Characteristics and performance

The Hallite 660 single-acting rod buffer seal is designed to be used in conjunction with high-performance rod seal, such as the Hallite 605, 663, or 673, to protect the primary seal from shock pressure loading and high frequency pressure spikes in the hydraulic system. The design allows oil to pass through to the rod seal while holding back pressure spikes and also allows pressure to pass back into the system preventing a pressure trap between the rod seal and the buffer seal.

The Hallite 660 is moulded in Hythane® 181, Hallite’s high-performance polyurethane, for easy installation and excellent low temperature performance. The design also incorporates a polyacetal anti-extrusion ring to provide maximum extrusion resistance against shock pressure loads.

Product details

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Max pressure *

700 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 +1 248-668-5200 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  
HFD (Phosphate ester ARYL Type)Not suitableNot suitable
Synthetic esters (HEES, HFDU)RecommendedPossible