Rod U-Cup Seal with Integrated Backup Ring
Series 139: Rod U-Cup Seal with Integrated Backup Ring
The 139 Series U-cup seal is a high-performance U-cup seal for use in high-clearance applications, typically in moderate to high-pressure environments. Its asymmetrical design ensures that the seal lip forces are optimized for every cross section and diameter. The integrated backup ring supports the seal and ensures maximum extrusion resistance in a larger than normal clearance application. Manufactured in a variety of materials and sizes from 6 mm to 2100 mm in diameter in standard or custom sizes.
Installation
Benefits
Designed specifically for large clearance applications
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
The 139 Series U-cup seal is typically used in high-clearance applications as a primary seal and functions well in moderate to high pressures.
Typical Applications
- Forging and extrusion presses
- Stamping presses
- Mining
- Agriculture
- Construction equipment
- Injection molding machines
The 139 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. The backup ring materials include POM, Polyamide and PEEK.
| Material | Code |
|---|---|
| Polyurethane H-PU | MP03 |
| Polyurethane TPU | MP50 |
| Temperature | MP03 °C |
°F |
MP50 °C |
°F |
|---|---|---|---|---|
| hydraulic oil | -20…+115 | -5…+240 | -30…+110 | -20…+230 |
| water oil emulsions (HFA) | +5…+55 | +40…+130 | +5…+50 | +40…+120 |
| water-glycol fl uids (HFC) | -20…+55 | -5….+130 | -30…+40 | -20…+100 |
| polyol esters (HFD) | - | - | - | - |
| water | +5…+55 | +40…+130 | +5…+50 | +40…+120 |
| Speed | 0.5 m/s (1.6 ft/sec) | |||
| Pressure | 400 bar (6000 psi) | |||
Note: for other materials or fluids please contact our engineering department.
