What is Watermist
Overview of Watermist:
Introduction & Concepts

 Watermist is a highly versatile and extremely efficient fire fighting method. Watermist is different from other common water based systems in respect of its droplet size, it contains a much smaller droplet size than traditional sprinkler output. This is important for a number of reasons:-

When a droplet of water vaporises, it expands by approximately 1,600 times. Heat absorption is a function of surface area and not volume, therefore smaller droplets result in more surface area and faster heat absorption.

The average droplets contained in a water fog yield a total surface area at least 100 times greater than conventional sprinkler droplets for the same water volume. Therefore, much smaller amounts of water required by water fog to absorb energy from the fire.

 Watermist has a unique ability to deliver water as a fine atomised mist or fog as it is also referred to (depending on the micron size of the individual droplets). This mist or fog is quickly converted  to steam which smothers the fire and prevents further oxygen from reaching it. Simultaneously the evaporation creates a significant cooling effect, cools the combustible gases and blocks the transfer of radiated heat.

 Water vapour depletes the oxygen contents inside the fire itself (but not in the space in general) and once the fire is extinguished prevents re-ignition.

 Watermist combines the fire suppression properties of both conventional water-based Deluge or sprinkler systems and gaseous fire suppression systems.

 Full scale testing and actual fires have proven that water mist is a most efficient means for fire fighting, while not featuring the drawbacks of conventional systems. History has shown that users who have opted for water mist usually come back as repeat customers.

 Crown Fire have designed and developed both low pressure mist eg; and high-pressure fog systems to suit the wide array of fire protection applications that benefit from this technology. We have provided an extensive list of these HERE on our applications guide.

Summary of watermist benefit

Safe for people and occupied areas

Fast suppression times minimising physical damage

Low water volumes resulting in minimal damage

Rapid clean up times preventing extended downtime

Low cost system reinstatement following discharge

Smoke damage reduced

Small pipe bores making installation more cost effective

Easy & cost effective to service & maintain

Environmentally Sound
 
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