Tunnel Drilling Ventilation

Axial Fans

  • Single stage (AXC) and multi stage (AXC...GC) for higher pressures 
  • Diameter from 600 up to 2.400 mm 
  • Air volume up to 120 m³/s
  • Unidirectional or reversible
  • Pressure up to 9000 Pa
  • Explosion-proof (ATEX) versions
  • Performance in accordance with ISO 5801 and AMCA 210

Flexible duct

  • Type G&G in high tenacity polyester fabric, coated in PVC 
  • Diameters from 300 to 2.500 mm
  • Mass per unit area from 600 to 850 g/m²
  • Suitable for pressure up to 10000 Pa
  • Available also in antistatic version (AA)
  • Easy installation with special hooks and pipe joints 
  • Low pressure loss and air leakage


  • Dedusting units specially designed for underground applications 
  • Structure and built up in modules so to allow maximum flexibility 
  • Air volumes from 2 to 30 m³/s, larger volumes on request depending on the available space in the tunnel 
  • Efficiency up to 99.9% for particles sizes between 0.2 and 2 microns 
  • Suitable for a standard concentration of 2.000 mg/m³
  • Dedusters can be installed on Tunnel Boring Machine or at tunnel face near the Road Header Machine
  • Explosion-proof (ATEX) versions on request


  • Frequency converters (V100) designed for fan applications with a square torque output
  • In accordance with IEC/EN61000-3-12 
  • The application in severe environment like tunnels is achieved via paint electronic boards 
  • Power range from 35 to 250 kW
  • Protection up to IP54
  • On board friendly key display with latest communication protocols (Modbus, Ethernet, BACnet, MSTP/IP, etc.)
  • Advanced features as double PID, multi fans control, critical frequencies, etc. 
  • Control features with IEC61131-3


Chillers and Air Handling Units are specially designed for tunnel face cooling. Also cooling equipments can be supplied to blow cool primary air and special designed chillers, air or water types, can be used to supply cooled water for TBMs

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