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.
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
The 227 Series piston seal is typically used in heavy-duty applications, where pressure trapping, high pressure and large extrusion gaps exist.
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|
|water oil emulsions (HFA)||+5…+55||+40…+130|
|water-glycol fl uids (HFC)||-20…+55||-5….+130|
|polyol esters (HFD)||-||-|
|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.