Symmetrical Seal XSPRS25-27
Function:
Symmetrical piston/rod seals are designed to seal the pressurized hydraulic fluid against the atmosphere or between two pressurized spaces.
Features:- Symmetrical, single acting piston/rod seal, combined with pressure ring and supporting ring.
- Special lip geometry for packings out of PTFE or other non elastic materials.
- By adjusting the number of packings friction and leakage characteristics can be influenced.
- Designed for low pressure ranges up to 100 bar.
- Excellent static and dynamic sealing performance.
- Useable for short and long stroke lengths.
- High wear resistance.
|
Seal housing recommandation
Tolerances | [mm]  |   |
---|
L < 10 mm
| + 0,2 | |
L ≥ 10 mm
| + 0,3 | |
∅ NA (rod groove)
| H 10 | |
∅ NI (rod diam.)
| f 8 | |
∅ NA (cylinder diam.)
| H 9 | |
∅ NI (piston groove)
| h 10 | |
|
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Surface roughness | Rtmax [ µ]  | Ra [ µ]  |
---|
Bottom of groove
| ≤ 6,3 | ≤ 1,6 |
Face of groove
| ≤ 15 | ≤ 3 |
|
---|
Sliding surface | Rtmax [ µ]  | Ra [ µ]  |
---|
PU, elastormeres
| ≤ 2,5 | ≤ 0,1 - 0,5 |
PTFE
| ≤ 2 | ≤ 0,05 - 0,3 |
Installation
Open housings are recommended.
The axial contact force on the individial parts usually is generated by a spring element.