Deluge Foam Water Fire Sprinkler System
The deluge foam water fire sprinkler system is similar in the foam water fire sprinkler system. The Deluge foam water fire sprinkler system is unique in that it will mix water with a low expansion foam based agent designed to spray from a specially designed fire sprinkler head. Deluge foam water fire sprinkler systems are created for high flammable areas of specific fire hazards and are designed generally for a specific application such as a gas fire. Foam water fire sprinklers are designed to extinguish fires designated as Class A fires such as organic solid material such as wood, Class B fires that involve liquid such as gas and oil, and Class C fires that involve electricity.
Wikipedia states, “"Deluge" systems are systems in which all sprinklers 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 fire alarm system. The type of fire alarm initiating device is selected mainly based on the hazard (e.g., smoke detectors, heat detectors, or optical flame detectors). The initiation device signals the fire alarm 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 fire alarm pull station, which signals the fire alarm panel, which in turn signals the deluge valve to open.
Operation - Activation of a fire alarm initiating device, or a manual pull station, signals the fire alarm panel, which in turn signals the deluge valve to open, allowing water to enter the piping system. Water flows from all sprinklers simultaneously.”