Majax-2

Fans witted with IP55 TE Class F electric motors.
Motors wired to external fixed terminal box.
PAD mounted motors are mounted on internal anti-vibration mounts.
Impeller blades are adjustable at standstill
Range covers sizes from 315 to 2250mmØ
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 40ºC
On special request;
Other voltages, finishes and material
Impellers available in Fabricated fixed pitch arrangement
Majax-2 axial flow fans are manufactured in diameter ranging from 315 to 2000mm (2250mm Diameter on special request) and incorporate manually adjustable pitch aluminium bladed impellers.

Sizes

Sizes vary in accordance with the preferred increments covered in ISO 497-1973(E) R20. These sizes are:
315, 400, 500, 560, 630, 710, 800, 900, 1000, 1250, 1600, 2000 & 2250mm 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:

General Ventilation: kitchen canopies, supermarkets, airport buildings, underground car parks, stairwell pressurization, gymnasiums, stadium cloak rooms, industrial buildings etc.
Air-conditioning
Smoke control and exhausting heat from buildings
Condenser cooling
Cooling towers
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 0.1m³/sec to over 100m³/sec at pressures up to 1000 Pa.

Impellers

Impellers incorporate die-cast aluminium 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-2 315 to 1250-F impeller hubs are electro coated, Majax-2 1250-H hubs are aluminium cast and Majax-2 1600, 2000 & 2250 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. External terminal boxes are provided on the casings of fans fitted with standard totally enclosed motors.
Casings incorporate viewing ports unless access panels are provided.

Direction of Air Flow

Standard form of airflow for direct driven
arrangement would be form B, BU and BA, having
motors mounted downstream of the impellers