Deluge Sprinkler Systems

“Deluge” systems are systems in which all sprinklers/nozzles connected to the water piping system are open, in that the heat sensing operating element is removed, or specifically designed as such. These systems are used for special hazards where rapid fire spread is a concern, as they provide a simultaneous application of water over the entire hazard. They are sometimes installed in personnel egress paths or building openings to slow travel of fire (e.g., openings in a fire-rated wall).

Water is not present in the piping until the system operates. Because the sprinkler orifices are open, the piping is at atmospheric pressure. To prevent the water supply pressure from forcing water into the piping, a deluge valve is used in the water supply connection, which is a mechanically latched valve. It is a non-resetting valve, and stays open once tripped.

Because the heat sensing elements present in the automatic sprinklers have been removed (resulting in open sprinklers), the deluge valve must be opened as signaled by a detection system. The type of detection initiating device is selected mainly based on the hazard (e.g., smoke detectors, heat detectors, optical flame detectors, or pilot heads). The initiation device signals the release panel, which in turn signals the deluge valve to open. Activation can also be manual, depending on the system goals. Manual activation is usually via an electric or pneumatic pull station, which signals the release panel, which in turn signals the deluge valve to open.

Operation – Activation of a detection initiating device, or a manual pull station, signals the release panel, which in turn signals the deluge valve to open, allowing water to enter the piping system. Water flows from all sprinklers simultaneously.

Below is a list of Sprinkler Systems we design, fabricate, install and maintain: