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What fire extinguishers are used in libraries or archives?
Carbon dioxide fire extinguisher

Scope of application of carbon dioxide fire extinguisher:

1 has excellent properties such as good fluidity, high injection rate, no corrosion to containers and no deterioration. Used to put out the initial fire of books, archives, valuable equipment, precision instruments, electrical equipment below 600 volts and oil.

2. Suitable for class B fires, such as kerosene, diesel oil, crude oil, methanol, ethanol, asphalt, paraffin, etc.

3, suitable for class C fire fighting, such as gas, natural gas, methane, ethane, propane, hydrogen and other fires.

4. put out class e fires, such as fires in which objects burn with electricity.

Extended data working principle of carbon dioxide fire extinguisher;

At normal pressure, liquid carbon dioxide will vaporize immediately. Generally 1kg liquid carbon dioxide can produce about 0.5 cubic meters of gas.

Therefore, when putting out a fire, carbon dioxide gas can exclude air and surround the surface of the combustion product or distribute in a relatively closed space, thus reducing the oxygen concentration around the combustible or in the protective space, causing suffocation and extinguishing the fire.

In addition, when carbon dioxide is ejected from the storage container, it will quickly vaporize from the liquid into gas, and absorb some heat from the surrounding area to cool down.

Baidu encyclopedia-carbon dioxide fire extinguisher