Characteristics and performance
The Hallite 775 double-acting piston seal is a compact seal for light to medium-duty applications and designed to fit two housing standards; one for standard O-ring grooves, the second for grooves designed for an O-ring and two back-up rings. The advanced face geometry gives the Hallite 775 single-acting capabilities making it an excellent choice for double-acting applications where minimal dynamic leakage is required.
Comprised of a tough polyurethane face seal which is pre-loaded by a rectangular cross-section NBR expander, the standard material is suitable for hydraulic mineral oil applications.
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Max pressure *
* Max pressure stated is dependant on the material variant selected. Please consult the datasheet for further information.
- Not suitable
* For fluid types marked as possible, please call our team of experts on +86 (0)21 3351 7272 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|
|HFA (5/95)||Not suitable||Not suitable|
|HFB (60/40 invert emulsion)||Not suitable||Not suitable|
|HFC (water glycol)||Not suitable||Not suitable|
|Water||Not suitable||Not suitable|
|Other fluid types|
|HFD (Phosphate ester ARYL Type)||Not suitable||Not suitable|
|Synthetic esters (HEES, HFDU)||Recommended||Recommended|