Characteristics and performance
The Hallite 770 double-acting piston seal is a compact, low friction seal for light to medium-duty applications designed to fit standard inch O-ring housings.
Comprised of a tough, self-lubricated thermoplastic elastomeric face seal which is pre-loaded by a rectangular cross-section NBR expander, the standard material is only suitable for hydraulic mineral oil applications. Other material options are available for water-based (HFA and HFB) fluids and synthetic esters (HEES). For intermittent single-acting applications and in certain sizes, we recommend using Hythane® 181 for the face material.
Product details
For further details of bearing grooves, please refer to the appropriate product data sheet.
Ask an expert
* 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 +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 | Possible |
| HFB (60/40 invert emulsion) | Possible | Possible |
| HFC (water glycol) | Not suitable | Not suitable |
| Water | Possible | Possible |
| Other fluid types | ||
| Air/Nitrogen | Possible | Possible |
| HFD (Phosphate ester ARYL Type) | Not suitable | Not suitable |
| Synthetic esters (HEES, HFDU) | Recommended | Recommended |
