Majax-2 Belt Drive

Fans witted with IP55 TE Class F electric motors.
Casings include as standard an access panel.
Impeller blades are adjustable at standstill
Range covers sizes from 400 to 1600mmØ
Aerofoil aluminium blades in presses steel hub
Fans are selected from Majax-2 performance curves or Donkin Fan selection program
Impellers dynamically balanced to ISO 1940 – G6.3
Operating temperature -10 to 60ºC
On special request;
Other voltages, finishes and material
Impellers available in Fabricated fixed pitch arrangement
Twin Motors available upon request
Majax-2 Belt Driven axial flow fans are manufactured in diameter ranging from 400 to 2000mm ( Bigger sizes available on special request) and incorporate manually adjustable pitch alumunium bladed impellers.

Sizes

Sizes vary in accordance with the preferred increments covered in ISO 497-1973(E) R20. These sizes are:
400, 500, 560, 630, 710, 800, 900, 1000, 1250 & 1600mm Diameters.

Applications

This range of fans is ideally suited for moving large volumes of air against low and medium pressures in the following typical applications:

Smoke control and exhausting heat from buildings
Spray booth extraction or where the fan would move contaminated flammable fumes.
Combinations of motor speeds, impellers blade pitch settings and the number of blades per impeller (Full and half solidity), provide flexibility in terms of selection. Fans offering good efficiencies can be selected over a range of volumes from 0.3m³/sec to over 50m³/sec at pressures up to 1000 Pa.

Impellers

Impellers incorporate die-cast alumunium alloy blades of aerofoil section, which are clamped in split steel hubs. (Majax-2 1250-H impellers have split aluminium hubs)
Blade pitch adjustment is achieved by slackening the hub clamp bolts and setting the blades to the required pitch prior to re-tensioning the clamp bolts.
Majax-2 400 to 1250-F impeller hubs are electro coated, Majax-2 1250-H hubs are aluminium cast and Majax-2 1600 hubs are fabricated and hot dip galvanized. All aluminium surfaces are left natural. Fasteners used are zinc plated.

Balancing

Impellers are dynamically balanced to ISO 1940 grade G6,3.

Casings

Standard casing lengths (SL) usually cover the impeller and motor assemblies.
Casings incorporate viewing access panels for impeller / bearing inspection and re-lubrication where required.

Direction of Air Flow

Forms A, AU and AD are standard arrangements
for belt driven fans, having the bearing and drive
assembly mounted upstream of the fan impellers.
These forms can also be used on direct driven
fans.
Mechanical details and bearing selection on all
Majax-2 fans, whether direct or belt driven, are
suitable for any of these attributes.