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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...

How to preserve your gasket

Gaskets and seals don’t last forever. However, they are designed, or they should be, last for a considerable period.  In this sense, it is vital to look at ways to preserve your gaskets in order to avoid any application downtime.  Downtime that involves additional...

Important Design Features of Rubber Sealings

When it comes to designing the perfect rubber sealing, there are a few design features to bear in mind to help achieve the optimum solution.  In this post, we explore these rubber sealing features further and provide information on the benefits and best uses for these...

Optimal Squeeze for an O Ring to be effective

A doughnut-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...

High-temperatures and O Rings, what you need to know

Fluctuations in temperature and indeed heat is a significant factor across many applications that make use of o rings.  However, what is well known is how destructive heat can be when it comes to compound deterioration.  You are making choosing the ideal o ring...

How to restore your damaged rubber seals

Under the right circumstances and having the right tools to hand, you can restore rubber gasket seals and have them working as good as new in no time.  Rubber gasket seals provide a seal between two separate mechanisms, providing airtight seals to keep liquids and...

The importance of backup rings to O rings

Backup rings are ultimately used to help stop o ring migration, and they achieve this in both static and dynamic fluid power applications as the pressure cycles occur, preventing the extrusion of an o ring in the gap.  Ultimately a backup ring is a rigid ring that...

Gasket manufacturing process explained

Specialist Sealing Products have been providing high-quality gaskets to customers throughout the UK for many years. We pride ourselves in the range of gaskets we have available, suitable for a variety of applications across a range of industries.  Rubber gaskets are...

Designing seals for the food industry

There’s a number of factors to take into consideration when designing seals for the food industry. That’s because seals used within this sector need to work exceptionally hard in all food processing environments where hygiene and health and safety are of the utmost...

Storing your gaskets!

A strange headline for a gasket article, we know.  However, it’s an important area and one, which in this sector is often overlooked.  When we think about most products or items in and around our homes and business, we will recognise that most come with manufacturing...

Graphite Gaskets and Sheeting Material 

Graphite has become a very popular gasket choice for sealing applications requiring high performance combining excellent chemical resistance with an exceptionally wide temperature range from cryogenic to above +400⁰C and having excellent resistance to stress relaxation at elevated temperatures. 

This exfoliated graphite material is available in purity grades of 95% to 98% and 99.5% for nuclear applications 

There are many different versions within this family of graphite based materials ranging from plain homogenous graphite to being laminated and reinforced with stainless steel, nickel, aluminium and many other metals should such service conditions require. Materials are also available with ‘multi-layers’ offering even greater resistance to higher pressures or with polymeric layer ‘clean’ coating to aid handling. 

  • Outstanding resistance to high and low temperatures 
  • High compressibility 
  • Resistant to virtually all media 
  • High pressure  
  • Unlimited storage life  

Although we have many versions available within the graphite family most applications are covered with four primary options 

Plain Homogenous Graphite 

This material is manufactured from expanded graphite foil without any form of insert or reinforcement. This is available in purity of 98% for standard grades and 99.5% ultrahigh purity for use in applications within the nuclear industry. 

  • Maximum Temperature (oxidising media) +400⁰C 
  • Maximum Temperature (inert/reducing media) +2500⁰C 
  • Minimum Temperature -200⁰C 
  • Low coefficient of friction and excellent residual stress 
  • Very easy to cut 

Nickel Reinforced Graphite 

This is a jointing of 98% purity exfoliated graphite sheet with a reinforced adhesive bonded layer of nickel foil. Recommended for use in general sealing applications.  

  • Maximum Temperature (oxidising media) +400⁰C 
  • Maximum Temperature (inert/reducing media) +1000⁰C 
  • Minimum Temperature -200⁰C 
  • Excellent sealing integrity 
  • Very easy to cut, handle and install 

    Stainless Steel Reinforced Graphite

    This is a jointing of 98% purity exfoliated graphite sheet with a reinforced adhesive bonded layer of flat 316 stainless steel. Recommended for use to seal a wide range of media in both high and low temperature and pressure applications.

     

    • Maximum Temperature (oxidising media) +400⁰C
    • Maximum Temperature (inert/reducing media) +700⁰C
    • Minimum Temperature -200⁰C
    • Excellent sealing integrity
    • Very easy to cut, handle and install
    • High Compressibility
    • Resistant to virtually all media
    • Good leakage properties

    Stainless Steel Tanged Graphite 

    This is a jointing of 98% purity exfoliated graphite sheet with a reinforced mechanically bonded layer of tanged 316 stainless steelThis insert allows the product to be used for applications involving high sealing stresses and requiring high blow-out resistance in industries such as petrochemical and process. 

    • Maximum Temperature (oxidising media) +450⁰C 
    • Maximum Temperature (inert/reducing media) +2500⁰C 
    • Minimum Temperature -200⁰C 
    • Exceptional resistance to blow-out and crushing 
    • Strong composite construction without adhesives 
    • Excellent resistance to steam 
    • Extra strength for ease of handling and installation 
    • High Compressibility 
    • Resistant to virtually all media 
    • Good leakage properties 
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