The Hallite GPS is a double-acting piston seal utilizing Hallite’s high-performance Armorlene® HLX PTFE paired with an elastomer energizer and x-ring for optimum performance and durability. The Armorlene® PTFE seal ring and the x-ring together provides the dynamic sealing function, while the elastomeric energizer provides the static sealing. The standard GPS seal face includes pressure notches, which makes the seal very responsive to changes in pressure or direction of travel.

Hallite GPS seals are especially effective in applications where two different types of media need to be separated such as in piston accumulators, intensifiers, and position-holding applications. This makes this seal a good choice for applications such as stabilizers, accumulators, manlifts, and industrial presses. Designed for basic grooves, the GPS seal fits the same ISO 7425-1 housing as the Hallite P16 and P54 series.

The part numbers listed below only show standard material options for both the face seal and energizer, where applicable. For a complete list of the material and energizer options along with part numbering structure, please see the complete PDF datasheet or click GPS Data Tables.
  • Unit of measurement:
Unit of measurement:

Max pressure

500 Bar

Temp range


Max speed

  • Recomended
  • Possible
  • Not Suitable

* For fluid types marked as possible, please call our team of experts on +44 208 941 2244 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 Recommended Recommended
Waterbased fluids    
HFA (5/95) Possible Recommended
HFB (60/40 invert emulsion) Possible Recommended
HFC (water glycol) Recommended Recommended
Water Possible Recommended
Other fluid types    
Air/Nitrogen Possible Possible
HFD (Phosphate ester ARYL Type) Not suitable Not suitable
Synthetic esters (HEES, HFDU) Recommended Recommended