Water Mist Systems

The water mist extinguishing system, designed and built by DI.MARCA Srl, operates at a pressure between 100 and 120 bar and is fitted with special nozzles which atomize water into tiny droplets that have an extinguishing effect on the fire resulting from the combination of three main effects:

  • Cooling action: Due to their size, the water particles are subject to rapid evaporation, with the consequent removal of a large amount of thermal energy
  • Inertia-creating action: the water vapour generated by the water behaves as a true inert gas that helps to control and suppress the fire
  • Shielding action: the atomised particles of water are able to absorb the radiant energy emitted by the fire, significantly reducing the likelihood that materials located in the vicinity of the flames reach their ignition temperature.


  • Machinery, turbine and generator rooms, platforms
  • Stores, shops, offices, hotels, archives, libraries
  • Computer and telephone rooms
  • Military vessels, cruise ships and other passenger boats


  • Ecofriendly
  • Minimises the damage caused by the fire-extinguishing agent
  • Safe for people
  • Avoids the cost and clutter of large storage tanks

The water mist extinguishing system has been tested and certified, the DI.MARCA engineers have conducted several types of tests, placing the system in problematic and specific situations, all of which it has passed. The water mist system, offered by DI.MARCA, complies with fire prevention standards NFPA 750, IMO 913, A800 and IMO / CIR. 1165. It has been tested in accordance with FM standards (Appendix G and H) and certified by BV (Bureau Veritas). The nozzles are tested according to UL standards and tests were carried out for archives and electrical cables by RINA Industry. The water mist system in addition to belonging to class 1 (minimum diameter of the drops of water spray less than 100 microns) is considered appropriate, by the above standard, for extinguishing fires of Class A (solid fuels such as paper, wood, etc.) and Class B (liquid fuels such as gasoline, oil, etc.

Share by: