A medium to heavy duty single acting seal, the Hallite 18 has shown itself over the years to be an effective and robust seal in a wide variety of applications.

The seal comprises 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.

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.

  • 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 +39 (0)58 642 8287 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) Recommended 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) Possible Possible