Airtrack Far East Pte. Ltd.

Fume Scrubber and Fan System that will soak up all the foul air from your workplace

 We Move and Purify Air


Centrifugal fans are basically consist of a wheel or a rotor mounted on a shaft that rotates in a scroll-shaped housing. Air enters at the eye of the rotor, makes a right-angle turn, and is forced through the blades of the rotor by centrifugal force into the scroll-shaped housing. The centrifugal force imparts static pressure to the air. The diverging shape of the scroll also converts a portion of the velocity pressure into static pressure.

In order to select the fan for an exhaust system it is necessary to know exactly what work the fan is expected to do. Its purpose, of course, is to establish and maintain a prescribed rate of airflow through the various elements of the system. The requirements of the system are expressed in terms of the desired flow-rate and the static pressures at the fan inlet and outlet. Until these factors have been established the fan cannot be chosen.

Basically there are three Types of Centrifugal Fans:

Radial-Blade Fans

The radial blade, or "paddle wheel" design is often called the work-horse of industrial exhaust systems. It is of rugged constructions, has relatively few flat-surfaced blades. It resists abrasion well, and can handle suspended material with a minimum of accumulation, or bridging. It is large in size, lower in mechanical efficiency than the backward-curved design. It is good for material handling like woodworking and conveying of light materials.

Forward-Curved-Blade Fans

Although running at a slower speed, forward curved (or squirrel cage) design used for air handling purposes has little application in exhaust system work. It is very unstable in area at lower performance ratings.


Backward-Blade Fans

AeRon® Fans are Fans with Backward Blades. Vector diagrams of the velocity at the blade tip show that the air leaves the backwardly inclined blade at lower velocity   than the tangentially velocity of the wheel. As a result, the conversion to static pressure in the fan casing takes place with lower loss than other types. The air from both the radial and forward curved types is moving faster, relative to the casing, than the tip-speed of the wheel.

The efficiency of backward-curved fans is good. An important feature is its load-limiting characteristic. The pressure-volume curve falls steeply and because the volume increases more slowly than the pressure falls, the power curve flattens and droops. This attribute is especially useful when the system resistance fluctuates as, for example, during the build up of air-loading like a sudden opening up of air dampers. In this instance the flow through the system remains approximately constant while waiting for it to pass to a loading condition. Likewise the power input has changed very little which permits the selection of a motor to closely fit the system requirements with little danger of overloading.


AeRon® Fans can be manufactured from inlet size of 160, 200, 250, 315, 355 and 400 (mm) with Casings and Impellers in solid FRP (Fiberglass) only. Static Pressure from 100 to 2000 Pascal and airflow capacity from 250 to 10,000 cubic meters per hour.

Fans with inlet size  450, 500, 560, 630, 710, 800, 900 and 1000 (mm) are manufactured with Casings either in FRP, PP, PE or PVC and Impellers in FRP only. Static Pressure from 1000 to 3000 Pascal and airflow capacity from 5000 to 90,000 cubic meters per hour.

AeRon® High Pressure Fan

We also have a wide range of high pressure fan which can deliver static from 2500 to 9650 Pascal and airflow capacity from 340 to 7335 cubic meters per hour. These are direct driven radial blade fans come with three phase current-2 Pole Motors at 415 Volts – 50 Hz. Casings and Impellers are solid FRP (Fiberglass), and are highly chemical resistant.

If you have a requirement and are looking for a scrubber system, fans or ductwork, do give us a call or send an email to us. If possible give a brief description of your requirement and see if we can be of help or service to you.