Characteristics and performance

Over the years the Hallite 18 has shown itself to be an effective and robust seal in a wide variety of applications. Comprising a rubberised fabric U form base to which is bonded a rubber energiser, the seal section is pre-loaded by the housing when installed to ensure effective sealing at low pressure. When the pressure increases the rubber energises the U form to increase the sealing area and hence the efficiency of the seal. The strength and durability of the rubberised fabric combines with its ability to retain lubricant keeping friction and wear to a minimum.

Product details

In a piston application the Hallite 18 should not be used back to back to make a double acting assembly.

NB:  Size lists give “on line” tolerances for rod applications.

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Max pressure *

500 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 +44 208 941 2244 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)PossibleRecommended
HFB (60/40 invert emulsion)RecommendedRecommended
HFC (water glycol)RecommendedRecommended
Other fluid types  
HFD (Phosphate ester ARYL Type)Not suitableNot suitable
Synthetic esters (HEES, HFDU)PossiblePossible