Characteristics and performance
The Hallite 839N double-lipped, snap-in wiper is designed to fit popular Asian housing sizes, and to exclude dirt and moisture from entering the cylinder. The design minimises the oil transfer out of the ram on the cylinder rod by collecting traces of fluid passing the rod seal.
The wiping lip on the Hallite 839N is textured to provide improved dry rod performance, particularly for long stroking cylinder applications. Opposite the wiper lip are two sealing lips that are precision trimmed at an angle to give optimal rod sealing performance. The Hallite 839N is designed to have an interference in the seal housing groove to improve the stability of the wiper in the gland and to reduce the possibility of ingress around the outside of the wiper.
Hallite recommends a vent is provided between the seal and the wiper to avoid a pressure trap.
Product details
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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 +49 (0)40 73 47 48-0 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 | Possible |
| Waterbased fluids | ||
| HFA (5/95) | Possible | Possible |
| HFB (60/40 invert emulsion) | Possible | Possible |
| HFC (water glycol) | Possible | Possible |
| Water | Possible | Possible |
| Other fluid types | ||
| Air/Nitrogen | Recommended | Possible |
| HFD (Phosphate ester ARYL Type) | Not suitable | Not suitable |
| Synthetic esters (HEES, HFDU) | Recommended | Possible |
