Types of Fire Sprinkler Systems
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Deluge Sprinkler Systems
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The deluge fire sprinkler system is the one that most people are familiar with. This is a system of sprinklers spread throughout the building and attached to a system of pipes that are connected to a water supply. When a fire is detected, the valves open and water is fed to all sprinklers at one time, dousing the fire before it has a chance to do damage. These systems use electrical, pneumatic or hydraulic detection and valve-opening systems.
Foam Water Sprinkler Systems
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The foam water sprinkler system is quite a bit like the deluge system. Water lines are connected to sprinklers and a detection and valve-opening system. The difference is that the system also has a foam-injection system. When a fire is detected, the water valves and the foam-injection valves open, the foam is injected into the water and the mixture is spread over the protected area. The foam does a better job of smothering the flames than water alone. This type of system is mainly used in storage buildings where many different flammable materials are stored.
Pre-Action Sprinkler Systems
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The pre-action sprinkler system is a deluge system that has been modified for use in areas where high-value items can be damaged by accidental release of water. With a deluge system, water is always in the pipes, so if a pipe bursts or a sprinkler head malfunctions, they can leak or drip water. With a pre-action system, the water lines to the sprinklers are dry. When fire is detected, the system opens a valve that allows water into the pipes and run to the sprinklers, but the sprinklers do not activate until the heat in the area reaches a pre-set temperature.
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