We manufacture single-stage and multi-stage axial fans that operate in counter-rotation and are used for auxiliary ventilation underground in mines and tunnel boring works.
These devices have a compact design, so they take up very little space and can be hung from the tunnel walls or attached directly to the ducts.
This type of fan can withstand a wide variety of pressures and flow rates.
Multi-stage fans allow for reduced bag diameters.
Manga aspirant
Noxious gases are extracted from the inside of the mine through a chimney.
Blowing bag
Fresh air is injected through a chimney and expelled through the intake ramp.
Main fans are used to move the total volume of air inside the mine.
These robust and large-sized units move flows ranging from 100,000 to 750,000 m³ per hour, generally at a low level of revolutions per minute.
Auxiliary fans provide air at remote locations inside the mine.
They are used to inject or extract air. They are small and easy to manoeuvre, and operate at flow rates of 10,000 to 100,000m³ per hour and pressures up to 1000 mm CA.
SINGLE STAGE FANS
General purpose aerofoil fans do not have rotating blades. The impeller rotates within a cylindrical housing and is mounted directly on the drive motor shaft.
TWO-STAGE FANS
The use of counter-rotating units allows considerable pressures to be obtained. This ventilation system consists of two or more fans with blades of different orientation placed in series. The blades rotate in opposite directions and are directly coupled to their corresponding motors. This system was initially introduced by the Woods company and is now used worldwide.
FANS WITH GUIDE VANES
Units with guide vanes placed on the discharge side of the fan allow obtaining average pressures between those produced by single-stage counter-rotating equipment and those generated by two-stage equipment of the same diameter and the same speed.
RIGID AND FLEXIBLE SLEEVES
These are blower or suction ventilation ducts with diameters of 300 to 1500 mm and standard lengths of 15, 20 and 25 m. The sleeves feature a special reinforced construction for mining, using ripstop polyester fabric with a double layer of PVC.