A fan is selected based on the following information:

• The quantity required to be moved by the fan (at least three duty points are required and how long the duty point will be required during the life of the project)
• The system resistance static pressure (Internal fan losses are then determined by MTV)
• The fan inlet air properties such as
  • Air density (dry air)
  • Wet and Dry bulb temperature
  • Barometric Pressure
• Airway diameter where the fan will connect to
• Whether noise is a potential issue (exhaust shaft close to residential areas)

These points could be applied in any application and could be less complicated if selected for a fixed system.  However, various other factors must also be considered in the decision making when selecting a fan for an underground mine.

The important step is understanding your site limitations and overall risk.

Limitations and risk factors are the following but not limited to:

• Shaft stability
• Whether an escape-way is integrated in the exhaust system
• Salt water ingress into the shaft
• Access to reset the fans in an emergency
• Noise
• Available space for the fans

The list goes on and on

MTV has a large range of axial flow fans as well as centrifugal fan options to support your application.