Manual powder fire extinguisher and CO2 powder extinguisher

We would like to guide you how to use the CO ₂ powder and fire extinguisher fire extinguishers in a complete, detailed and safe way through the following article.

1. CO2 fire extinguisher: MT3 (3kg CO2) - MT5 (5kg CO2) .

a) Structure

Structure of CO2 fire extinguisher.

b) Uses

- CO2 fire extinguisher is a portable fire extinguisher inside CO ₂ -79 ⁰ C gas that is compressed with high pressure, used to extinguish newly arising small fires: Solid, liquid fire and high efficiency for electric equipment fire, fire in closed room, cellar chamber. How to use and manipulate simple and convenient.

c) How to use and the principle of fire fighting

When a fire occurs, carry a CO ₂ bottle to reach the fire, one hand holding the sprayer to direct the fire to at least 0.5m and the other to unlock the valve. When opening the average valve, due to the difference in pressure, the liquid CO2 in the tank escapes through the diving tube system and the sprayer is converted into the form of carbon dioxide, cold to -79 ^° C. CO2 has the effect of diluting the concentration of combustible gas vapor and cooling the burning area, leading to the destruction of the fire.

Attention:

1. Read the instructions, grasp the effectiveness of each type of bottle to arrange the fire accordingly.
2. When spraying right off, stop spraying.
3. When extinguishing the liquid fire must spray on the surface of the fire, avoid spraying down the liquid.
4. When spraying depends on each fire, choose the location and distance to spray accordingly.
5. Do not use jars to stamp out outdoor fires. If used, when spraying, choose the wind direction.
6. Precautions burn cold. Only hold on plastic, rubber on nozzle and spray speaker.
7. Before spraying in the room, tell everyone to leave the room, to make an exit plan after spraying.

d) Precautions when using CO ₂ storage

1. Do not use CO2 tanks to cure fires with alkaline metals, alkaline earth, coke, nitrogen fertilizer. Because when spraying CO2 into a fire will produce a chemical reaction, in that reaction will produce CO gas that is both toxic and dangerous to fire, causing the fire to develop more complex.

CO ₂ + C = 2CO; CO ₂ + M = MO + CO

1. When spraying, you must hold the plastic part of the sprayer, avoid holding the metal part and especially not letting CO ₂ spray on people will cause cold burns. Do not use CO ₂ cylinders to cure fires in an empty place, with strong winds because of low efficiency.
2. When fighting high voltage electrical equipment, they must wear insulated boots and gloves; Fire fighting in closed rooms must have measures to ensure safety for people.
3. Place the bottle in a cool, easy-to-see place, easy to take, convenient to use. Do not leave the container in a place where the temperature is higher than 55 ⁰ C, causing a pressure increase, leading to an explosion if the safety valve does not work.
4. Regularly check, maintain and replace if there is any damage to the parts of the tank: Sprayer, nozzle, valve lock. Replace the tank with gas leaks.
5. Method to check the amount of CO2 in the bottle: Popular is the method of weighing, if you see that the amount of CO2 reduced compared to the original amount of CO2 is the gas leak.

2. Fire extinguishers

a) Structure

Structure of fire extinguishers.

b) Uses

Powder fire extinguisher is an internal N2 fire extinguisher as a thrust for spraying powder to extinguish the fire. Depending on each type of fire extinguisher, it is possible to extinguish fires of solid, liquid, burning gas, electric fires and newly arising electric equipment. Fire-fighting powder is non-toxic, non-conductive and highly effective; manipulate the use of simple, easy to check and use to fire small, newly arising fires.

The letters A, B, and C on the jar show the extinguisher's extinguishing ability for different fires. Specifically:

1. A: Treating solid fires such as wood, cotton, fabric, fiber .
2. B: Cure liquid fires such as gasoline, alcohol, alcohol .
3. C: Treatment of gas fires such as gas (liquefied gas), .

The numbers 2, 4, and 8 show the weight of the powder loaded in the flask, in kilograms.

For example: A fire extinguisher with the symbol MFZ8 indicates that ABC is a fire extinguisher that can be used to fire most of the fires of solids, liquids, inflammable gases .

c) Usage

* For portable type: When there is a fire, there should be a bottle coming to the fire place. Shake the jerky from 3-4 times to dough, pull the lead clamp, select the wind direction to direct the speaker to the fire base. Keep the bottle at a distance of 1.5m depending on the type of bottle, squeeze the valve to spray fire extinguisher, when the gas is weak, approach and bring the speaker back and forth to completely extinguish the fire.

* For trolley trucks:

1. Push the car to a fire place, pull the hose rulo to lead the powder, direct the powder to spray the original fire.
2. Safety latch (lead clamp), pull the main valve on the pitcher mouth perpendicular to the ground.
3. Hold the prism tightly and choose the wind direction and pull the trigger, the powder will be sprayed out.

When opening the valve (depending on the type of bottle with different valve structure, different ways of opening) dry powder in the bottle is sprayed out by the push of compressed air (compressed directly with powder or in separate bottles) through the pipe system guide. When spraying on powder fire, it helps to inhibit the combustion reaction and isolate the combustion substance with air oxygen, on the other hand prevent burning gas vapor into the burning area, leading to the fire being extinguished.

Attention:

1. Read the instructions, master the effect of each type of bottle to arrange the bottle accordingly.
2. When spraying, stand at the top of the wind direction (outside fire);standing near the door (burning inside).When spraying right off, stop spraying.
3. When extinguishing liquid fires, spray fire extinguishers on the surface of the fire, avoid spraying directly on the liquid to prevent them from shooting out, burning bigger.
4. When spraying depends on each fire and the amount of push gas remaining in the bottle that selects the location and distance of spraying accordingly.
5. Used fire extinguishers should be kept separate from confusion.
6. When spraying keep the bottle in an upright position.

d) Attention points when using fire extinguishers

1. To make it easy to see, easy to get convenient for fire fighting.
2. Set in a dry, well-ventilated place, avoid places with strong sunlight and heat radiation, the highest temperature is 500C.If left outside the house must be covered.
3. When moving should be gentle.Avoid direct contact with high temperatures, vibration equipment.
4. Regularly check the bottle according to the manufacturer's regulations or at least once every 3 months.If the needle is just below the red line, the gas must be reloaded.
5. Check the propellant through the manometer or balance and compare it with the initial mass.Check powder mass by weighing comparisons.
6. Regularly check, maintain and replace if there is any damage to the parts of the tank: Sprayer, nozzle, valve lock.Replace the tank with gas leaks.