IEEE Std 841 NEMA Premium® Efficiency Motors with Inpro/Seal


This brochure highlights WEG’s IEEE Std 841 motors, designed for severe-duty applications such as pulp and paper mills, petrochemical plants, and steel mills. Built on the W22 cast iron platform with Inpro/Seal bearing isolators, these motors deliver long-lasting performance, improved cooling, reduced vibration, and compliance with IEEE 841 standards.

Key Points

  • Built to IEEE Std 841 specifications for severe-duty, long-life performance.
  • W22 cast iron platform ensures improved cooling and vibration reduction.
  • Features include Class F insulation, epoxy paint system, regreasable bearings, and non-sparking fan.
  • Bearing life of 50,000 hours (L-10) and service factor of 1.25 up to 100 HP.
  • NEMA Premium® efficiency for reduced energy costs and sustainability.
  • Equipped with Inpro/Seal bearing isolators on both ends for superior bearing protection.
  • Designed for demanding industries: pulp & paper, steel, and petrochemical.
  • Complies with hazardous location requirements (Class I, Div. 2, Groups A–D).