A, dry powder fire extinguisher:

It is mainly used to put out oil fires and initial fires of electrical equipment. ? Usage: Lift the fire extinguisher, hold the nozzle tightly with one hand, aim at the fire point, and pull the cylinder pull ring with the other hand to spray powder mist.

Second, 12 1 1 fire extinguisher:

Mainly used to put out the initial fire of oil, chemical raw materials, flammable liquids and electrical appliances. ? Usage: Hold the nozzle tightly with one hand, pull out the safety pin above the steel cylinder with the other hand, aim the nozzle at the bottom of the fire source, and press the handle to spray it.

Three, carbon dioxide fire extinguisher:

Mainly used for the initial fire of electrical equipment. ? Usage: In case of fire, hold the bell mouth with one hand, aim at the ignition point, and turn on the plum blossom wheel switch with the other hand to spray carbon dioxide. When the liquid is sprayed out of the ground, the temperature drops to MINUS 78 degrees. Do not touch the metal conduit with your hands to avoid frostbite.

Selection of fire extinguisher

1. Choose according to the type of fire in the configuration site: the fire extinguisher is equipped with different types of extinguishing agents, and it is set according to different fire types. For example, dry powder fire extinguishers can extinguish Class A, B and C fires, foam extinguisher can extinguish Class A and B fires, and carbon dioxide fire extinguishers can extinguish Class B and C fires.

2. According to the fire extinguishing effect, two or three kinds of fire extinguishers can be used to extinguish similar fires, with different effects. For example, when putting out a fire, if carbon dioxide and foam extinguisher are used, more fire extinguishing dosage is needed and the fire extinguishing time is longer, while using dry powder fire extinguishing agent is not only less in dosage, but also shorter in time, which is a better choice.

3. Choose according to the degree of pollution to the protected articles: after the fire extinguisher is used, it will leave fire extinguishing agent residues on the site, such as water stains, foam, dust and other pollution, which will affect expensive equipment and precision instruments, so you can't choose it, while carbon dioxide and halon have the characteristics of high efficiency and cleanliness, which will protect high-value articles.

4. Choose according to the ambient temperature of the set point: different fire extinguishing agents have requirements for the ambient temperature. If the temperature is lower than 5 degrees, you should choose water-based and foam extinguisher with antifreeze, or dry powder and carbon dioxide fire extinguishers, which can be used and stored in an environment around 0 degrees.

5. Choose according to the quality of users: the weight of fire extinguishers varies from one kilogram to dozens of kilograms. At this time, you can choose according to the age and physical strength of the user. Factories can be equipped with larger fire extinguishers, and schools and nursing homes should be equipped with smaller fire extinguishers.