Encapsulated seals were primarily designed to solve the growing problems of sealing corrosive fluids in industry. This development provided designers and engineers with a seal that combined the chemical resistance of Teflon® with the resilience of rubber.

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A seamless Teflon® (FEP or PFA) jacket surrounds an elastomer core providing the chemical inertness, whilst the memory in the elastomer core energises the seal.

Encapsulated seals are available with two types of Teflon® jacket - FEP which is standard, and PFA for more demanding applications.

The energising core is available in Viton®, Silicone or EPDM.  Viton® is offered as the standard because of its superior compression set. For low-temperature applications, or where lower closure forces are required either a solid Silicone or hollow Silicone core is specified.

Our standard core has an incredible Compression set of  only 4.6%…
and our Silicone core only 9.2%

We can offer other non-standard cores such as: FDA Metal detectable or USP Class VI - please contact our sales office for more details.

The design variations available, together with combined performance characteristics of both the jacket material and elastomer core , ensures that encapsulated seals will be an effective solution for many troublesome applications.

The standard available styles of Enacapsulated seal are O-rings, Cam and groove gaskets and Milk coupling gaskets to DIN 11851.

For a more detailed description of Teflon® Encapsulated seals please download a copy of our brochure.