Technical comparison between deluge, low pressure and high pressure water mist |
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SPRINKLER DELUGE | LOW PRESSURE WATER MIST | ULTRA FOG PRESSURE WATER MIST | |
Water consumption density | 10.2 - 25 lpm/m² (2.7 - 6.6 gpm/ft²) | 2.2 - 5.0 lpm/m² (0.6 - 1.32 gpm/ft²) | 0.9 to 1.65 Lpm/m² |
Nominal zone water flow l/m² (25 m x 12 - 18 m, 82 ft x 39 - 60 ft) |
3060 - 9180 lpm/m² (808 - 2425 gpm/ft²) | 660 - 1300 lpm/m² (174 - 343 gpm/ft²) | 270 to 495 lpm |
Water reservoir for 1 hour with 3 zones active (75 m, 246 ft tunnel protection) |
550 - 1450 m³ (19250 - 50750 ft³) | 119 - 235 m³ (4165 - 8225 ft³) | 48 to 89 m³ |
Water pressure nozzles and at pumps | Nozzles: 1.1 - 2.5 bar (15.9 - 36.2 PSI) Pumps: 6 - 8 bar (87 - 116 PSI) |
Nozzles: 10 bar (145 PSI) Pumps: 15 bar (217 PSI) |
Nozzles: 55 to 65 bar Pumps: 85 to 100 bar |
Riser pipe in 2 km (1.2427 mi) tunnel | 250 - 600 mm pipe (10” - 24”) | 125 - 150 mm pipe (5” - 6”) | 65 to 80mm |
Power need for pump | 132 - 250 KW | 78 - 112 KW 115 to | 115 to 250 kw |
Share riser pipe water supply with hydrants | Yes (optional) | Yes (optional) | Yes as option, high pressure hydrant |
Share fire waterpumps with hydrants | Yes (optional) | Yes (optional) | Yes as option, high pressure hydrant |
The triangle-based formula for extinguishing fire also prevents from a probable re-ignition. The system absorbs in an efficient way and removes smoke and other toxic substances left after the fire occurred, another feature that is not possessed by traditional fire protection options. Of course, the degree to which smoke and gases are absorbed and removed depends on the specific system design, parameters applied, and on the volume and chemical composition of the burnt material. The specific design objectives of water mist are fire control, temperature control, exposure protection, suppression, and extinguishment. Fire is simply not sustainable without heat and oxygen.
Small pipe dimensions mean light weight and easy to install. High-performance stainless-steel nozzle can cover up to 48 square meters. Wider nozzle spacing means less labor and installation costs. Consider the ultimate Ultra Fog nozzles are the only ones that can be tested without breaking the frangible glass bulb thanks to the patented nozzle test tool.