GH2D-8250-AD1Piston seal with PTFE slide ring and O-ring energizer
GH seals are double-acting piston seals with a PTFE slide ring and a nitrile rubber O-ring energizer. Rectangular energizers are available on request.
Dimensions
| D |
209.55 mm
|
Cylinder bore diameter |
|---|---|---|
| d |
196.39 mm
|
Piston groove diameter |
| L |
4.04 mm
|
Piston groove width |
| S |
6.58 mm
|
Radial depth |
| R |
max. 0.38 mm
|
Groove radius |
| C |
min. 3.56 mm
|
Lead-in chamfer length |
| tol D |
0.1 mm
|
Upper limit deviation |
|---|---|---|
|
0 mm
|
Lower limit deviation | |
| tol d |
0.1 mm
|
Upper limit deviation |
|
-0.1 mm
|
Lower limit deviation | |
| tol L |
0.051 mm
|
Upper limit deviation |
|
-0.051 mm
|
Lower limit deviation |
Maximum extrusion gap
| Reference temperature for extrusion gap |
80 °C
|
|
| Extrusion gap at 160 bar | e |
0.46 mm
|
| Extrusion gap at 250 bar | e |
0.33 mm
|
| Extrusion gap at 400 bar | e |
0.23 mm
|
Pressure and speed
| Pressure |
max. 400 bar
|
| Speed |
max. 5 m/s
|
Operating temperature
| T6 |
max. 130 °C
|
Extreme upper temperature limit |
|---|---|---|
| T5 |
max. 110 °C
|
Reduced performance upper temperature limit |
| T4 |
max. 100 °C
|
Upper operating temperature limit |
| T3 |
min. -20 °C
|
Lower operating temperature limit |
| T2 |
min. -30 °C
|
Reduced performance lower temperature limit |
| T1 |
min. -40 °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 |
Polytetrafluoroethylene (PTFE 741)
|
| Additional element |
Nitrile Rubber (NBR A-8501)
|
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