The Hallite 730 double-acting piston seal in a four part assembly is designed for use in heavy-duty applications where position holding ability is important, such as longwall mining roof support applications using water-based fluids and large diameter crane cylinders using standard hydraulic oils.

The Hallite 730 is comprised of a tough, wear resistant thermoplastic polyester elastomer (TPE) face seal pre-loaded by a profiled nitrile rubber energiser. The Hallite 730 design also contains a pair of rectangular polyacetal anti-extrusion rings.

The standard TPE face material is suitable for both roller-burnished and honed tubing. While rarely used in alternate material, the face material can be provided in a number of material options including lubricated polyester and PTFE.

For your reference, we have included an installation guide for the Hallite 730 double-acting piston seal which you can find after the part number range pages of this data sheet.

  • Unit of measurement:
Unit of measurement:

Max pressure

700 Bar

Temp range


Max speed

  • 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 application Static application
Fluids based on mineral oil    
Any Recommended No data found
Waterbased fluids    
HFA (5/95) Recommended No data found
HFB (60/40 invert emulsion) Recommended No data found
HFC (water glycol) Recommended No data found
Water Recommended No data found
Other fluid types    
Air/Nitrogen Recommended No data found
HFD (Phosphate ester ARYL Type) Recommended No data found
Synthetic esters (HEES, HFDU) Recommended No data found