Characteristics and performance

The Hallite 667 polyurethane, single-acting piston seal for pneumatic applications design incorporates buffers to provide additional cushioning for pneumatic cylinders to prevent metal-to-metal contact at the end of the stroke, particularly if the retardation of the piston by the pneumatic cushion is insufficient. In turn, this additional buffering will reduce end stroke noise.

Manufactured in Hythane® 181, Hallite’s high-performance polyurethane, the Hallite 667 is easy to install with excellent low temperature performance and long service life.

The material combined with the design of the dynamic sealing lip offers low friction, significantly less than that of a rubber seal, and an ultra-long life.

Product details

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Max pressure *

16 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 (02) 8886 1600 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  
AnyNot suitableNot suitable
Waterbased fluids  
HFA (5/95)Not suitableNot suitable
HFB (60/40 invert emulsion)Not suitableNot suitable
HFC (water glycol)Not suitableNot suitable
Other fluid types  
HFD (Phosphate ester ARYL Type)Not suitableNot suitable
Synthetic esters (HEES, HFDU)Not suitableNot suitable