What are the characteristics of the three types of extinguishers?
Dry powder fire extinguisher: suitable for fighting fire of petroleum products, paint and organic solvent. It can suppress the chain reaction of fire and extinguish fire. Also suitable for extinguishing liquid, gas, electrical fire (dry powder has more than 50 thousand volts of electrical insulation performance). Some can also fight solid fires. Dry powder fire extinguishers can not fight light metal fires.
Foam extinguisher: foam can cover the surface of the fire to prevent air from entering. It is most suitable for fighting liquid fires, and can not fire water soluble flammable and flammable liquids (such as alcohols, esters, ethers, ketones, etc.) and electrical fires.
Carbon dioxide extinguisher: carbon dioxide extinguishers are carbon dioxide gas stored at high pressure in the air cylinder as the fire extinguishing agent, carbon dioxide fire after leaving no trace, suitable for fighting large equipment, archives, computer room fire, it is also suitable for conducting extinguishing electrified low-voltage electrical equipment and oil fire, but is not available it saves potassium, sodium, magnesium, aluminum and other material fire.
