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Medical Grade Seals

When looking at your options for gaskets and seals, you’ll see that some products are marked as medical grade. These seals offer a range of extra benefits and features when compared to your typical seals, and they are required for many different types of processes....

O Ring Face Seals

While you may be familiar with O-rings, these come in various types, which offer benefits to a range of manufacturing applications. Sometimes called a toric joint, O-rings work to seal the area between two different joined parts. This means that even when working at...

Straight Thread Tube Fitting O-Rings

When looking at the types of O-rings on offer for your manufacturing processes, you might be wondering which would be the best solution for your unique needs. Today we’re going to take a deeper look into what straight thread tube fitting O-rings are and how we can...

Can You Use Corrugated Gaskets Instead of Spiral Wound Gaskets?

If you’ve always relied on spiral wound gaskets in the past, you might be wondering if there is an alternative option on offer. Corrugated gaskets offer many benefits over spiral wound gaskets, which is why so many companies are opting to switch between these two...

What is a Wiper Seal?

An important component that’s often overlooked by businesses and manufacturers is the wiper seal. If you are wondering what a wiper seal is, today we’re going to discover why you need to use them and how they can support your work. Go to the homepage for more...

How to Choose the Right Seal for Electric Motors

When choosing a seal for your electric motors, there are many options on the market. Finding the right electric motor shaft seal is critical to ensure your customers are happy and that your vehicles fit their needs. Keep reading to discover how to choose the right...

Why Should You Invest in Quality Seals?

While industrial seals might seem like something you could save a little money on, this is one part that we don’t recommend cutting costs on. A quality seal will offer many benefits to your business and operations, so it’s worth taking the time to find a solution...

All you need to know about Neoprene O rings

Popular in the refrigeration industry, neoprene o rings are also growing in popularity across a wide range of other sectors due to their incredible resistance to hazardous materials. Also known as chloroquine o rings, these o rings provide excellent resistance to...

Why all sealants are not the same

It's important to understand just how critical it is to use the correct type of sealant. It's especially the case when working with heavy machinery or any industrial situation. You don't want to have to worry about whether your sealing products are working correctly...

How to understand O-rings and their design

O-Rings are a critical component for the proper sealing of specific pipes. They have to sit within a specified groove, which can vary based on the hardware used. That's why it's important to note the various types of o-ring groove design to understand better what kind...

Optimum squeezing force for an o ring

Optimum squeezing force for an o ringIt 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 reliant on the squeeze force applied, as a tight seal is what helps liquids and gases from escaping from the application. 

At specialistsealingproduct.co.uk, we stock a range of different gaskets, seals, and o rings to suit various applications in various industries. 

However, when it comes to squeezing and how much force you should apply, this is of course dependent on the mating surfaces and o ring material itself. In this post, we look at squeeze force further, factors affecting squeeze percentage, and why more squeeze is not always better. 

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Squeezing force applied to o rings 

Finding the optimum level of a squeeze for your o ring and application will come down to a series of tests and, in some instances, trial and error. 

Yes, the more squeeze that you apply, often the better and stronger the seal will become, and the longer it can maintain the force applied. In these instances, the ability of an elastomer to maintain its compression set is vital as, ultimately, it dictates the ability of the elastomer to maintain its push back. 

If we examine this a little further. If the elastomer has an o ring compression set of over 80%, it is unlikely that it will return to its original uncompressed state when it is not squeezed. Hence causing damage and allowing leaks to appear. 

Other influencing factors affecting o ring squeeze include: 

Damage upon installation – the installation of an o ring can be a delicate process. In some cases, during the installation process, the tighter the squeezing force you apply, the more likely you are to pinch the o ring, creating an opening for leaks. 

O ring material – o ring material choice is vital because specific elastomers and compounds will only stretch so far before they crack or rupture because they have been squeezed past their optimum percentage levels. It’s also important to note that rubber seals do not compress volumetrically, so you must avoid over-compression if this is your o ring material of choice. 

Gland volume to o ring volume must be measured – this area focuses on not overpacking the gland. During the installation process, you need to make sure that there is enough groove volume to accept the o ring.  Allowing the o ring to fit into the groove and expand as required. Too much o ring volume and not enough groove volume will overpack the gland causing damage and seal failure.  Ideally, the o ring must fit snugly into the gland, and the o ring volume should never exceed 90% of the minimum gland void as this will cause premature failure of the seal. 

Achieving the perfect o ring compression and function is vital. In some cases, engineers work on testing the leak path ratio between the o ring and its mating surfaces to avoid potentially premature failure. 

Sometimes it does not matter how much squeeze you apply to o ring seals. Factors such as gas permeation, the seal’s interaction with certain chemicals, mechanical damage, thermal degradation, etc., will all cause the o ring seal to perform poorly, no matter what. 

This is why testing optimum squeeze levels and choosing the right materials and compounds can be vital. Every application is different; hence every o ring compression set will be different. 

Finding out the right percentage level for your seal and mating surfaces before mass-scale production takes place, is, therefore, essential. 

There are numerous factors when considering the squeezing force of an o ring. Specialist o ring suppliers in the UK, like the team at Specialist Sealing Products, will be able to provide you with further sealant advice and information, as well as refer you to manufacturing instructions if applicable. 

If you are looking for the perfect o ring seal, look no further than SSP for all your gasket and sealing requirements. 

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Reference video: tarkka

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