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106 Series: 106 Rod Seal U-Cup - Symmetrical
The 106 Series U-Cup is a popular System Seals design used in standard duty applications.
106 Series
The 106 Series U-Cup, due to its versatility as both a piston and rod seal, can be used in a wide variety of applications. Recommended where dynamic sealing action is required simultaneously on the inside and outside diameters. Examples are often encountered in specialty sensors, bolt tension equipment and hollow cylinders.
Installation Drawing
Material Ranges
The 106 Series rod seal features high-grade polyurethane. Standard materials are MP03 machined H-PU, available up to 2100mm in diameter, MP50 and MN01 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 2100mm
Applications
- Mobile Hydraulics
- Hydraulic Cylinder Rebuild
- Agricultural Hydraulics
- Construction Equipment
- Hydraulic Presses
- Injection Molding Machines
