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Flange Faces

As you start to consider purchasing flanges or gaskets, you’ll see a variety of terms used that you may not have come across before. Flange faces are the surface area that will receive the gasket, allowing them to come together to create a seal when put under...

Octagonal Ring Type Joints

A ring-type joint is a metallic ring that is machined to sit between two mating surfaces, where it will be compressed to provide a high-quality and reliable seal. Ring-type joints are vital components in various applications across multiple industry sectors,...

Blind Flange vs Blank Flange

Small pieces of mechanical equipment flanges continually play a vital role across numerous industries and applications. In essence, we use flanges to connect pipes to each other, with flanges also found in valves and specific application fittings too. Due to the...

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...

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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. 

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