Characteristics and performance

The Hallite PFR is a chamfered, double-acting piston seal that performs well in both high- and low-pressure systems. The PFR has chamfers on the primary sealing face paired with either a square or an o-ring elastomer energizer. Typically, the square energizer is preferred for heavy-duty applications, as it provides superior interference and stability in the groove. High-performance Armorlene® materials, like HLX, provide outstanding wear and extrusion-resistance properties as well as large range of temperature and media compatibility.

Hallite recommends proper guidance (see Hallite Bearings section) be used with this seal in heavy-duty applications.

Product details

This seal is designed to fit the ANSI B93.32-1973 and NFPA T3.19.18 housing size.

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 PFR Data Tables.
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Max pressure *

350 Bar

Temp range


Max speed


* Max pressure stated is dependant on the material variant selected. Please consult the datasheet for further information.

  • Recomended
  • Possible
  • Not suitable

* For fluid types marked as possible, please call our team of experts on +86 (0)21 3351 7272 to talk through your requirements and determine if this seal is the most suitable for your needs.

 Dynamic applicationStatic application
Fluids based on mineral oil  
Waterbased fluids  
HFA (5/95)PossiblePossible
HFB (60/40 invert emulsion)PossiblePossible
HFC (water glycol)PossiblePossible
Other fluid types  
Air/NitrogenPossibleNot suitable
HFD (Phosphate ester ARYL Type)Not suitableNot suitable
Synthetic esters (HEES, HFDU)RecommendedPossible