Water Mist Fire Sprinkler Systems

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How Exactly Do They Work?

Picture courtesy of Fire Safety Search

Fire sprinklers are a part of a vital system that help protect your building against fire. They are a part of a complicated system and they can become even more complicated because there are numerous different types of systems. Fire sprinkler systems include:

For this week’s blog post we will be focusing on Water Mist Fire Sprinkler Systems. Water Mist Fire Sprinkler Systems are not be confused with Water Spray Fire Sprinkler Systems. The mist systems are used in locations where water damage is a big concern. These systems involve fire sprinklers that use mist to lower the temperature of the flame.

How Do They Work

Water Mist Fire Sprinkler Systems can function as deluge, wet pipe, dry pipe, or pre-action systems. What differentiates a Water Mist System from these other systems is how the water leaves the nozzle. Water Mist Systems have a compressed gas that is pumped through the fire sprinkler pipe. When the water is released through the head, the mist creates a heat absorbent vapor. This vapor creates a mist that takes up a large surface area of the room. Because the mist is so compact it cools down the room. As the room cools down, so does the flame.

According to NFPA, in order for the water coming out of the system to be considered functional the droplets must be, “less than 1000 microns at the minimum operation pressure of the discharger nozzle.” The smaller the droplets, the more droplets there are. More droplets lead to a denser mist.

Pros and Cons

Water Mist Fire Sprinkler Systems are great for buildings that have low water pressure. This is because the system uses gas to push out the mist. These systems are also great for buildings that are concerned about heavy water damage.

A big con for these systems is that they are fairly new. This means that while there is an NFPA code approving their usage, some people speculate as to how effective they really are. Another negative of Water Mist Fire Sprinkler Systems is that they are extremely expensive and need to be approved by a fire engineer. In order for a property to be considered to have a Water Mist Fire Sprinkler System installed, a fire engineer must inspect it. The engineer must determine whether or not this type of system would be significantly beneficial to the building. Some of these benefits are: lower water requirements, smaller pipe sizes, and providing better water control. These systems are very expensive so it is important that they are needed before they are installed.

Here at IFS we pride ourselves in our knowledge when it comes to the vast range of fire sprinkler systems. If you want more information about Water Mist Fire Sprinkler Systems or any of the other fire sprinkler systems give us a call at 888-987-5322.

-The IFS Team