Chapter 1:
DELUGE VALVE SYSTEM : A Deluge System is a fixed fire protection system in which the pipe system is empty until the deluge valve operates to distribute pressurized water from open nozzles or sprinklers.
Deluge valve system mainly consists of deluge valve which is known as the control valve.Deluge valve system can be activated by a hydraulic ,pneumatic ,electric or manual release system and a combination of any of these release system.
Basically, Deluge valve is a quick release hydraulic operated diaphragm valve .It has three chambers isolated from each other by the diaphragm operated clapper and seat seal.
While in 'SET' position, water pressure is transmitted through an external bypass check valve and restriction orifice from the system Supply side to the top chamber, so that supply pressure in the top chamber acts across the diaphragm operated clapper which holds
the seat against the inlet supply pressure because of differential pressure design.
On detection of fire the top chamber is vented to atmosphere through the outlet port via opened actuation device(s). The top chamber pressure cannot be replenished through the restricted
inlet port, thus it reaches less than half the supply pressure instantaneously and the upward force of the supply pressure lifts the clapper allowing water to enter the system piping network and alarm devices.
STANDARDS FOR DELUGE VALVE SYSTEM :
NFPA 13
IS 15325 : 2003
DELUGE VALVE SYSTEM : A Deluge System is a fixed fire protection system in which the pipe system is empty until the deluge valve operates to distribute pressurized water from open nozzles or sprinklers.
Deluge valve system mainly consists of deluge valve which is known as the control valve.Deluge valve system can be activated by a hydraulic ,pneumatic ,electric or manual release system and a combination of any of these release system.
While in 'SET' position, water pressure is transmitted through an external bypass check valve and restriction orifice from the system Supply side to the top chamber, so that supply pressure in the top chamber acts across the diaphragm operated clapper which holds
the seat against the inlet supply pressure because of differential pressure design.
On detection of fire the top chamber is vented to atmosphere through the outlet port via opened actuation device(s). The top chamber pressure cannot be replenished through the restricted
inlet port, thus it reaches less than half the supply pressure instantaneously and the upward force of the supply pressure lifts the clapper allowing water to enter the system piping network and alarm devices.
STANDARDS FOR DELUGE VALVE SYSTEM :
NFPA 13
IS 15325 : 2003
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