RBB-60X75.1X6.3-J0SHydraulic buffer U-cup seal, with integrated anti-extrusion ring
These hydraulic buffer seals consist of a U-cup LUBRITHANE thermoplastic polyurethane sealing ring and an integrated polyamide anti-extrusion ring. They are designed to vent pressure back to the system side and can tolerate abrupt pressure peaks, while providing Increased resistance to deformation, wear, and gap extrusion.
Dimensions
| d |
60 mm
|
Rod diameter |
|---|---|---|
| D |
75.1 mm
|
Housing groove diameter |
| L |
6.3 mm
|
Housing groove width |
| S |
7.55 mm
|
Radial depth |
| R |
max. 0.7 mm
|
Groove radius |
| C |
min. 8 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 |
0.074 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation | |
|
H9
|
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 |
80 °C
|
|
| Extrusion gap at 160 bar | e |
0.8 mm
|
| Extrusion gap at 250 bar | e |
0.55 mm
|
| Extrusion gap at 400 bar | e |
0.35 mm
|
| Extrusion gap at 690 bar | e |
0.15 mm
|
Pressure and speed
| Pressure |
max. 690 bar
|
| Speed |
max. 1 m/s
|
Operating temperature
| T6 |
120 °C
|
Extreme upper temperature limit |
|---|---|---|
| T5 |
110 °C
|
Reduced performance upper temperature limit |
| T4 |
100 °C
|
Upper operating temperature limit |
| T3 |
-25 °C
|
Lower operating temperature limit |
| T2 |
-30 °C
|
Reduced performance lower temperature limit |
| T1 |
-40 °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 |
Polyurethane (TPU U-1029)
|
| Additional element |
Acetal (POM P-2518)
|
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