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KENOL® Joints 

Sealing Concept

The high level of sealing achieved with KENOL® joints is based upon the principle of controlled plastic deformation. With KENOL® it is achieved by causing the plastic deformation of a thin metal sheet, compressed between a plain and an annular surface. These surfaces are harder than the metal sheet and can only be deformed within the elastic range.

This metal sheet, called the “seal cup” enables the two interfaces to make perfect contact and guarantees sealing. The plastic deformation of the seal cup only occurs over a small area in order that the force required to obtain sealing is reduced.

Long-term sealing is achieved as the plastically deformed section of the cup seal is held captive (volumetrically) between the two surfaces that work within their elastic range.

For more information on KENOL® Joints and how Technetics can custom-engineer a solution for your application, contact us.



In certain cases it is possible to envisage reusing the seals. This involves elementary precautions that make it possible to preserve the integrity of the centering ring - However, it is essential to change the seal cups.

General Characteristics

  • Sealing better than 1.10 -9 atm cm3. sec.-1 helium
  • No seal creep
  • Temperatures - 270 °C to + 600 ° C (for transient problems, consult us)
  • Tightening force: low compared with other metal seals
  • Suitable for machined surface conditions Ra 0,2 to 3,2
  • Pressure: ultrahigh vacuum to several hundred bars.


All engineering and industrial fields where a high level of sealing is required, particularly for the following:

  • Vacuum and ultrahigh vacuum technology
  • Particle accelerators
  • Cryogenics
  • Aerospace
  • Petrochemicals
  • Electronics
  • Physics laboratories
  • Nuclear industry, etc