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The job of an anti-extrusion ring

O rings perform an essential job supporting various applications. Creating a tight seal between the two housing parts that hold it, o rings help prevent liquids and gases from escaping from an application, preventing any detrimental harm and defects from occurring....

What Gaskets Are Best for High-Pressure Vessels?

When it comes to the choice of gaskets on the market today, it can feel quite overwhelming to know which is the right option to use alongside high-pressure vessels. The pressure in these types of vessels can be extremely dangerous and explosive when they are not...

O-Ring Squeeze Ratios – Everything You Need to Know

If you need to install an O-ring seal, you might be wondering what you need to know about squeeze ratios. Specialist Sealing Products offers a wide range of products for your needs, and we’ll be here to help you when selecting the right design and material for your...

Spiral Wound Gaskets and Their Use in the Power Generation Industry

Within the power generation industry today, there are constant challenges to face. Over the past decades, many changes have occurred in this industry, with different fuels used to produce energy. In order to withstand the high temperatures and the conditions of this...

Shelf life of an o ring

It may seem a surprising topic of conversation, but when it comes to o rings and seals, it's important to note that they do have a shelf life, which, if not monitored and regularly checked, can affect their quality and overall performance.  How and where you store...

What are Encapsulated O-Rings?

When discussing the various o-ring options on offer, you might hear encapsulated o rings being discussed. This type of o-ring offers many advantages to manufacturers, but you’ll want to ensure you understand its proper application before purchasing...

Everything You Need to Know About Large O-Rings

Large O-rings, which are often referred to as giant o-rings, are used in a wide variety of applications. They are primarily needed for jobs where heavy machinery or equipment are used, but you’ll find there are a variety of options on the market when choosing large...

How to Avoid Pipeline Flange Corrosion

Our team is all too aware of the risks of corrosion, but it’s something that you can work to avoid in your home and workplace. Preventing corrosion isn’t always an easy task, which is why it’s such a common problem within buildings in the UK. Visit our homepage for...

O-rings suitable for the pharmaceutical industry

O rings are widely used across various industries to support a variety of different pieces of equipment and applications.  They provide an essential function and are ultimately moulded and manufactured to ensure they provide a continually high level of quality through...

The Best Chemical Resistant Gaskets for Sulfuric Acid

If you are using sulfuric acid on a regular basis within your industry, you might be aware of how corrosive it can be. While it can be useful for dyes, explosives, fertilisers, and many more applications, finding a chemical resistant gasket can often be one of the...

Materials that can be Used in Producing Gaskets

Materials that can be Used in Producing GasketsSeals and gaskets are meticulously manufactured to be able to withstand the exacting conditions under which they function. Not only does a gasket seal two distinct parts and allow the containment of extreme temperature fluids, steams and gases, but it must meld the sealed surfaces and not extrude.    

Its requirements extend to remaining stable and whole as this lends to the durability of the application in which it is used. Taking these demanding necessities into consideration means a gasket manufacturer must use the latest technology and the best materials to produce an acceptable product.    

Common Materials used in Gaskets 

Gasket materials can be divided into four basic categories.   

Elastomeric Materials 

Standard gasket production involves fabricating from sheets of materials. The most common form of sheet material used is an elastomer mixed with anonymous filler/fibre 

  • Butyl rubber: Resistant against ozone, gas, mild acids and alkalis; weakens on exposure to oil or fuel.  
  • Chlorosulphanated polyethene: Resistant against acids, alkalis, oil and fire.  
  • Ethylene propylene diene: Resistant against ozone, steam, acid, and alkaline liquids and vapours; unsuitable for proximity with solvents and aromatic hydrocarbons.  
  • Fluoroelastomer: Resistant to many corrosives, oils, aliphatic hydrocarbons and acid; unsuitable for proximity to esters, steams, vapours, amines and ketones.  
  • Rubber: Flexible with excellent resistance to acid/alkalis and salts; unsuitable for proximity to oil or solvents; weakens when exposed to long-term oxygen, ozone or UV/sunlight.  
  • Neoprene®: Withstands oils, ozone, sunlight/UV exposure, mild acids, alkalis, salts and solvents.  
  • Nitrile: Resistant to chemicals and temperatures, hydrocarbons and oils/fuels. Unsuitable foresters, ketones, strong oxidants and petroleum derivatives.  
  • Ask the experts at Specialist Sealing Products for more in-depth information about other elastomeric materials and their properties that are used in the manufacture of gaskets.  

Fibrous Materials 

Fibrous materials are well suited to any application that requires constant fibrillation without extrusion or wear and tear.   

  • Aramid: Kevlar is the best-known use of aramid which is composed of polymer fibres linked in rings. This structure gives an aramid gasket strong stability when used within a medium temperature range.  
  • Asbestos: This material still has its uses in gasket manufacture because of its extreme resistance to heat as well as pliability and strength.  
  • Carbon fibre: A gasket made from carbon fibre does not retain or build up the heat; it disperses it, and this must be taken into consideration with the surrounding parts in the application. It is widely resistant to chemicals and acids/alkalis.  
  • Cellulose: The constituent that makes plant stalks; it is bendable yet strong. It imparts these properties to gaskets.  
  • Glass: Not brittle; strong and chemical resistant.  
  • Mineral wool: Gaskets made from this man-made fibre are best suited to medium temperatures.  

Other Gasket Materials and Types 

  • Flexible graphite 
  • Mica 
  • Cork 
  • PTFE (Teflon™)

Metallic Materials 

Gaskets types made from metallic materials are best suited to sealing higher temperatures and pressures. They are mostly used for applications such as compressors, pumps, valves and condensers. They are manufactured from carbon steel, titanium alloy, aluminium and copper.   

When unsure whether an application should use a metallic, fibrous or elastomeric gasket, reach out to an expert at Specialist Sealing Products for advice on the best gasket type. Their extensive knowledge of seals and gaskets will set you up for success.

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