Deluge valve quarterly maintenance checklist

Monitoring, owner and people near the gong told before trim opens

Monitoring company placed on test for waterflow and trouble signals, the owner told, and people near the gong or bell warned it will sound though no nozzle discharges, the call logged.

Impairment procedure applied to the protected hazard

Hazard's operator told the deluge may be out of normal while its trim is worked, process changes held until it is back, and the owner's impairment procedure and any fire watch followed.

Water-supply and priming pressures read

Supply water pressure and the priming or diaphragm pressure holding the valve closed both read at the gauges, readings noted, neither gauge stuck or pinned.

Priming and trim valves in their normal positions

Priming line and trim valves set to their marked normal positions, no weeping at the trim, nothing left isolated after prior service.

Pilot line pressure or electric release status read

Air pressure on a pneumatic pilot line or water pressure on a hydraulic pilot line read at its gauge, or the releasing panel display on an electric release, and the release type noted.

Automatic drain at the valve outlet checked for leakage

Automatic drain or drip check on the system side free to move with no steady flow, water here flagged as a seat or diaphragm leak for the contractor.

Detection and manual release station observed

Detection covering the hazard intact and reporting, release solenoid or pneumatic actuator in its normal state, manual release station in place, unobstructed and not left disabled.

Open discharge nozzles clear and aimed

Open sprinklers or spray nozzles clear of paint, debris and corrosion, each present and aimed at the hazard it was set for, none plugged or missing.

Hazard under the nozzles compared with the design layout

Equipment, tanks, conveyors or storage under the nozzles still where the design places them, nothing new blocking the spray, any change reported to the owner and the contractor.

Drainage or containment for the discharge seen clear

Floor drains, trenches, curbs or containment the discharge is designed to run to seen clear of debris and storage, so a release or test flow has somewhere to go.

Valve position and supervision checked

Main control valve open and supervised, tamper confirmed reporting to the panel, the operating and reset instruction plate legible at the valve.

Alarm pressure switch operated through the alarm test valve

With the deluge valve left closed, alarm test valve opened until the pressure switch or water motor gong operates and the panel shows waterflow, then shut and the alarm line drained.

Foam concentrate and proportioner valves checked where fitted

On foam-water systems, concentrate tank level read against its mark and the proportioner and concentrate valves in their normal positions, no leaks at the concentrate piping.

Panel normal and deluge trim back in position

Panel showing no waterflow, supervisory or trouble condition standing, alarm test valve shut, and priming and pilot pressures back at their normal readings.

Monitoring company and owner told the deluge system is restored

Monitoring company confirms signals came through and the account is off test, the owner and the hazard's operator told, and any impairment closed in the owner's log.