MPV-70X59X4.2Heavy duty rubber-energized polyurethane piston seal
MPV seals are metric sized, double-acting piston seals with a polyurethane slide ring and a rectangular nitrile rubber energizer. The wear-resistant slide ring has a profiled sealing surface, optimized to reduce friction and resist gap extrusion. Notches in the slide ring edges enable rapid pressurization of the seal to react quickly to changes in pressure and direction. These profiles can usually be installed without special equipment.
Dimensions
| D |
70 mm
|
Cylinder bore diameter |
|---|---|---|
| d |
59 mm
|
Piston groove diameter |
| L |
4.2 mm
|
Piston groove width |
| S |
5.5 mm
|
Radial depth |
| R |
max. 0.5 mm
|
Groove radius |
| C |
min. 4.5 mm
|
Lead-in chamfer length |
| tol D |
0.074 mm
|
Upper limit deviation |
|---|---|---|
|
0 mm
|
Lower limit deviation | |
|
H9
|
Tolerance class for cylinder bore diameter | |
| tol d |
0 mm
|
Upper limit deviation |
|
-0.074 mm
|
Lower limit deviation | |
|
h9
|
Tolerance class for piston 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 |
0.5 mm
|
| Extrusion gap at 250 bar | e |
0.4 mm
|
| Extrusion gap at 400 bar | e |
0.3 mm
|
Pressure and speed
| Pressure |
max. 400 bar
|
| Speed |
max. 1 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. -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 |
Polyurethane (X-ECOPUR PS)
|
| Additional element |
Nitrile Rubber (NBR N80/198)
|
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