Mill-Duty Rotary Splash Guard

Series 421: Mill-Duty Rotary Splash Guard

The 421 Series Mill-Duty Rotary Splash Guard is a robust rotary seal that is designed to protect the internal bearing and primary seals from water splash and heavy concentrations of debris. This is commonly used on work rolls and roll neck bearings in steel and aluminum mills. The design of the seal lip is much more robust than traditional rotary face seals providing maximum performance in harsh conditions.



Lip force is optimized for maximum exclusion

Works in a wide range of temperatures

Excellent fluid compatibility

Exceptional abrasion resistance

Available in diameters up to 2100 mm


The 421 Mill-Duty Rotary Splash Guard is commonly used in mill duty applications for maximum exclusions resistance where water splash and heavy concentrations of debris are present.

Typical applications include:

  • Steel and Aluminum Processing
  • Pulp and Paper
  • Pumps and Gear Boxes
  • Marine
  • Wind Energy
  • Bearing Manufacturers
  • Oil and Gas

The 421 Series Mill-Duty Rotary Splash Guard features high-grade NBR. Also available in HNBR for improved abrasion resistance and FPM compounds for higher temperatures.

Material Code
Nitrile NBR MN01
Hydrogenated HNBR MN03
Fluroelastomer FPM MF01
Temperature MN01

hydraulic oil -30…+100 -22…+212
water oil emulsions (HFA) +5…+60 +41…+140
water-glycol fl uids (HFC) -30…+60 -22….+140
polyol esters (HFD) -30…+80 -22…+176
water +5…+100 +41…+212
Speed 20m/s (65ft/sec)
Pressure 0.03 MPa (4.35 psi)

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