Corseal

Name: Corseal
Address: Sudbury, Suffolk, CO107PZ, GB
Telephone: +44 1787 282444

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Corseal Ltd specialise in high performance Fluid handling and Sealing Solutions to keep industries moving. 20 years of quality, trust and innovation.

Corseal Ltd specialise in Gaskets & Rubber products . With 25 years of experience in the industry, Corseal is
fully committed to it's service and reliability. Also Spring 2013 brings the launch of our new online-shop.

20/10/2026

When we'd specify ePTFE instead of conventional PTFE and when we wouldn't.

PTFE and ePTFE may share excellent chemical resistance, but from a sealing perspective, they're not interchangeable.

The decision becomes particularly important when you start considering available bolt load, fl**ge rigidity, surface condition and the gasket's ability to maintain sealing stress in service.

Where ePTFE can have the advantage

The expanded structure of ePTFE gives it significantly greater conformability than conventional virgin PTFE sheet.

That can make it particularly useful where:

• Fl**ge surfaces are irregular or imperfect and the gasket needs to accommodate local variation.

• Available bolt load is limited, particularly on more fragile fl**ge systems where excessive tightening isn't desirable.

• Fl**ge rigidity is relatively low, such as certain glass-lined, FRP or plastic systems.

• Large or non-standard fl**ge geometries make producing or installing a conventional sheet gasket less practical.

Its ability to conform under load can help establish a seal where a comparatively rigid gasket would require greater compressive stress.

But ePTFE isn't automatically the better PTFE gasket.

Where you have rigid, accurately machined fl**ges with sufficient and controllable bolt load, a conventional PTFE sheet gasket may be entirely appropriate.

The selected PTFE grade can also provide greater dimensional stability where that is important to the joint design.

And creep still matters.

PTFE materials are viscoelastic. Under sustained compressive load they can deform over time, reducing the stress retained within the bolted joint.

That means we're not only interested in whether the gasket seals during assembly.

We're interested in whether the joint can maintain sufficient gasket stress throughout its operating cycle.

Temperature cycling, internal pressure, fl**ge movement and relaxation within the joint all become part of that assessment.

So the question isn't:

“Is ePTFE better than PTFE?”

It's:

“Which material gives this particular joint the best chance of maintaining an effective seal?”

For us, that starts with the fl**ge design, surface condition, available bolt load, operating temperature, pressure and process media not simply the material name on the gasket specification.

**geJoints

15/10/2026

The gasket failed but was the gasket actually at fault?

A failed gasket is often treated as the obvious culprit.

Remove it. Replace it. Tighten everything back up. Get the plant running.

But if the underlying cause hasn't been identified, there is a good chance the same failure will happen again.

When investigating a failed gasket look beyond the gasket itself.

Joint assembly
Was the gasket installed correctly? Was the fl**ge aligned? Was the tightening sequence appropriate?

Bolt loading
Did the joint achieve the required compression? Was the load applied evenly across the fl**ge?

Fl**ge condition
Are the fl**ge faces damaged, distorted, contaminated or outside the expected surface condition?

Operating conditions
Has the actual temperature, pressure or process media matched the original specification?

Material compatibility
Could chemical attack, swelling, embrittlement or degradation have contributed to the failure?

Gasket selection
And yes sometimes the material, construction or dimensions simply weren't suitable for the application.

The key point is that gasket failure and gasket fault aren't necessarily the same thing.

The failed component can often give you clues about what actually happened.

Before replacing it, preserve the evidence.

Photograph it. Examine the compression pattern. Inspect the fl**ge faces. Review the operating conditions.

The right replacement starts with understanding why the first one failed.

12/10/2026

When a gasket fails, the instinct might be to replace it and get the system running again.

But before the old gasket goes in the bin, take a closer look.

A removed gasket can provide useful clues about what happened within the joint:

• Uneven compression – could indicate inconsistent bolt loading or fl**ge distortion.
• Localised damage – may point towards misalignment or an issue with the fl**ge surface.
• Swelling, softening or deterioration – could indicate incompatibility with the process media or operating conditions.
• Extrusion or excessive deformation– may warrant looking at gasket thickness, pressure, material selection and joint design.
• Little evidence of compression – could suggest the gasket never achieved sufficient sealing stress.

The important point is that a leaking joint doesn't automatically mean the gasket itself was the problem.

Replacing it without investigating the failure mechanism can simply mean repeating the same failure.

Before replacing a failed gasket, document it. Photograph it. Examine the compression pattern. Check the fl**ge faces and review the operating conditions.

The old gasket might contain some of the most useful evidence you have.

09/10/2026

WRAS approved material is not equal to WRAS approved assembly.

It’s an important distinction when specifying sealing materials for use with potable water.

A WRAS material approval demonstrates that the non-metallic material tested has met the relevant requirements for its suitability in contact with wholesome water.

But that doesn't automatically mean every finished product, component or complete assembly manufactured using that material carries its own WRAS approval.

