UNP187-1375-250-H9JSingle-acting polyurethane piston U-cup seal
UNP seals are single-acting U-cup seals made of thermoplastic polyurethane. They may be used in double-acting cylinders when using two seals in a back-to-back arrangement.
Dimensions
| D |
44.45 mm
|
Cylinder bore diameter |
|---|---|---|
| d |
34.93 mm
|
Piston groove diameter |
| L |
6.99 mm
|
Piston groove width |
| L+H |
9.37 mm
|
Additional groove width |
| H |
6.35 mm
|
Nominal seal width |
| S |
4.75 mm
|
Radial depth |
| R |
max. 0.38 mm
|
Groove radius |
| C |
min. 6.35 mm
|
Lead-in chamfer length |
| tol D |
0.05 mm
|
Upper limit deviation |
|---|---|---|
|
0 mm
|
Lower limit deviation | |
| tol d |
0 mm
|
Upper limit deviation |
|
-0.05 mm
|
Lower limit deviation | |
| tol L |
0.254 mm
|
Upper limit deviation |
|
0 mm
|
Lower limit deviation | |
| tol L+B |
0.254 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 |
0.36 mm
|
| Extrusion gap at 250 bar | e |
0.2 mm
|
Pressure and speed
| Pressure |
max. 350 bar
|
| Speed at pressure ≤ 250 bar |
1 m/s
|
| Speed at pressure ≤ 350 bar |
0.5 m/s
|
Operating temperature
| T6 |
max. 130 °C
|
Extreme upper temperature limit |
|---|---|---|
| T5 |
max. 120 °C
|
Reduced performance upper temperature limit |
| T4 |
max. 110 °C
|
Upper operating temperature limit |
| T3 |
min. -30 °C
|
Lower operating temperature limit |
| T2 |
min. -40 °C
|
Reduced performance lower temperature limit |
| T1 |
min. -60 °C
|
Extreme lower temperature limit |
|
Maximum values of application parameters (e.g. pressure, speed, temperature, e-gap) should not be applied continuously nor simultaneously.
|
||
Materials
| Primary sealing element |
Polyurethane (TPU U-1023)
|
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