In emergency fire situations, knowing how to properly use a dry powder fire extinguisher can help you extinguish the fire in time, protect property, and even save lives. In this article, we provide a detailed guide covering the structure, operating principles, usage, and maintenance of dry powder fire extinguishers. We’ll also suggest reliable places to recharge your fire extinguisher so that you’re always ready to handle fire hazards.

1. What is a dry powder fire extinguisher?

A dry powder fire extinguisher is a common firefighting device that contains dry chemical powder and compressed gas to extinguish fires. It is widely used in households, offices, factories, shops, and more due to its quick and effective fire suppression and ease of use.

Types of dry powder fire extinguishers:

– ABC powder extinguishers: Suitable for fires involving solid materials, flammable liquids, and gases.

– BC powder extinguishers: Suitable for flammable liquid and gas fires (not recommended for solids like wood or fabric).

2. Structure and Operating Principle of Dry Powder Fire Extinguishers

2.1 Structure

A typical dry powder fire extinguisher includes:

– A red-painted steel cylinder with a label showing specifications and usage instructions.

– Dry chemical powder inside (either ABC or BC type).

– Compressed CO₂ or N₂ gas to generate pressure for discharge.

– Discharge valve, safety pin, nozzle, and pressure gauge.

2.2 Operating Principle

When the discharge valve is opened, the compressed gas pushes the powder out through the nozzle. The powder covers the fire surface, isolating oxygen and preventing the fire from spreading, effectively cooling and extinguishing the flames quickly.

2.3 Identifying Different Types of Powder Extinguishers

– ABC extinguisher: For solid (A), liquid (B), and gas (C) fires.

– BC extinguisher: For liquid and gas fires only.

– Common markings: MFZ2, MFZ4, MFZ8 (indicating 2kg, 4kg, 8kg of powder respectively).

3. How to Use a Dry Powder Fire Extinguisher Effectively

Follow these standard steps to use a dry powder fire extinguisher safely and efficiently:

Step 1 – Approach and Prepare

– Bring the extinguisher close to the fire (about 2–3 meters).

– Stand in the direction of the wind (if outdoors) to avoid powder blowing back into your face.

Step 2 – Shake the Cylinder (for directly pressurized types)

– Shake the extinguisher firmly 5–7 times to loosen the powder and ensure even, long-range discharge.

Step 3 – Pull the Pin and Press the Handle

– Remove the safety pin (metal or plastic).

– Hold the nozzle with one hand and squeeze the handle/valve with the other.

Step 4 – Spray the Powder Over the Fire Area

– Aim the nozzle at the base of the flames, not the flame tops.

– Sweep the nozzle side to side in a zigzag pattern, covering the entire burning area.

Note: Do not position the nozzle too close to the fire surface to avoid clumping of powder, which reduces effectiveness.

4. Important Notes When Using Dry Powder Extinguishers

– Do not let powder contact your eyes, nose, or mouth; avoid direct inhalation.

– Only use powder extinguishers on small, newly started fires. For large or spreading fires, evacuate immediately and call professional fire services.

– Avoid spraying powder on active electrical equipment for extended periods, as it may cause short circuits later (use CO₂ or specialized powder extinguishers for electrical fires).

5. Inspecting and Maintaining Dry Powder Fire Extinguishers

5.1 Regular Inspection

– Every 6 months: Check the pressure gauge.

– If the needle points to the red zone (below safe level) → recharge the gas.

– Check the seal, valve, nozzle, and shake the cylinder to ensure the powder is not caking.

5.2 Proper Storage

– Store the extinguisher in a visible, accessible location near fire-prone areas.

– Avoid direct sunlight, high temperatures (>55°C), or corrosive environments.

– Do not subject the extinguisher to strong impacts or leave it tilted for long periods.

Mastering the use of dry powder fire extinguishers and conducting regular checks and maintenance will help you proactively handle emergencies and ensure the safety of your family, staff, and property.

Contact A-connection now via hotline 0968 68 8081 for:

– Free consultation on dry powder fire extinguishers.

– Fast quotes for refilling/recharging fire extinguishers.

– Scheduling regular inspection and maintenance.