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, no interference on the ID or OD.
- Preload effected through round Helicoil-spring which ensures high pressure on the sealing edges.
- Excellent static and dynamic sealing performance.
- Excellent sealing performance in low and high pressure ranges.
- Useable for short and long stroke lengths.
- Low friction in dry running or poor lubrication conditions.
- Also used for gas applications.
- Negligible tendency to “stick-slip” effect, small break away loads.
Application
Reciprocating and swivelling pistons in hydraulic cylinders, plungers. Chemical and pharmaceutical industry, aggressive fluids and high temp. Max. pressure 160 bar, max. speed 5 m/s linear; 0,1m/s rotating.
Installation
Installation in open housing, snap-in installation possible in special designed housings.
surface quality
| surface roughness |
Rtmax (μm) |
Ra (μm) |
| sliding surface | ≤2,5 | ≤ 0.6 |
| bottom of groove | ≤6,3 | ≤1,6 |
| groove face | ≤15 | ≤ 4.0 |
tolerance recommendation
| seal housing | tolerances |
| Ød | f7 |
| ØD | H11 |