Parker’s Metal Seals (E-rings / E-Seals) are designed for high-temperature applications where the sealing gap enlarges due to operating pressure and thermal influences. In aircraft, such operating conditions occur especially in turbines. Metal E-Rings in aerospace applications are used as casing seals in high-temperature areas between the casings of the compressor, combustion chamber and turbine. These sealing areas pose special challenges in terms of high temperatures, high pressure and flange separation of the mating hardware.

Parker’s portfolio includes Metal E-Rings for internal and external pressures and a wide range of available sealing cross sections for challenging applications. Metal E-Rings are made of nickel alloys for temperatures of up to 870 °C and exhibit high elastic recovery. For applications involving greater relative motion of the flanges, Metal E-Seals can be plated with T-800 or Tricom for wear protection of the flanges and seal.

For applications involving the risk of damage during installation, the seals may be manufactured as pre-compressed versions that are retained in this condition by means of an adhesive. In the application, the adhesive dissolves and the seal opens. The adhesive turns into a fine powder.

Product Benefits:

• High elastic recovery.

• Large number of custom cross sections available.

• Diameters of up to 1,720 mm can be manufactured as full hoops; larger diameters are produced as split seals.

• Chamfered surface contact area protects mating surface.

• Defined fatigue strength.

• Available in diverse high-strength/high-temperature-resistant nickel and cobalt alloys.

• Available with HVOF (High Velocity Oxygen Flame) wear-protection coating.

• Available with electroplated wear protection.

• Specially sized E-rings are designed to fit all AS1895 (dash number -100 to -750) flanges.

Range of Application:

Aerospace Applications

• Diverse high-temperature applications, especially in aircraft turbines

General Industrial Applications:

• High-temperature pneumatic connections

• Gas turbines

• Flanges with very low compression forces

• Flanges with heavy flange movements

Available materials:

Metal-E-rings are manufactured from unplated Alloy 718, solution annealed, and age-hardened in the standard configuration. Other high strength/higher temperature nickel alloys are available including Waspaloy and Rene 41.

Please contact us for more information:

Our application engineering team will be happy to discuss your requirements and work with you to find the best solution for your application profile.