Sodium bicarbonate dry powder fire extinguishing equipment is suitable for the initial fire of flammable, flammable liquids, gases and live equipment; in addition to the above-mentioned types of fires, the ammonium phosphate dry powder fire extinguisher can also extinguish the initial fire of solid substances. But neither can save the metal burning fire. When extinguishing a fire, you can carry the fire extinguisher on your hand or shoulder to the fire, and put down the fire extinguisher about 5 meters away from the burning place. If you are outdoors, you should choose to spray in the upwind direction. If the dry powder fire extinguisher used is externally stored, the operator should hold the spray gun with one hand and lift the open lift ring on the gas cylinder with the other hand. If the opening of the gas cylinder is handwheel, unscrew it counterclockwise and turn it to the highest position, then lift the fire extinguisher. When the dry powder is sprayed, quickly align with the root of the flame. If the dry powder fire extinguisher used is a built-in gas cylinder or a pressure storage type, the operator should first unplug the safety pin on the opening handle, then hold the spray nozzle at the front end of the spray hose, and the other hand will open the pressure handle. Press down and turn on the fire extinguisher to extinguish the fire. When using a fire extinguisher or a pressure storage type fire extinguisher with a spray hose, the handle should always be pressed in one hand and cannot be released, otherwise the spray will be interrupted. When dry powder fire extinguishing equipment is used to extinguish a flammable or flammable liquid fire, it should be directed at the flame to be fired. If the fired liquid fire is burning, it should be pointed at the root of the flame and swept left and right until the flame is extinguished. If the flammable liquid is burned in the container, the user should sway the left and right sides of the flame to make the sprayed dry powder flow cover the entire open surface of the container; when the flame is driven out of the container, the user should continue to spray until the flame is extinguished. . When extinguishing a flammable liquid fire in a container, care should be taken not to directly align the nozzle with the liquid surface to prevent the impact of the jet from splashing out the flammable liquid to expand the fire, which makes the fire extinguishing difficult. If the burning time of the flammable liquid in the metal container is too long, the wall temperature of the container is higher than the self-ignition point of the flammable liquid, and it is easy to cause re-ignition after the fire extinguishing. If it is combined with the foam fire extinguisher, the fire will be extinguished. The effect is better. When using an ammonium phosphate dry powder fire extinguisher to save a solid combustible fire, it should be sprayed at the most violent place, and sprayed up and down and left and right. If the conditions permit, the user can spray the fire extinguisher along the four sides of the burning material, so that the dry powder fire extinguishing agent is evenly sprayed on the surface of the burning object until the flame is completely extinguished. ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsirvalves.com