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Protecting your seals

Dust gets everywhere.  We see it across the surfaces of our homes and even in our workplaces, especially when the light shines through to show it in its full glory!  However, dust that seeps and builds up within engineering equipment can be disastrous.  Causing damage...

Importance of durometer testing

Durometer or shore durometer is a way for industry professionals to measure how hard such things as plastic, rubber, and non-metallic materials genuinely are.  Its focus is to measure on a Shore A or Shore D scale, looking at how robust material is when examining its...

Metal Detectable O Rings

Metal detectable o rings became a necessary must when it was identified that some chemicals, exposure to extreme temperatures, and continuous vibrations could cause failings in standard o rings.  Failings that not only mean a breaking of the seal, but there is also an...

Tips for best o ring maintenance

If o rings are not maintained, leaks can occur, and water and other fluids can enter the appliance or application, and even product in the mix!  If this happens, damage can occur to internal parts and mechanisms, causing deployment failings, potential false readings,...

What you need to know about O Ring Lubricants

Silicone grease and lubricants aren’t just a nice to have for o rings, but they can quite often be a must-have.  However, with so many greases and lubricants to choose from, it can often be a minefield choosing the best ones and the right ones for your o ring and...

O Ring Replacement

Replacing an O Ring in pressure washer wands is probably one of the most common replacements you'll find when working with seals.  Unfortunately, O Rings don't last forever, and over time they do deteriorate, and you will require an O Ring replacement.  It's important...

Reasons behind seal failure and a look into seal replacement

Unfortunately, there are occasions where O-rings, in particular, fail.  The failure of these seals is not simply due to one factor, but various factors that can occur across a range of applications – hence why locating the exact cause of such problems is just that, a...

Gaskets and seals for Aerospace

Gaskets and seals used for aerospace applications and equipment must be of premium quality and to a substantially high standard.  They are used across a range of applications such as radars, antennas, lighting, access panels, electrical conductivity, pressure sealing,...

Finding the best sealing materials for Food Grade Applications

You will find rubber seals across various industries, providing an important element and operating as a vital fixing across a wide range of different applications and equipment.  However, these FDA gaskets must follow strict, set guidelines, in terms of their material...

The Evolution of Gasket Solutions

When we talk about gaskets and the history of a gasket, we must start at the very beginning.  What is a gasket?  Ultimately, a gasket is a manufactured seal that is used to fill the gap/space between two or more surfaces.  Gaskets are typically manufactured by cutting...

Compressed Non-Asbestos Fibre Material (CNAF) 

This range of products have been designed and manufactured to replace the now extinct and banned range of Asbestos based gasket materials. 

Manufactured from a mixture of organic fibres and rubber binders, with fillers based on synthetic fibres, mineral fibres, carbon, aramid and glass fibres this range of sheeting products offer great versatility thanks to their highly flexible chemical and physical properties ensuring sealing of maximum reliability and durability even in critical sealing applications. 

There are 3 main sub categories of CNAF materials each category having several different versions using a blend of different fibres and fillers to meet varying service conditions to seal media at a range of temperatures and pressures. 

This range of products are available from stock as cut gaskets or in sheet form up to 2 metre x 1.5 metre and in a range of thicknesses up to 3 mm as standard 

Grade X

Superior performance CNAF sheet jointing with excellent mechanical properties and good chemical and temperature resistance. The manufacturing compounds are based on Glass, Inorganic and Aramid Fibres bound with high quality Nitrile NBR binder meeting the requirements of BS7531 Grade X. 

  • WRAS / WRC Approved for use in hot and cold potable water 
  • API 6FB Fire-Safe 
  • TA-Luft (clean air) in accordance with VDI guideline 2440 
  • Temperature from –200⁰C up to 400⁰C 
  • Maximum Pressure up to 120 bar 
  • Excellent resistance to solvents, refrigerants, water and steam 
  • Media compatibility with oils, fuels, solvents, and hydrocarbon compounds 
  • Suitable for use with Oxygen Service 

Grade Y 

High quality CNAF sheet jointing specifically developed to meet the requirements of BS 7531 Grade Y. 

These have compressed aramid fibres with a combination of other functional fillers bound with a high quality nitrile rubber and are suitable for use across a broad range of industrial sealing applications.  

  • WRAS / WRC Approved for use in potable water 
  • Fire-Safe 
  • TA-Luft (clean air) in accordance with VDI guideline 2440 
  • Temperature from -200⁰C up to 450⁰C 
  • Maximum Pressure up to 140 bar 
  • Resistance to solvents, refrigerants, water and steam 
  • Media compatibility with oils, fuels, and hydrocarbon compounds 
  • Suitable for use with Oxygen Service 

General Service Grade 

A cost effective grade of CNAF sheet jointing based on a mixture and blend of fibres bound with a nitrile rubber binder. Suitable for general use including oils, hydrocarbon compounds and low pressure steam and water 

  • Temperature from –100⁰C up to 250⁰C 
  • Maximum Pressure up to 50 bar 
  • Resistance to solvents, refrigerants, water and steam 
  • Media compatibility with oils, fuels, and hydrocarbon compounds 
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