Mine fans for local ventilation are designed for ventilation of dead-end mine workings in mines, including hazardous ones for gas and dust, with an air density of up to 1.3 kg / m, at a temperature from -20 C to +35 C, dust content up to 50 mg / m and relative humidity up to 95% (at a temperature of +25 C).
Aerodynamic characteristics allow the fan to be used in relatively small blind workings. Explosion protection is ensured by the use of explosion-proof electric motors, the shells of which correspond to the IP54 design.
Placement of the drive motor on a common frame with a fan without an intermediate shaft (VO-12 ... 22DN). Placement of the drive motor on a remote frame with a fan through an intermediate shaft (VO-24 ... 40DN). The regulation is carried out by changing the angle of the impeller blades (with the fan stopped) and by the guide vanes (on the move), as well as by a frequency-controlled drive. They are completed with adjustable inlet guide vanes designed to increase the maximum fan pressure by 15-20% without reducing efficiency and for deep economical regulation.