Axial Fans & Centrifugal Blowers

A fan is a device that is designed to move a specific volume of air (flow) against moderate pressure (resistance). A fan induces an airflow by virtue of its blades; a blade moves air by generating a lift force when in motion through the air. An axial flow fan is a fan in which the flow of air is substantially parallel to the axis of rotation.
The three main kinds of axial fans are-
• Propeller fans - These fans are used to move large quantities of air against very low static pressures. They are usually used for general ventilation or dilution ventilation and are good in developing up to 0.5 in. wg 
• Tube-axial fans - Tube-axial fans are similar to propeller fans except they are mounted in a tube or cylinder. Therefore, they are more efficient than propeller fans and can develop up to 3 to 4 in. wg). They are best suited for moving air containing substances such as condensable fumes or pigments.
• Vane-axial fans - Vane-axial fans are similar to tube-axial fans except air-straightening vanes are installed on the suction or discharge side of the rotor. They are easily adapted to multistage and can develop static pressures as high as 14 to 16 in. wg. They are normally used for clean air only.

• Low vibrations as per VDI 2056.
• Aerodynamic Performance tested as per BS 848 Part-1 (1980)
• Sound Performance tested as per BS 848 Part-2 1985.