Medium Pressure Backward Curved Centrifugal Fans

Axair’s supply partner, Casals, has developed a range of powerful medium pressure backward curved centrifugal fans for universal use in medium pressure applications.


With air flows of up to 88,000m³ per hour, NIMUS and NIMAX fans offer the most complete range on the market. There are almost 100 standard types available with impeller sizes between 311mm and 1402mm. Motor sizes range from 0.37kW to 110kW with 2, 4, 6 and 8 pole options available. This allows the range to provide solutions for a wide scope of air flow and pressure requirements.

The NIMUS and NIMAX ranges are available in an ATEX certified version on request. (Read our guide to ATEX fans here.)

Scroll down to request a quote.


  • Medium pressure backward curved centrifugal fans with direct coupling.
  • Reinforced housing made of carbon laminated steel, protected against corrosion by powder coating polyester resin RAL 5010. Finish C3.
  • Casing fully latched and adjustable.
  • Self-cleaning turbine and reinforced impeller with high-performance backward (reaction) blades made of carbon laminated steel dynamically balanced to minimise noise and vibrations. Black painted RAL 9005
NIMAX NIMUS Medium Pressure Centrifugal Fan


Suitable for moving clean or dusty air. Designed to be installed in conduit for suction or impulsion. Typical applications of the NIMUS / NIMAX range of medium pressure centrifugal fans include:

  •      Paint booths
  •      Collection of dust
  •      Food industry dryers
  •      Food processing
  •      Incineration
  •      Odor control in industry
  •      Indoor / outdoor pollution control
  •      Big buildings
  •      Malls
  •      Factories / Industrial buildings
  •      Warehouses
  •      Extraction of smoke
  •      Boilers and ovens
  •      Manufacture and treatment of chemical products
  •      Tunnels, underground stations

Available on Request

  • Fans for 60Hz and special voltages
  • 2 speed motor
  • C4 or C5 coating painting
  • Hot dip galvanised
  • Inox 304 (normal or electropolished finish)
  • Inox 316 (normal or electropolished finish)
  • Cooling wheel
  • Anticaloric paint
  • Fully welded housing (waterproof)
  • Inspection door to facilitate maintenance and cleaning
  • Drain plug
  • Airtight axle
  • Non-sparking air passage and standard motor
    – ATEX II2GD Ex_d
    – ATEX II2G Ex_e
    – ATEX II3GD Ex_na
  • Other brands of motors

Medium Pressure Centrifugal NIMUS / NIMAX Fans

For more information on the range, request a quote in the table below and one of our sales engineers will be in contact. Alternatively, call 01782 349 430.

Fan ModelAir Flow (m³/h)Pressure (Pa)Motor Size (kW)PoleRequest a Quote
NIMUS470 - 79,370470 - 3,3500.37 - 1102, 4, 6 or 8
NIMAX530 - 88,000490 - 3,3500.37 - 1102, 4, 6 or 8