Backup Ring

Hallite backups are manufactured from high quality thermoplastic polyester elastomer (TPE). This tough material is long wearing with very good abrasion resistance in both dynamic and static applications and improved extrusion resistance compared to standard urethane or NBR backups. It has high temperature capabilities up to 275°F (135°C) along with a broad range of fluid compatibility including water based fluids.

•  Highly extrusion resistant material
•  Wide temperature range
•  Suitable for use in water based fluids
•  Most AS568 sizes available
•  Metric sizes available

Hallite also offers back ups in PTFE, polyurethane, and 90 IRHD nitrile rubber. Polyester backup rings are available coloured orange as standard. Other colours are available on request. Please contact your local Hallite sales office for further information.

  • Unit of measurement:
Unit of measurement:

Temp range

  • Recomended
  • Possible
  • Not Suitable

* For fluid types marked as possible, please call our team of experts on +1 248 668 5220 to talk through your requirements and determine if this seal is the most suitable for your needs.

  Dynamic application Static application
Fluids based on mineral oil    
Any Not suitable Recommended
Waterbased fluids    
HFA (5/95) Not suitable Possible
HFB (60/40 invert emulsion) Not suitable Possible
HFC (water glycol) Not suitable Not suitable
Water Not suitable Possible
Other fluid types    
Air/Nitrogen Not suitable Not suitable
HFD (Phosphate ester ARYL Type) Not suitable Not suitable
Synthetic esters (HEES, HFDU) Not suitable Recommended