SIL 70X80X12.5Hydraulic rod bump-heel U-cup seal
These hydraulic rod seals are of an unloaded U-cup design with a secondary dynamic sealing lip. They are made of an ether-based thermoplastic polyurethane, provide good resistance to hydrolysis (attack from moisture) and have good low temperature resistance.
Dimensions
| d |
70 mm
|
Rod diameter |
|---|---|---|
| D |
80 mm
|
Housing groove diameter |
| L |
12.5 mm
|
Housing groove width |
| S |
5 mm
|
Radial depth |
| R |
max. 0.3 mm
|
Groove radius |
| C |
min. 2.5 mm
|
Lead-in chamfer length |
| tol d |
-0.03 mm
|
Upper limit deviation |
|---|---|---|
|
-0.076 mm
|
Lower limit deviation | |
|
f8
|
Tolerance class for rod diameter | |
|
h9
|
Alternative tolerance class for rod diameter | |
| tol D |
0.12 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation | |
|
H10
|
Tolerance class for housing groove diameter | |
| tol L |
0.2 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation |
Maximum extrusion gap
| Reference temperature for extrusion gap |
60 °C
|
|
| Extrusion gap at 160 bar | e |
0.45 mm
|
| Extrusion gap at 250 bar | e |
0.25 mm
|
| Extrusion gap at 350 bar | e |
0.1 mm
|
Pressure and speed
| Pressure |
max. 350 bar
|
| Speed |
max. 0.5 m/s
|
Operating temperature
| T6 |
110 °C
|
Extreme upper temperature limit |
|---|---|---|
| T4 |
100 °C
|
Upper operating temperature limit |
| T3 |
-40 °C
|
Lower operating temperature limit |
| T2 |
-50 °C
|
Reduced performance lower temperature limit |
| T1 |
-60 °C
|
Extreme lower temperature limit |
|
Maximum values of application parameters (e.g. pressure, speed, temperature) should not be applied continuously nor simultaneously.
|
||
Materials
| Primary sealing element |
B93
|
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