NEW

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...

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...

Optimal Squeeze for an O Ring to be effective

O ring optimal squeezedoughnut-shaped seal that is primarily used to stop liquids and air from escaping or getting into specific spaces is the function and role of an O Ring. 

Also known as a mechanical gasket, O rings are designed to fit between a groove and a compression during the assembly of two or more parts. It is this that then creates a sealing at the interface. 

Used when pressures are high, o rings provide a vital function across many applications, making o ring suppliers throughout the UK very popular! 

Ultimately, your overall aim is to prevent liquids, gases, powders, and more flowing in and out of a defined space freely. Liquids and gases escaping between the rubber seal and its encasement are not what you want. 

More squeeze also means a better level of force can be maintained for longer, hence again also creating a better overall seal. 

When you consider the role an o ring plays, what it is used for and how it is used, for many, squeezing an o ring until it can’t be squeezed anymore is believed to provide you with a tighter seal. 

And, in some cases, you’d not be mistaken for thinking that yes, a tighter squeeze, means a tighter seal. This is because the more squeeze that you can apply, the greater the force created between the o ring and its hardware. 

However, this is not always the case. 

Depending on other factors and elements, increasing the squeeze and compression set on an o ring will not always result in a better seal. 

In this post, we take a look at some of these instances, if your seals could be affected, and the optimal squeeze that should be applied to ensure optimal performance. 

When increasing the squeeze can have more damaging effects 

O rings can be damaged during installation. Like anything, the more you force it, or the more pressure you apply to it, the increased chance you have of damaging it. 

This notion also applies to o rings. 

The more squeeze you apply to an o ring during the installation, the increased chance you have on nicking them, creating unfortunate opportunities for leaks. 

Research into the optimum squeeze of an o ring shows that when o rings are installed at a 40% squeeze, pinching the o ring was difficult to avoid. 

However, when the squeeze was reduced to 25%, pinching during the installation was virtually eliminated. 

You need to be aware of the compressive load force being applied. Taking into account the compressive load force is necessary in order to help maintain the optimal squeeze.  

Important to note is that a compressive load will rise much faster beyond a 30% squeeze. No one wants to be in a situation where the compressive load could crush or deform lightweight or fragile components. And this is a genuine danger if compressing at 40% as to do this an o ring will require two and a half times more load force. 

The material of the o ring. Different materials do indeed mean different levels of squeeze can be achieved without problems occurring.  

For example, materials such as perfluorinated elastomers and those compounds with low elongation will rupture when squeezed at more than 30% while other materials could experience an accelerated compression set and have less of a life span at a 40% squeeze. 

Meaning you need to take into consideration what you’re sealing and what levels of seal you require to be effective. 

Find Out More Here!

Reasons why an o ring seal will underperform 

  • Thermal degradation 
  • Chemical interactions 
  • Gas permeation 
  • Mechanical damage 
  • Low temperatures, and 
  • Loss of resilience 

In these instances, no matter the percentage of squeeze applied, the o ring will never perform, and the problem will never be fixable. 

The fit and function of an o ring and its overall performance is determined ultimately by the amount of squeeze applied. 

However, being aware of the optimal levels of the squeeze is vital and dependant on the materials used, as well as the application of use. 

In this sense, sometimes more isn’t always better. 

If you’re looking for an o ring supplier in Leeds, who knows their sealing products like the back of their hands, then look no further than Specialist Sealing Products (SSP). On hand to make sure you get the right materials for the right situation, give us a call on 01535 274 776 and see how we can help you today. 

Previous

Next

Contact Us
close slider

Your Details

Let us know how to get back to you.


How can we help?

Feel free to ask a question or simply leave a message.