The use of dry powder fire extinguishers seems to be five words.

The use formula of fire extinguisher: look, lift, pull, aim and press.

First, "look" to see if the dry powder has expired. Check whether the pressure gauge pointer is in the green area. See if the tank is out of date (there will be security risks).

Second, "lift" the fire extinguisher and rush to the fire, and put it down about 5 meters away from the fire source.

Third, unplug the lead seal and safety pin.

Fourth, "aiming" aiming is aiming. Raise the fire extinguisher in your right hand and aim the nozzle at the root of the flame in your left hand.

5. Press and spray the handle with your right hand, aim at the seedling root (press it to the bottom, don't let go in the middle), and swing it left and right to cover the root of the flame until the flame is completely extinguished!

Dry powder fire extinguishers are portable and pressure stored. Its properties can be divided into ordinary (BC) and ordinary (ABC) dry powder. The dry powder in the dry powder fire extinguisher barrel is sprayed from the nozzle under pressure when in use. Dry powder fire extinguishers are suitable for extinguishing liquid fires and live equipment fires, especially gas fires. This is unmatched by other fire extinguishers. It can also put out instrument fires, but it is not suitable for precision instrument fires that leave powder after extinguishing.

Extended data:

Advantages and disadvantages of dry powder fire extinguishing;

1. The main component of dry powder fire extinguisher is sodium bicarbonate, that is, baking soda and diammonium hydrogen phosphate are the main raw materials.

2. The applicable temperature of dry powder fire extinguisher is above -23℃. When the temperature exceeds -23℃, the fire extinguishing is abnormal or can't be used at all.

3. Although the dry powder fire extinguisher can be used for Class A fire, it can only control the fire, can't put it out, and is easy to rekindle.

4. The dry powder fire extinguisher is sprayed as powder, which blocks the fireman's sight and seriously affects the fireman's breathing, so it can't be used normally.

5. After the dry powder fire extinguisher was sprayed, the scene was a mess, and the sprayed substances were difficult to clean up, causing serious economic losses.

6. If the dry powder fire extinguisher vibrates for a long time, the agent is easy to harden and get damp, so it cannot be used.

References:

Baidu encyclopedia-dry powder fire extinguisher