Back-up Ring XSBUR13
Function:
Back-up rings or Anti Extrusion Rings do not have a sealing function. They are designed to prevent elastic sealing elements of gap extrusion.
Features:- Triangular Anti Extrusion Ring for Piston applications.
- Special housing designs required.
- Reduced gap extrusion of the elastomer seal and/or higher pressures up to 700 bar possible.
- Available as split and non-split version.
|
Seal housing recommandation
Tolerances | [mm]  |   |
---|
L < 10 mm
| + 0,2 | |
L ≥ 10 mm
| + 0,3 | |
∅ NA
| H9 | |
∅ NI
| h10 | |
|
---|
Surface roughness | Rtmax [ µ]  | Ra [ µ]  |
---|
Bottom of groove
| ≤ 6,3 | ≤ 1,6 |
Face of groove
| ≤ 15 | ≤ 3 |
|
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Sliding surface | Rtmax [ µ]  | Ra [ µ]  |
---|
PU, elastormeres
| ≤ 2,5 | ≤ 0,1 - 0,5 |
PTFE
| ≤ 2 | ≤ 0,05 - 0,3 |