Download CAD files for our sealing solutions to streamline engineering and product design. Our technical drawings allow engineers to quickly integrate seal geometries into their assemblies.
View CAD File
206 Series: Piston Seal U-Cup – Symmetrical
The 206 Series Piston U-cup is a popular System Seals design used in standard duty applications.
206 Series
The 206 Series Symmetrical Piston U-cup seal is one of System Seals’ most popular designs used in standard-duty applications. Its symmetrical design ensures that the seal lip forces are equal for every cross-section and diameter. The 206 is widely used in standard to moderate-duty hydraulic applications. Manufactured in a variety of materials and sizes from 6 mm up to 2100 mm in standard and custom diameters.
Installation Drawing
Material Ranges
The 206 Series Symmetrical Piston U-cup seal features high-grade polyurethane. Standard materials are MP03 machined H-PU, available up to 2100 mm 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…+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)
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
water
+5…+50
water
+40…+120
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)
CAD Files
Engineered Performance
Built to Perform
The 206 Symmetrical Piston 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.
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
