Heavy-Duty Rotary Seal

Series 441: Heavy-Duty Rotary Seal

The 441 Series Rotary Seal is a popular seal used in low-to-moderate speed applications that require maximum reliability and long service life. The unique encapsulated spring ensures that the spring remains in place during a blind installation. The main body is strong yet flexible for ease of installation and stability within the groove. The lip force is optimized for the full range of sizes by varying designs of the internal spring, allowing low friction and minimal wear.



Available split design

Fully encapsulated spring option

Premium wear resistance

Low friction

Recommended for low-to-moderate speed applications

Easy to install

Large diameter applications


The 441 Series Rotary Seal is used in industrial rotary applications that require minimum wear and long service life.

Typical Applications

  • Wind Energy
  • Large Diameter Bearing Manufacturers

The 441 Series Rotary Seal features high-grade polyurethane.

Material Code
Polyurethane / garter spring MP94
Temperature MP85 Seal Only

hydraulic oil -30…+100 -22…+212
water oil emulsions (HFA) +5…+60 +41…+140
water-glycol fluids (HFC) -30…+60 -22…+140
polyol esters (HFD) -30…+80 -22…+176
water 0…+50 +41…+212
Speed 10 m/s (32 ft/sec)
Pressure 0.05 MPa(7.25 psi)

Note: for other materials or fluids please contact our engineering department.