Piston Seal XSPS81B
Function:
Piston seals are designed to seal the pressurized hydraulic fluid against
the atmosphere or between two pressurized spaces.
Eigenschaften:- Asymmetrical, single acting piston seal, designed with interference
of the preload element on the ID and slight interference of the PTFE glide ring on the OD.
- High pressure force because of a machined rubber preload element.
- Less relative movement of the rubber part compared to an O-Ring
giving the seal a higher wear resistance. - Excellent sealing performance in low and high speeds.
- Suitable for positioning functions.
- Negligible tendency to “stick-slip” effect, good sliding properties.
- Low break-away load after long standstills.
- Excellent gap extrusion resistance.
- Can be used in grooves where no O-Ring is possible.
|
Max. allowable gaps (PTFE Compounds):Profile dimension | 16 MPa | 26 MPa | 32 MPa | 40 MPa |
---|
10,0 mm | 0,60 mm | 0,50 mm | 0,40 mm | 0,40 mm | >12,5 mm ... ≤17,5 mm | 0,75 mm | 0,65 mm | 0,55 mm | 0,55 mm | 20,0 mm | 0,80 mm | 0,70 mm | 0,60 mm | 0,55 mm |
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Seal housing recommendation:
Tolerances | [mm]  |   |
---|
L < 10 mm
| + 0,2 | |
L ≥ 10 mm
| + 0,3 | |
∅ NA
| H8 | |
∅ NI
| h8 | |
|
---|
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 |
Installation:
Snap-in installation.
Attention: PTFE glide rings need calibration after installation!