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Lee Kaiser posted this on November 13, 2017
We are excited to announce that registration for our 2018 Seminar Series: Fire Protection Playbook is now open! Led by ORR VP of Engineering, Lee Kaiser, this annual seminar series will make its way..Read More
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WATER MIST FIRE SUPPRESSION

A water mist system is a fire protection system which uses very fine water sprays (i.e. water mist). The small water droplets allow the water mist to control, suppress or extinguish fires by:

  • cooling both the flame and surrounding gases by evaporation
  • displacing oxygen by evaporation
  • attenuating radiant heat by the small droplets themselves

The effectiveness of a water mist system in fire suppression depends on its spray characteristics, which include the droplet size distribution, flux density and spray dynamics, with respect to the fire scenario, such as the shielding of the fuel, fire size and ventilation conditions.

The use of water mist fire suppression, when compared to the use of gaseous agents and traditional sprinkler systems, has revealed advantages such as:

  • Immediate activation
  • High efficiency in the suppression of a wide variety of fires
  • Minimized water damage
  • Environmentally sound characteristics
  • No toxic problems

Why High Pressure Water Mist?

The NFPA 750 defines three pressure regions for water mist-generating technologies: low, intermediate and high pressure systems. Marioff’s rigorous testing procedures, combined with the company’s unrivalled experience, have shown that high pressure water mist consistently delivers:

  • Better penetration into the seat of the fire
  • Superior coverage of the protected volume
  • An improved cooling effect from better mixing of gases and high evaporation rate
  • Lower overall system weight
  • Less water consumption
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