Navy

Water Saving Nozzle

A novel atomizing nozzle that shears a water stream into droplets of 100 microns in size and delivers them to the target on a stream of air, using far less liquid than existing systems

Military Technology
The US Navy has developed a fire hose nozzle that extinguishes fires using only a fraction of the water and pressure required by a standard fire hose nozzle

The US Navy has developed a fire hose nozzle that extinguishes fires using only a fraction of the water and pressure required by a standard fire hose nozzle

The Naval Air Warfare Center, Aircraft Division (NAWCAD) at Lakehurst, NJ, has developed, tested, and patented a high efficiency nozzle that atomizes water with 80% less water pressure and is adaptable to other applications where low liquid use is desirable. The NAWCAD solution sheers a water stream into droplets 100 microns in size. The droplets expand into a layer of fine mist that is carried to the target on a pressurized stream of air. The fine mist depletes the oxygen at the point of combustion and extinguishes the fire with up to 90% less water used.

The nozzle is fed by two hoses. The first is a water hose that can range in size from a garden hose to a fire hose. The second is a low pressure air line fed either by a compressor or compressed air tanks. The low pressure requires less physical strength to operate and leads to lower exertion rates. The apparatus is fully adjustable for air/water ratio and the desired spray distance. Various prototypes have been built and tested. Improved efficacy compared to previous solutions has been demonstrated in field trials.

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