Deluge System Sizing Calculator
Calculate deluge water spray system requirements per NFPA 15 for transformers, conveyors, and special hazards.
NFPA 15 Design Densities
| Application | Density (gpm/sf) | Duration |
|---|---|---|
| Transformers | 0.25 | 30 min |
| Conveyors (coal) | 0.30 | 20 min |
| Tank Exposure | 0.25 | 60 min |
| Aircraft Hangar | 0.20 | 10 min |
| Cable Trays | 0.30 | 20 min |
Deluge System Components
Deluge Valve
Main control valve held closed by air pressure or mechanical latch. Opens on detection signal to flood the entire system simultaneously.
Open Nozzles
Unlike sprinklers, deluge nozzles have no fusible element. All nozzles discharge immediately when the valve opens.
Detection System
Heat detectors, flame detectors, or smoke detectors activate the system. Manual pull stations provide backup activation.