...the sprinkler detector heads directly affected by the fire will operate. The immediate drop in air pressure within the detector line releases the pressure against the Deluge valve diaphragm unit causing the Deluge Valve to open and discharge water through all the open water spray nozzles to...

...electric power grid a pump using an electric motor may require the installation of an emergency generator The fire pump becomes active when the pressure in the fire sprinkler system drops below a threshold The sprinkler system pressure drops significantly when one or more sprinkler heads are...