Understanding the composition and use of CO2 fire extinguishers will help to make the fire more effective in order to save lives and material wealth for the community. Assembly.
1. Composition CO2 extinguisher:
Pots are cast steel, cylindrical, often painted red. Always label the manufacturer and specifications, how to use the fire extinguisher.
At the top of the tank is a valve assembly made of copper alloy with a 1-way valve type (Polish, Russian ...), or one-way compression spring valve, The dipper is also the hand (the jar of Japan, China ...). There is a lead clamp to ensure the quality of the bottle.
Exhaust valve
Lead lock
On the valve assembly there is a safety valve, the valve works when the pressure in the tank exceeds the specified valve will discharge the gas out to ensure safety.
The sprayers are usually made of hard plastic attached to the valve coupling through a rigid steel pipe or soft tube. In the fire extinguisher CO2 is compressed to a high pressure.
Fire extinguishers
2. Principle of operation of fire extinguishers using CO2:
The fire-fighting mechanism (effect) of CO2 is to dilute the concentration of combustion vapors in the combustion zone and it also has the effect of cooling the liquid CO2 as it evaporates.
When opening the valve, due to the pressure difference, the liquid CO2 in the exchanger goes out through the diver's system and the injector turns into a CO2-like form, cold to - 78.90C. When sprayed into the fire, CO2 is used to dilute the mixture of combustion air vapor, and at the same time, to cool the combustion zone leading to fire suppression.
CO2 Fire Extinguisher
3. Scope of use of CO2 extinguishers:
CO2 fire extinguishers are often used to stave off fires of electronic equipment, valuables or foodstuffs, as no fire extinguishers are stored on fire, so no further damage is caused.
Portable fire extinguishers are used to extinguish newly emerging fires: solid, liquid and highly effective fire for electrical firefighting, fire in enclosed rooms, Efficiently ventilate the area because CO2 gas diffuses quickly in the air.
Fire extinguisher pushes CO2
Do not use carbon monoxide to stave off fires of coal or red hot metals as the carbon dioxide in the flask produces very toxic CO and is explosive when exposed to coal.
4. How to use CO2 extinguishers:
When the fire is detected, move the jar to near the fire point, pull the locking pin, direct the nozzle as close to the fire as possible.
Squeeze the valve to allow the CO2 to extinguish the fire.
How to use CO2 extinguishers
Pay attention when using CO2 extinguishers
Prior to spraying in closed rooms, people must be left out of the room, planning to exit after spraying with CO2 because when sprayed, it will produce very toxic CO.
Since there are many types of CO2 fire extinguishers, it is important to read the instructions carefully and to understand how the fire extinguishers work.
When spraying, it must be held vertically, standing at the end of the wind direction (external fire); standing near the door (in fire), must spray completely off fire to stop spraying.
When spraying the fire, the liquid must be sprayed onto the burning surface, avoiding direct erosion into the liquid as it fires out, fires louder.
Prevent cold scald, only be held on the plastic, rubber on the nozzle and sprayer, lever, when spraying done to avoid holding the bottle directly.