227 Series: Piston Seal U-Cup – Asymmetrical – AE Ring
The 227 Series is a heavy duty polyurethane piston seal with a U-cup design and active backup ring.
232 Series
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 Drawing
Material Ranges
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.
| Polyurethane H-PU / POM | MP30 |
| Polyurethane TPU / POM | MN30 |
Temperature Ranges
MP03
°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
0.5 m/s (1.6 ft/sec)
Pressure
400 bar (6000 psi)
Pressure
400 bar (6000 psi)
Designed for flexibility across materials, sizes, and performance requirements. Standard and custom diameters ensure optimal integration into your system.
Engineered Performance
Built to Perform
The 227 Series piston seal is typically used in heavy-duty applications, where pressure trapping, high pressure and large extrusion gaps exist.
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
- Steel and aluminum processing
- Mobile Hydraulics
- Hydraulic Cylinder Rebuild
- Agricultural Hydraulics
- Construction Equipment
