistsealingproducts.co.uk, we have a range of o rings and gaskets available to suit various applications across a multitude of sectors.  We work with clients to understand all needs and requirements, providing further information where required. 

Below, you will find a range of o ring materials outlining the properties and benefits so you can make an informed decision for your application.

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Oil seals applications 

Oil seals can also be known as rotary shafts seals, shaft seals, lip seals, elastomeric seals, and more. 

Ultimately, oil seals are devices that help to exclude dust and dirt, etc., while at all times retaining the lubricant in the piece of equipment. 

Oil seal materials 

Nitrile (also known as Buna N) 

The most common and economical material within the sealing industry, Nitrile, is used in many oil applications, the automotive sector for aircraft fuel applications, military and marine applications, and more. 

The main benefits of Nitrile when opting for use as an oil seal includes: 

  • It is petroleum-based oil and fuel resistant 
  • Resistant to silicone greases, water, and hydraulic fluid 
  • It offers a low compression set 
  • Has a high tensile strength 
  • Abrasion-resistant 
  • Can sustain temperature ranges from -40 degrees Fahrenheit to 257 degrees Fahrenheit. 

Viton (Fluorocarbon) 

A synthetic rubber used in gaskets, o rings, lip seals, and other moulded devices, Viton offers sealing properties for a range of oil-based applications.  Viton with high fluorine grades will also produce excellent resistance to swell, especially in oxygenated fuel and high-octane blends. 

In these instances, Viton can be the perfect sealing material for methanol/ethanol-blended gasoline. 

The benefits of Viton include: 

  • Can sustain a temperature range from -13 degrees Fahrenheit to 446 degrees Fahrenheit 
  • It is resistant to high temperatures 
  • Resistant to various chemicals such as transmission fluid, petroleum oils, and gasoline 
  • It can be modified for applications with large chemical exposure and hard vacuums. 

Silicone 

Out of all of the elastomers, silicone offers you the widest range of working temperature ranges.  Renowned for its flexibility and low compression set capabilities, silicone is the optimal choice for o rings and other moulded seals. 

The benefits of silicone include: 

  • It offers a temperature range from -85 degrees Fahrenheit to 400 degrees Fahrenheit 
  • It is ozone, weather, and sun resistant 
  • Phenyl based silicones can perform to -148 degrees Fahrenheit 
  • It is completely flexible (making it great for electrical insulation). 

Fluorosilicone 

An oil seal type that is resistant to oils, fuels, and solvents, fluorosilicone also offers temperature stability.  Primarily found in aerospace fuel applications and automotive fuel emission control, this o ring material is fast becoming popular in more and more oil-based applications across a wide spectrum of industries. 

Benefits include: 

  • A temperature range from 75 degrees Fahrenheit to 400 degrees Fahrenheit 
  • It is resistant to high temperatures 
  • It has good compression set properties 
  • It can withstand exposure to ozone, air, and sun 
  • It is chlorinated and aromatic hydrocarbon resistant. 

Atlas 

Aflas is created from fluoroelastomers (FKM), providing the following benefits: 

  • Temperature range from -10 degrees Celsius to 205 degrees Celsius 
  • Resistant to steam, petroleum oils, amine corrosion inhibitors, and hydrogen sulphide. 

Carboxylate Nitrile 

These oil seals are created from a low-temperature tolerant compound.  Benefits include: 

  • Temperature range from -55 degrees Celsius to 135 degrees Celsius 
  • Resistant to abrasion, water, and petroleum oils 
  • Low temperature tolerant. 

Propylene (fluorinated ethylene) 

This tough, chemically inert polymer has a wide working scope as well as: 

  • A temperature range of -55 degrees Celsius to 205 degrees Celsius 
  • Resistant to the majority of chemicals 
  • Ideal for static and slow intermittent dynamic applications. 

Hydrogenated Nitrile/Highly saturated Nitrile 

This is often the material of choice for the oil industry due to the extensive temperature range the material can sustain.  Benefits include: 

  • Temperature range from -30 degrees Celsius to 170 degrees Celsius 
  • Petroleum oil and sour gas resistant 
  • Resistant to H25 and CO2. 

Polyacrylate 

Offering a much more superior temperature resistance, polyacrylate seals are perfect for applications such as high surface speed oil.  Benefits include: 

  • Temperature range from -20 degrees Celsius to 150 degrees Celsius 
  • Resistant to petroleum oils and Freon. 

Polyurethane 

Typically used in hydraulic high-stress applications where compounds under high pressure are exposed to wear, the benefits of polyurethane seals include: 

  • Temperature range between -15 degrees Celsius to 185 degrees Celsius 
  • Abrasion-resistant 
  • Offers a high degree of strength 
  • Petroleum oils and hydraulic oil resistance. 

Perfluoroelastomer FFKM 

An elastomer that has the broadest resistance to chemicals, elasticity, and a roust sealing strength, FFKM benefits also include: 

  • Temperature range of -50 degrees Celsius to 327 degrees Celsius 
  • Resistant to the vast majority of chemicals. 

To find the right o ring and gasket for your oil-based application, look no further than the o ring suppliers, Specialist Sealing Products.  On hand to provide you with the best information, call a member of our team today on 01535 274 776. 

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