Fire Monitoring System

- Agustus 22, 2017

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A deluge gun, fire monitor, master stream or deck gun is an aimable controllable high-capacity water jet used for manual firefighting or automatic fire protection systems. Deluge guns are often designed to accommodate foam which has been injected in the upstream piping.


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Background

The term monitor may be derived from the class of warships known by the same name, that were armed with disproportionately large guns.


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Installation

Deluge guns are often fitted to fire boats, tug boats, and on top of large fire trucks for use in manual firefighting efforts, where they can be aimed and operated by one firefighter and are used to deliver water or foam from outside the immediate area of the fire. Deluge guns are sometimes installed in fixed fire protection systems to protect high hazards, such as aviation hangars and helicopter landing pads. Similarly, facilities with highly flammable material such as oil refineries may have permanently installed deluge guns. Most apparatus-mounted deluge guns can be directed by a single firefighter, compared to a standard fire hose which normally requires several. Deluge guns can be automatically positioned for fixed systems, or may have portable designs. The latter option enables a firefighter to set up the gun to apply water to a blaze, before leaving it in place to attend to other tasks.


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Capacity

A deluge gun can discharge 2,000 US gallons (7,600 liters) per minute, or more. A master stream is a fire service term for a water stream of 350 US gallons (1,300 liters) per minute or greater. It is delivered by a master stream device, such as a deck gun, deluge gun, or fire monitor. Master streams are often found at the end of aerial ladders, tele-squirt nozzles, or monitor nozzles. The high pressure that they require renders them unsuitable for handline use.


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Risks

A master stream brings with it many risks when used in an urban setting. A master stream should never be fired into a building with people inside, as the force could knock down a supporting wall in a structure and crush victims. Also, the steam resulting from the high volume of water delivered could cause a blowout or displace oxygen from an enclosed area, creating a risk of asphyxiation.

Source of the article : Wikipedia



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