High-Speed Rotary Seal

Series 442: High-Speed Rotary Seal

The 442 Series High Speed Rotary Seal is a premium seal that offers a significant advantage over traditional rubber-and-textile rotary seals through its highly flexible, dual-construction internal metal spring and seal lip. The high flexibility of the seal lip and spring combination allows for use in applications with large deflections or very high speeds. The seal body has an internal reinforcing metal ring that ensures high retention during installation.


View the installation video here: System Seals 442 Rotary Seal Installation



Optimal seal life through consistent lip force through the range of available sizes

One-piece molding lip design

High-retention, press-fit installation design

Works in a wide range of temperatures

Excellent fluid compatibility

Exceptional abrasion resistance

Available in diameters up to 2100 mm


The 442 Series Rotary Seal is used in industrial rotary applications with large deflections or very high speeds.

Typical Applications

  • Steel and Aluminum Processing
  • Pulp and Paper
  • Pumps and Gear Boxes
  • Electrical generation
  • Wind Energy
  • Bearing Manufacturers


The 442 Series Rotary Seal is commonly available in both high-grade NBR compound and a high-temperature FPM compound. For extremely low temperatures, the seal can be supplied in silicone. The internal springs are constructed from 316 stainless steel.

Material Code
Nitrile rubber NBR + steel MN40
Fluoroelastomer FPM +steel MF30
Temperature NBR/metal MN40

NBR -20…+120 -4…+248
FPM +20…+220 +4…+428
Silicone -60…+180 -76…+428
Max Speed 35 m/s (115 ft/sec)
Max. Misalignment 2.5mm
Shaft Hardness >50 HRC

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