Howden Axial Fans
Howden JM aerofoil fans

Available in both tube axial and vane axial designs

AMCA certified for air performance on direct drive fans

Available in direct driven and belt driven configurations

Impeller type: Adjustable pitch (at rest) cast aluminum

Compact, low cost, high efficiency, rugged design

Available in twenty-one basic fan sizes

Smoke exhaust applications

Customized options available

CARACTÉRISTIQUES

• Motors
  Motors are cast iron, pad mounted design suitable for horizontal through vertical operation. Motors are 3 phase premium efficiency totally enclosed air over design with 1.15 service factor. Standard efficiency motors are also available. All efficiency testing and labelling is done in accordance with NEMA MG1-12.53 standard. Class F insulation with Class B rise is standard. Bearings are anti-friction grease lubricated ball or roller with 30,000 hour L-10 life minimum.
  
  
• Electrical Supply and Starting
  Standard motors are 3 phase/60 Hz/460V.Other voltages, 50 Hz, and 1 phase are also available. Motors are available for across-the line, Wye-Delta, Part Winding, or Autotransformer starting.
  
  
• Impellers
  JM Aerofoil impellers have a unique aerodynamic blade section to optimise efficiency and performance while minimizing the noise. The think sections obtained by high pressure die cast technique promote efficiency, strength and lower weight. Impellers are comprised of high pressure die cast aluminium blades, hub and clamp plate with fully adjustable pitch angle. All impeller components are X-ray examined to ASTM E-155 prior to machining to assure premium quality. Impellers are precision balanced as a component and fan assembly is further balanced to minimise vibration levels.
  
  
• Casings
  JM fan casings are heavy gauge steel with spun flanges and continuously welded seams. They are manufactured to stringent tolerances for roundness assuring proper blade tip clearances required for optimal performance. Non-Overloading JM Aerofoil fans have a non-overloading characteristic. The peak power input occurs within normal operating range of pressures and is always exceeded by the motor rating. Reversal of Airflow JM Aerofoil fans can be reversed for emergency use. Reversal is obtained by interchanging electrical connections. If frequent reversals are necessary, contact the factory. A ‘truly reversible’ impeller can be provided where equal volume in either airflow direction is required.
  
  
• Accessories
  • Motor and Impeller side guards
  • Mounting Feet
  • Horizontal or vertical suspension clips
  • Companion Flanges
  • Flexible Connectors
  • Back draft Dampers
  • Inlet Bells
  • Vibration Isolators
  • Outlet Cones, Silencers and Acoustical Diffusers
  
  
• Finish
  Parts are cleaned, primed and then finish painted with premium grade enamel. Hot dipped galvanized, epoxy and other coatings are also available.