The Model AGCX from AG Fire Sprinkler Deluge Valve is a hydraulically operated, latching clapper-type valve used to control the water supply to a deluge or preaction system. Deluge systems use open sprinklers or nozzles as discharge outlets in the fire area, while preaction systems use closed sprinklers or nozzles. Both systems use separate detection devices to control the operation of the Deluge Valve.