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122 Series: Rod Seal
The 122 Series U-Cup is used in applications requiring high sealing and wiping forces.
122 Series
The 122 Series U-Cup is used in applications requiring high sealing and wiping forces. This seal is available in a wide range of materials to cover applications where specialty fluids are present. The seal is a symmetrical design allowing use as either dynamic OD or ID sealing. Generally the seal has been superseded by more advanced designs and it is recommended to consult with engineering to avail of more modern designs.
Installation Drawing
Material Ranges
The 122 Series rod seal features high-grade polyurethane. Standard materials are MP03 machined H-PU, available up to 2100 mm in diameter, and MP50 injection-molded TPU. To suit a variety of applications, the series is also available in NBR, H-NBR, EPDM and high temperature-resistant FPM.
| Polyurethane H-PU | MP03 |
| Polyurethane TPU | MP50 |
Temperature Ranges
MP03
MP50
°C
°F
Hydraulic oil
-20° + 115°
Hydraulic oil
-5° + 240°
Water oil emulsions (HFA)
+5° + 55°
Water oil emulsions (HFA)
+40° + 130°
Water-glycol fluids (HFC)
-20° + 55°
Water-glycol fluids (HFC)
-5° + 130°
Water
+5° + 55°
Water
+40° + 130°
Speed
0.5 m/s (1.6 ft/sec)
Speed
Pressure
400 bar (6000 psi)
Pressure
Hydraulic oil
-30° + 110°
Hydraulic oil
-20° + 230°
Water oil emulsions (HFA)
+5° + 50°
Water oil emulsions (HFA)
+40° + 120°
Water-glycol fluids (HFC)
-30° + 40°
Water-glycol fluids (HFC)
-20° + 100°
Water
+5° + 50°
Water
+40° + 120°
CAD Files
Engineered Performance
Built to Perform
Engineered for demanding hydraulic environments, this sealing solution delivers reliable performance under high pressure, wide temperature ranges, and aggressive media—helping extend service life and reduce downtime.
Benefits
- High pressure capability and wide temperature range
- Excellent fluid compatibility including water-based fluids (H-PU)
- Exceptional abrasion resistance
- Highly extrusion resistant
- Available in diameters up to 2100 mm
Applications
- Mobile Hydraulics
- Hydraulic Cylinder Rebuild
- Agricultural Hydraulics
- Construction Equipment
- Hydraulic Presses
- Injection Molding Machines
