Deluge & Water Spray Systems

Deluge systems are installations with a discharge pipe array fitted with open sprinkler heads or water spray nozzles with the water to the discharge pipe array being controlled by a quick opening (deluge) valve.

The operation of the deluge valve is controlled by an independent detection system, usually either electric (e.g. heat detectors, smoke detectors, or other detectors suited to the specific risk being protected) or a further system of small diameter piping with closed sprinkler heads charged with gas or water for control purposes.

On operation of the detection system the deluge valve is opened, water is admitted into the discharge pipe array and is discharged through the open sprinklers or water spray nozzles to provide complete coverage of the entire protected area.

Deluge systems are designed primarily for the protection of high hazard risks where intensive fires with a rapid rate of propagation are expected and it is desirable to discharge water simultaneously over the entire zone in which the fire may occur.

Water spray systems are utilised for more challenging fires where it is necessary to direct the water onto the hazard or surface being protected using directional nozzles. Water spray systems are most commonly used for exposure protection of bulk storage flammable and combustible liquid tanks to cool the shell, prevent explosion or collapse of the tank and extension of the fire. In addition, water spray systems can be utilized for extinguishment and control of some flammable liquids fires, some combustible liquid fires, class A combustibles, and electrical transformer applications.