Back-up Ring | Aircraft MIL Grooves | Trelleborg

Back-up Ring
Back-up Rings are commonly used to protect seals from the effects of extrusion when pressurised adjacent to a housing gap. A wide range is available to suit all seals and grooves. Usual configurations are Spiral, Scarf cut, Uncut and Concave and materials range from Virgin Polytetrafluoroethylene (PTFE), through the range of filled grades, up to the high modulus grades of engineering thermoplastics. Back-up Rings can be used statically or dynamically, over a broad temperature and pressure range.
Back-up Ring
Technical Drawing

Technical Details 

  • Reciprocating
  • Oscillating
  • Rotary
  • Helix
  • Static
  • Single acting
  • Double acting

PDF Catalogs

For full engineering information and installation, please use our PDF catalogs