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Water Mist based Fire Protection Systems have been developed. This includes new nozzles for the generation of water mist, working at low pressure of 12 bars and above to facilitate the proper atomisation of water droplets under high pressure. This systems is used for the following applications:
Water mist systems are used for special hazards applications. This type of system is typically used where water damage may be a concern, or where water supplies are limited. NFPA 750 [19] defines water mist as a water spray with a droplet size of "less than 1000 microns at the minimum operation pressure of the discharge nozzle". The droplet ...
High pressure water misting systems for expensive and delicate equipment, for example, marine engine rooms. Deluge systems for protecting assets or keeping potentially explosive materials cool in the event of fire (e.g. gas canisters) Water tunnel systems designed to ensure a safe "cool" corridor to allow people to escape in the event of fire.
Specific gravity is the ratio of the mass of a given volume of liquid to the mass of the same volume of water. In spraying, the main effect of the specific gravity Sg of a liquid other than water is on the capacity of the spray nozzle. All vendor-supplied performance data for nozzles are based on spraying water.
In 1993 the company Kappa Filter Systems was founded in Steyr (Upper Austria) in conjunction with Klaus Kröger for the maintenance of pure air in industry. [4] Also in 1993, HAINZL started with the development of fire-fighting systems with high-pressure water mist, which are offered under the brand “Aquasys”. [5]
Water cannon used for crowd control in Jerusalem during the 2020 protests against Benjamin Netanyahu Water cannon during a German demonstration, 2001. A water cannon is a device that shoots a high-velocity stream of water. Typically, a water cannon can deliver a large volume of water, often over dozens of meters.
Most venturis normally operate with pressure drops in the range of 50 to 150 cm (20 to 60 in) of water. At these pressure drops, the gas velocity in the throat section is usually between 30 and 120 m/s (100 to 400 ft/s), or approximately 270 mph at the high end. These high pressure drops result in high operating costs.
Aerosol spray is a type of dispensing system which creates an aerosol mist of liquid particles. It comprises a can or bottle that contains a payload, and a propellant under pressure. When the container's valve is opened, the payload is forced out of a small opening and emerges as an aerosol or mist. Aerosol spray can