For engineers and specifiers, that means it's worth looking beyond the words “WRAS approved” and asking:

• What exactly holds the approval — the material, component or complete fitting?
• Does the approval cover the particular material/grade being supplied?
• Is the approval current and applicable to the intended use?
• Are there any conditions or limitations associated with it?

This distinction becomes particularly important when specifying gaskets and seals for potable-water applications.

At Corseal, we supply WRAS-approved EPDM material for applications where an approved sealing material is required.

The specification still matters.

Approval tells you something important about the material. It doesn't remove the need to specify the rest of the application correctly.

06/10/2026

Not every sealing problem starts with a part number.

Sometimes you know exactly what gasket you need. Other times, you simply know the conditions it needs to perform in.

That’s where we can help.

Send us the details of your application, including:
• Operating temperature
• Pressure
• Dimensions
• Media/material being sealed
• Quantity required
• When you need it

From there, our team can help identify a suitable material and sealing solution for the application, whether it’s a standard gasket or a replacement for something that’s proving difficult to source.

You don’t need to know the part number. You just need to know the problem.

Get in touch with the Corseal team to discuss your application.

01/10/2026

A couple of weeks ago, we had the pleasure of attending the UK Gasket & Sealing Association Gala, which was particularly meaningful for us this year.

During the evening, the Association introduced a new Outstanding Achievement Award in memory of our much-missed Nick Salt, proudly sponsored by Corseal.

Nick was an avid golfer and a familiar face at the Association’s golf events over the years. He won the Champion Award in 2023 and was part of the winning Team Four Ball in both 2021 and 2023.

But golf was much more than a competition to Nick. It was something he genuinely loved and a big part of his life. He played regularly with family and friends and in June this year, enjoyed what would sadly be his final golfing trip away with his golf group, just a few weeks before he passed away.

Seeing an award introduced in his memory within a sport that brought him so much enjoyment over the years was incredibly special for all of us.

We’re very proud to sponsor the Outstanding Achievement Award and to see Nick’s name and memory continue to be part of an event he enjoyed.

A very special tribute to a very special man.

28/09/2026

Recently, we had the pleasure of taking part in the UK Gasket & Sealing Association’s Charity Golf Day and Gala Dinner.

It was a fantastic event, made even more memorable for the Corseal team when our very own Office Manager, James Salt, was crowned Overall Champion! 🏆⛳

A brilliant achievement and a proud moment for the whole team.

A huge thank you to the UK Gasket & Sealing Association for organising another fantastic event, bringing the industry together while raising money for charity.

And, of course, congratulations to James on bringing the trophy home! 👏

20/08/2026

Is sustainability about recycling... or about making products last longer?

When sustainability is discussed, the conversation often focuses on recycling, packaging and reducing waste.

Those things matter.

But we think sustainability starts much earlier.

It starts with designing and supplying products that simply last.

A gasket that performs reliably for twice as long doesn't just reduce waste. It also means:

* Fewer replacements
* Fewer deliveries
* Less maintenance
* Less downtime
* Lower lifetime costs

Sometimes the most sustainable solution isn't replacing a product more often with something new.

It's choosing the right product in the first place.

At Corseal, we believe durability and sustainability go hand in hand. Helping customers extend the life of their equipment isn't just good engineering, it's good for the environment too.

Small components can make a big difference.

What's your view? Is product longevity one of the most overlooked aspects of sustainability in manufacturing?

17/08/2026

We think the most valuable question in engineering is also the simplest...

Why?

When a seal fails, the natural reaction is to replace it.

New gasket.
New seal.
Problem solved.

But is it?

At Corseal, we believe the better question is:

Why did it fail in the first place?

Was the material right for the application?

Was the fl**ge damaged?

Was it installed correctly?

Was it exposed to temperatures or chemicals beyond its design limits?

Too often, replacing the component treats the symptom rather than the cause.

Taking the time to understand why something failed can prevent repeat failures, reduce costly downtime and improve reliability for years to come.

In our experience, curiosity is one of the most underrated skills in engineering.

The businesses that ask why don't just fix problems; they prevent them.

What's the most common cause of seal failure you've encountered? We'd love to hear your experiences.

14/08/2026

Has technical advice become an undervalued part of engineering?

The internet has made it easier than ever to buy components.

A few clicks, next-day delivery and you're done.

But buying a gasket isn't the same as buying the right gasket.

At Corseal, we've always believed that understanding the application is just as important as supplying the product.

What temperature will it be exposed to?

What chemicals will it come into contact with?

What pressure is it operating under?

How often is it being maintained?

These are the conversations that make the difference between a solution that lasts for years and one that fails when you need it most.

We still believe there's real value in picking up the phone, asking the right questions and sharing technical knowledge built over decades of experience.

Because sometimes, a ten-minute conversation can prevent hours of downtime.

The easiest solution isn't always the right one.

What do you think? Has technical advice become an undervalued part of our industry, or is it more important now than ever?

Address

Sudbury
Suffolk
CO107PZ

Telephone

+44 1787 282444

Website

http://www.corseal.co.uk/

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