Shelf life of an o ring

It may seem a surprising topic of conversation, but when it comes to o rings and seals, it's important to note that they do have a shelf life, which, if not monitored and regularly checked, can affect their quality and overall performance.  How and where you store...

Everything You Need to Know About Large O-Rings

Large O-rings, which are often referred to as giant o-rings, are used in a wide variety of applications. They are primarily needed for jobs where heavy machinery or equipment are used, but you’ll find there are a variety of options on the market when choosing large...

How to Avoid Pipeline Flange Corrosion

Our team is all too aware of the risks of corrosion, but it’s something that you can work to avoid in your home and workplace. Preventing corrosion isn’t always an easy task, which is why it’s such a common problem within buildings in the UK. Visit our homepage for...

O-rings suitable for the pharmaceutical industry

O rings are widely used across various industries to support a variety of different pieces of equipment and applications.  They provide an essential function and are ultimately moulded and manufactured to ensure they provide a continually high level of quality through...

The Best Chemical Resistant Gaskets for Sulfuric Acid

If you are using sulfuric acid on a regular basis within your industry, you might be aware of how corrosive it can be. While it can be useful for dyes, explosives, fertilisers, and many more applications, finding a chemical resistant gasket can often be one of the...

Different elastomers for o rings and various applications

An elastomer is a primary raw material used for most o rings. They are typically manufactured as gum rubber or manufactured synthetically, and surprisingly today, there are approximately over 32 different synthetic rubbers now available.  Elastomer compounds will...

Spiral wound gasket thickness – what’s best?

It is often recommended that using a thinner gasket type/material will result in better sealing performance.  Why?  Because thinner gaskets tend to require much less gasket stress to provide applications with the perfect seal, they also have an excellent response to...

Choosing the correct oil seal application

Choosing 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...

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...

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.

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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