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O Ring Colour Identification

O rings come in various colours, and it's important to understand what these colours indicate as the o rings you choose will affect your overall process application.  Ultimately, different o ring colours are used to help differentiate between different materials. ...

Spiral Wound Gasket Compressibility and Pressure Ratings

In order to form a reliable seal, spiral wound gaskets do require a certain degree of pressure.   The applied pressure allows the gasket to be compressed tightly between the mating surfaces preventing any leaks from occurring.  Factors such as operating temperature...

Elastomeric Compounds

What is elastomer?  Elastomeric compounds are rubber seals produced using natural rubbers or manufactured by the chemicals industry.  Elastomeric sealing compounds consist of between 50-60% rubber; the remainder of the compound consists of fillers,...

Is there such a thing as the right flange gasket?

We cannot stress enough how important gaskets and seals can be. Gaskets are vital for an application's reliability and integrity, and trust us when we say, choosing the right gasket now can help you avoid costly issues in the future.  Taking a closer look at pipe...

Plastic gaskets, the best alternative to metal

Plastic gaskets and seals are not that uncommon.  In fact, they’re used in many devices due to the longevity and functionality they offer.  Helping to prevent leaks and maintain temperature control, plastic gaskets help equipment and appliances operate to the best of...

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...

What is a Spiral Wound Gasket?

Spiral Wound GasketFor daily purposes, gaskets are merely indispensable. Hence, it makes total sense when one thinks of having a gasket that can withstand variable fluctuations in pressure and temperature. It should also survive in situations such as flange rotation, adequate creep and bold stress relaxation, optimum flexibility and much more. This is where a spiral wound gasket comes in handy. These types of gaskets are usually manufactured in a combination of a pre-formed engineered strip of metal and a filler material; both of which must be alternating each other. In doing so, the design offers an excellent seal at the time of being compressed. In fact, the metal strip has been shaped such that it looks more like a loaded spring and that is a resilient one, under diverse situations.

Meant for multiple purposes

The spiral wound gaskets or SWGs are usually meant to fulfil a number of tasks, particularly in piping systems all over the world. Besides this, their cost is the bare minimum and stands out for extreme durability and flexibility. Another plus factor is that the use of it is not limited to any pressure class. The shape has also been made such to resist blowouts. On account of these and more, the industry has assigned the tag of ‘fire safe’ gasket to this one.

Many however make a mistake of assuming that all spiral wound gaskets are the same, which is not so. It is primarily owing to metal quality, filler quality (like thickness, grade, density), machine-made or not that is capable of controlling pressure and tension on gasket winding; all of which are strong determiners of the differences in the quality of gaskets.

Common styles of gaskets used

Ideally, there are three standard styles of spiral wound gaskets, which are as follows:

  • Style D: This consists of only a sealing element (D), meant for several applications and variable conditions.
  • Style DR: This one has only a sealing element (D) and a centring ring (R), which is more of an external body that centres gasket on a primary flange face and functions as a compression stop.
  • Style DRI: This has a sealing element (D), the centring ring (R) and the inner ring (I), which helps the gasket to stay protected from any form of corrosive substance and high temperature and pressure (usually inward buckling happens for the latter).

Benefits and applications are aplenty

The fact that spiral wound gaskets have been made so rigidly is why stability is supreme. Also, their designs have equipped the gaskets to withstand the extreme level of exhaustion without showing any dip in performance.

For the ideal sealing solutions in heat exchangers, utility holes, boiler hand-holes and flanged joints, this is the type of gasket that one should choose over anything else. The make is such that any form of toxin or corrosion is taken in very well by this gasket.

One can browse through the different companies that stock these items like Specialist Sealing Products and thereby make a right purchase. It is only after using one will come to know the key reasons behind its immense popularity.

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