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Types of Flanges

Businesses in a variety of industries rely on flanges to join pipes or components together or to keep equipment secured to a surface. When it comes to choosing the best types of flange for your processes, you’ll want to take the time to research the different options...

Threaded Flange

Threaded flanges are probably the most recognisable of all flanges due to their screw thread design that is used to connect it to the pipe. Threaded flanges, also known as screwed flanges (for obvious reasons), require a male and female thread to create a connection...

Slip On Flange

A slip-on flange can also be known as a hubbed flange, which, as the name suggests, has a hub with a very low profile. Why is this important? Because this type of ring type joint gasket has an internal diameter larger than the connecting pipe, allowing you to slide it...

Weld Neck Flange

Also known as tapered hub flanges or high hub flanges, weld neck flanges are a specific type of gasket with a protruding ridge and long neck used to connect pipework and provide you with a high-quality seal. Weld neck flanges, in particular, are a popular choice when...

Nitrile vs Viton® – What is the Difference?

As you start to make a decision about what type of O-rings to purchase for your business, you might wonder what material is the most suitable for your unique needs. Every business operation has different requirements for their O-rings, such as the temperature,...

Aflas vs Viton

When it comes to choosing O ring suppliers in the UK, you’ll find that there are a wide range of materials on offer for you to choose from. Many people find that the options can seem quite overwhelming, with some materials having similar properties but offering...

EPDM Gasket

Both the automotive and construction industries have started to use EPDM gaskets more frequently in recent times. This rubber material is UV light resistant and has many fantastic properties that make this part highly effective for a wide range of processes. Keep...

Metal Gaskets

When comparing gaskets for use within your business processes, you’ll find that these can be made from a variety of materials. Metal gaskets are a very popular option, offering many advantages over other materials. When looking at sealing product options, make sure...

AFLAS o ring

O rings come in many different dimensions, thicknesses, and materials. And it is the various different materials that o rings can be manufactured from that make each o ring unique and suitable for specific applications. In fact, there are hundreds of different types...

O Ring Vulcanization Process

With years of o ring knowledge and experience in o ring vulcanization, we're one of the leading experts in providing the right sealing solution for you. To view our full range, visit our O-ring product page, with a wide selection and something to match every...

See our latest catalogue for all the services we offer.

O Ring Materials Selection

O Ring Materials SelectionThis is a quick overview of the various O-Ring materials that are available for applications and found at select UK O-Ring suppliers. When it comes to Specialist Sealing Products, it is a good idea to be clued into every option that is on the market. The materials can range from the common O-Ring with Shore 70A hardness to more complex elastomeric items.

This list will give any engineer a brief understanding of how to make the correct O-Ring selection for their application.

O-Ring Requirements

Some of the factors to take into consideration when choosing the right O-Ring are:

  • Temperatures to which the application will be subjected
  • Pressure, the seals, will encounter
  • If the application chemicals will be compatible with the O-Ring material
  • What size and budget restraints are required
  • Durometer readings

Once the engineer knows these key points, it will be possible to determine the correct O-Ring material that is suitable. If there is any doubt that the standard materials aren’t acceptable for an application that demands extreme performance or environment, a customised specialist material can be designed.

Common O-Ring Materials

All O-rings are manufactured from an elastomeric material. However, they have many different formulaic compositions that change the function specifications.

The more common O-Ring materials are:

  • Nitrile, or NBR
  • Viton®, or FKM
  • Silicone
  • Neoprene
  • EPDM

Nitrile/NBR/Perbunan: If there is one substance O-Rings must be able to tolerate, it is lubricants. Nitrile was developed for sealing systems that encounter large quantities of oils and fuels. This is the O-Ring material of choice for gasket manufacturers. Even though it has been around since the 1930s, it remains a fundamental, popular choice.

Viton®/FKM/Fluoroelastomer: A synthetic rubber developed for high performance, Viton® is the O-ring of choice for any application that demands a high tolerance to chemicals and fuels. Harsh corrosive chemicals can erode or damage an O-ring after a continued interaction. FKM performs well under high temperatures, making it a good choice for combustibles like gas. Strict tests have indicated that Viton® is not suitable for any applications using steam.

Silicone: This ubiquitous synthetic rubber remains durable in most temperature extremes. Unique compounds have been added to the silicone O-Ring gum stock to make it more tear-resistant. It comes in a variety of colours and can withstand fluctuations in weather.

Neoprene®/Chloroprene: Neoprene® has been around for many decades because it is well-priced and has overall solid performance. Some of the outstanding qualities of Neoprene® is its ability to be customised for certain specifications. In its commercial uses, it is fuel and lubricant resistant, durable in all weathers and performs well in dynamic applications.

EPDM: This material is made of synthetic rubber that is resistant to long periods of exposure to weather and harsh conditions. This gives EPDM a solid rating when added to its excellent performance against fuels, oils and lubricants.

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