Heavy-Duty Piston U-Cup Seal with Active Backup Ring
Series 227: Heavy-Duty Piston U-Cup Seal with Active Backup Ring
The 227 Series is a heavy duty polyurethane piston seal with a U-cup design and active backup ring. This pressure-relieving design is ideal for back-to-back tandem arrangements. The active backup ring allows larger clearances and higher pressures. The asymmetrical design of the U-cup seal allows maximum stability in the seal groove. It is an ideal choice when pressure trapping is a problem.
Installation
Benefits
High pressure capability and wide temperature range
Pressure-relieving design prevents pressure trapping
Excellent fluid compatibility including water-based fluids (H-PU)
Exceptional abrasion resistance
Applications
The 227 Series piston seal is typically used in heavy-duty applications, where pressure trapping, high pressure and large extrusion gaps exist.
Typical Applications
- Steel and aluminum processing
- Mobile Hydraulics
- Hydraulic Cylinder Rebuild
- Agricultural Hydraulics
- Construction Equipment
The 227 Series piston seal features high-grade polyurethane. Standard materials are MP03 H-PU and polyacetal backup ring. 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 and PEEK.
| Material | Code |
|---|---|
| Polyurethane H-PU / POM | MP30 |
| Polyurethane TPU / POM | MN30 |
| Temperature | MP03 °C |
°F |
||
|---|---|---|---|---|
| hydraulic oil | -20…+115 | -5…+240 | ||
| water oil emulsions (HFA) | +5…+55 | +40…+130 | ||
| water-glycol fl uids (HFC) | -20…+55 | -5….+130 | ||
| polyol esters (HFD) | - | - | ||
| water | +5…+55 | +40…+130 | ||
| 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.
