Fire Extinguisher System

System Information
 
Fire Extinguishers:
A fire extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i.e., no escape route, smoke, explosion hazard, etc.), or otherwise requires the expertise of a fire department. Typically, a fire extinguisher consists of a hand-held cylindrical pressure vessel containing an agent which can be discharged to extinguish a fire.
 
There are two main types of fire extinguishers: Stored pressure & Cartridge-Operated:
 
Stored Pressure: In stored pressure units, the expellant is stored in the same chamber as the firefighting agent itself. Depending on the agent used. With dry chemical extinguishers, nitrogen is typically used; water and foam extinguishers typically use air. Stored pressure fire extinguishers are the most common type.
 
• Cartridge Operated: Cartridge-operated extinguishers contain the expellant gas in a separate cartridge that is punctured prior to discharge, exposing the propellant to the extinguishing agent. This type is not as common, used primarily in areas such as industrial facilities, where they receive higher-than-average use. They have the advantage of simple and prompt recharge, allowing an operator to discharge the extinguisher, recharge it, and return to the fire in a reasonable amount of time.
 
Components of the System
Components of the System
1 Valve assembly
2 Operating lever
3 Support handle
4 Safety pin
5 Safety pin tie
6

Valve spring

7 Anti tamper seal
8 Handle rivet
9 Pressure gauge 1345 kPa
10 Neck seal 'O' ring
11 Check stem assembly
12 Valve spring
13 Siphon tube adaptor nut
14 Siphon tube
15 Hose assembly (excluding nozzle)
16 Nozzle
17 Hose retainer bracket
 
 
Operational Information
 
Fire Extinguishers:

A fire- extinguisher is an absolute necessity in any home or office. While there's a good chance that the extinguisher will sit on the wall for years, collecting dust, it could end up saving your property and even your life.

 

Fire is the result of a chemical combustion reaction, typically a reaction between oxygen in the atmosphere and some sort of fuel (wood or gasoline, for example). Of course, wood and gasoline don't spontaneously catch on fire just because they're surrounded by oxygen. For the combustion reaction to take place, the fuel has to be heated to its ignition temperature.

 
Fire Extinguishers:
 
Basic System Functional Operation & a typical Fire Extinguisher Arrangement:
 

Basic System Functional Operation & a typical Fire Extinguisher Arrangement:

 
To use the extinguisher, you pull out the safety pin and depress the operating lever. The lever pushes on an actuating rod, which presses the spring-mounted valve down to open up the passage to the nozzle. The bottom of the actuating rod has a sharp point, which pierces the gas cylinder release valve. The compressed gas escapes, applying downward pressure on the fire-suppressant material. This drives the material up the siphon and out the nozzle with considerable force. The proper way to use the extinguisher is to aim it directly at the fuel, rather than the flames themselves, and move the stream with a sweeping motion.
 
 
 
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