Durability and Reliability in critical applications

Spring Energized Seals


Spring Energized Seals are essentially spring-loaded u-cups, which are sealing elements that combine high-performance polymer “seal jackets” with recent advances in spring technology as “jacket energizers”. This unique combination of matching suitable materials for the seal and the spring allows our customers to seal under some of the most extreme service conditions, such as high-temperature environments, the presence of harsh chemicals, or the need for a very low friction solution. Spring Energized Seals can be developed to fit all standard hardware glands, though they can also be designed to match any non-standard housings. Furthermore, sealing profile geometries can also be modified to alter sealing performance.


  • Low coefficients of friction
  • Maintains high performance over a very long sealing life
  • Can handle rapid changes in temperature
  • High-temperature range
  • Can be incorporated into new tool design to customer specification
  • Stick-slip-free operating for precise control
  • Wiping action from multiple lips design.

Typical Parameters


-200°C to +260°C
-328°F to +500°F


25 ft/s


5,000 psi

Spring Energizers

Three different spring types may be chosen in the design of an EngiSeal®. Each type displays different capacities in load curve, unit loading and deflection range. These are canted coiled springs, helical springs and V-springs.



rd engiseal canted

Canted coiled springs: Code SPR-C

Produces a very flat load curve when compressed. Providing constant, predictable loads throughout a very wide deflection range, canted coiled springs are used to energize U-cup seals and other components.


rd engiseal helical

Helical springs: Code SPR-H

Produces a very high unit load over a narrow deflection range. Constructed from flat ribbon stainless steel and other alloys wound into a helical form with a round cross-section, helical springs are used in U-Cup seals and other components.


rd engiseal vsprings

V-Springs: Code SPR-V

V-Shape geometry produces a moderate load over a wide deflection range. The stainless steel (or other alloys) cantilever design of a V-spring is applied as a radial or compression energizer inside a U-cup seal and other components.


Quality You Can Rely On


All parts are measured on our Zeiss O-Machine and or Keyence CMM, which utilize optical and contact measurement technology in a comprehensive analysis. The O-Machine includes multi-sensor coordinate measuring, white light sensors for non-contact assessments and extremely accurate 3D scanners.

We follow AQL 2.5 levels 1 and 2 sample size quantities, and all molded parts are manufactured to RMA A2 tolerances. 

What comes with your orders:

  • Every order is sent with either a paper or digital QC document that includes ID, OD, C/S, Height, angles, and any other dimensions your organization feels critical. 


Our rubber and plastic materials supply is diversified amongst the top compounders in North America. Each polymer has been qualified to meet typical exploration and production well conditions, including mechanical, tribological, thermal, and specific immersive properties.

What comes with your orders:

  • Every order comes with an MTR that includes a batch number, cure dates, and a set of mechanical properties.

Available Compounds

Let’s Talk

You’ve made it this far, but we know there is still more to discuss. Click on the book a meeting button below to easily setup up a date and time to talk more about your project. You can also email us at info@kcseals.ca

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