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101 Series: Rod Seal
The 101 Series Rod U-Cup seal is one of System Seals’ most popular designs used in standard-duty applications.
101 Series
The 101 Series U-Cup is one of the most versatile seals typically used as a primary seal in moderate to high-pressure applications. In applications requiring Zero-Leak Technology, it is often used as a secondary seal with the 124 Series buffer seal.
Installation Drawing
Material Ranges
The 101 Series rod seal features high-grade polyurethane. Standard materials are MP03 machined H-PU, available up to 2100mm 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° + 150°
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°
Polyol esters (HFD)
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Polyol esters (HFD)
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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°
Polyol esters (HFD)
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Polyol esters (HFD)
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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 5000 millimeters
Applications
- Mobile Hydraulics
- Hydraulic Cylinder Rebuild
- Agricultural Hydraulics
- Construction Equipment
- Hydraulic Presses
- Injection Molding Machines
