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...

What is a Window Seal?

A window seal is something that nearly all of us will have seen in our homes or workplaces and is designed to help make your building more comfortable. Within our range of Sealing Specialist Products, we offer a selection of window seals designed for various...

See our latest catalogue for all the services we offer.

What are Encapsulated O-Rings?

What are Encapsulated O-Rings

When discussing the various o-ring options on offer, you might hear encapsulated o rings being discussed. This type of o-ring offers many advantages to manufacturers, but you’ll want to ensure you understand its proper application before purchasing encapsulated o-rings. Keep reading as we discover everything you need to know about this type of o-ring, which is also commonly referred to as an elastic o-ring.

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What is an Encapsulated O-Ring? 

An encapsulated o ring is slightly different to a typical o-ring, as it’s created with an elastomer stimulating core. It has a seamless shield that is made from Fluorinated Ethylene Propylene or Perfluoroalkoxy, both of which are chemical-resistant materials. They help to prevent corrosive fluids and gasses from getting into the elastomer during any type of application. Although it is often known as an elastic o-ring, it’s important to note that encapsulated o-rings aren’t elastomers. They are made from plastic but still offer the same characteristics as rubber and elastomers. The shield is hard, but the core elastomer provides the memory of the o-ring when it’s placed under pressure. It, therefore, offers unique properties and advantages when compared to typical o-rings, which is why more businesses are opting to use this solution.

What Does an Encapsulated O-Ring Look Like? 

The common profile of an encapsulated o-ring will be a circular cross-section, however, you can request oval, square, or rectangular shapes ones. These will naturally be more expensive, which is why they are less commonly used. A lot of tools and time are needed for this option, so it is a complex solution which only specialists in the field will offer. Encapsulated o-rings can be offered in a variety of thicknesses, and these products are offered tailored to a client’s needs. Most companies will offer a variety of sizes as standard, which are the most popular dimensions based on their experience and clients. This will help you find a solution quickly when needed and offer a more cost-effective solution for every client.

The minimum inner diameter will depend on the thickness of the o-ring. However, there’s no maximum size when it comes to the inner diameter. Some o-rings on offer are slightly compressible, which will help to fit the space they are getting used in. As you can see, they offer many design benefits over typical o-rings, which is why we recommend considering this type of o-ring for certain projects.

The Advantages of Encapsulated O-Rings 

There are many great benefits of investing in encapsulated o rings, including low contamination and low penetrability. The ratio of friction is between just 0.1 and 0.2, which is much lower than other options. They are compliant with many industry regulations, so you’ll have a safe and secure solution to use on a regular basis. Encapsulated o-rings can be used at a wide range of temperatures, and they are resistant to nearly all media. We find they are particularly useful for businesses operating within the chemical processing, food, and pharmaceutical industries. For these businesses, they will be a cost-effective solution that offers high-performance levels for many critical parts of your business.

When to Avoid Using Encapsulated O-Rings 

Of course, there are times in which encapsulated o-rings should be avoided. Firstly, they aren’t suitable for use under high pressure, as they are not designed for this application. Dynamic applications are also best avoided for safety reasons. When you are placing them in contact with abrasive media, you will find that encapsulated o-rings aren’t an effective solution. Finally, if your housing design needs excessive stretch, you’ll want to look for a solution that’s more flexible for your requirements.

Should You Use FEP or PFA? 

When choosing encapsulated o-rings, you’ll then have the choice between FEP and PFA. In general, you’ll find that PFA is best for use at high temperatures, as it is resistant to temperatures over 200°C. It offers all the same benefits as FEP, but it will also offer a longer service life. It has great mechanical and temperature resistance and is less likely to crack under stress or pressure. Of course, we recommend comparing prices as well, as this is often the biggest factor for companies. Delivery time is another consideration, as you may want to opt for the one that we have in stock at the time for any urgent projects.

Encapsulated o-rings offer a wide range of benefits to users, and you’ll find them to be a reliable solution for a wide range of applications. You’ll want to ensure you plan ahead for your projects to ensure you have this item in stock to avoid any issues during the process. Contact our team today to discuss your encapsulated o-ring order. We’ll be happy to answer any questions you have and find the best solutions for your business needs this year. 

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