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Spring‑energised seals

The high‑performance answer to fluid sealing problems where conventional products fail to give the integrity or reliability required.

Spring-energised seals are far from new - we have been manufacturing them since the 1940s. But we now offer a full range of Unilion precision-engineered products that meet the following parameters:

  • Used successfully on applications at up to 103 MPa/15000 psi
  • Cryogenic duties down to -260°C
  • Temperature excursions up to +300°C
  • Resistance to corrosive media
  • Efficient dynamic operation following long stationary periods

Based on these operational benefits, we recommend Unilion for applications that preclude the use of more conventional elastomeric/polymeric seals on arduous duties in areas such as:

  • Oil and petrochemical
  • Cryogenic plant
  • Aerospace
  • Food and pharmaceutical processing
  • Automotive and general industry

Moreover, Unilion spring energised seals have no storage period limitation. They can safely be held in stock on-site to meet OEM and maintenance requirements.

As a single Unilion can often perform three sealing duties - static, reciprocating and rotary - this can also reduce your stockholding requirements and simplify inventory control.


Unilion spring energised seals guide


Unilion® standard profiles

An overview of how the spring energised seal works and details of our standard Unilion profiles.

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Unilion® standard profiles

Fluolion® materials

An overview of our standard materials for Unilion spring energised seal jackets.

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Fluolion® materials

Expert to Expert

Want to discuss your project, engineering or materials challenge expert to expert? Simply provide us with your contact details and a little information about the application you are working on, and one of our experts will contact you as soon as possible.

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