Water extinguishers
Water is one of the most familiar materials for extinguishing fire. But if it is not used correctly, it can be more dangerous than fire. With a fire extinguisher that works with water, you can put out a fire caused by wood, paper or cardboard.
But if the fire was caused by electricity or if flammable liquids caused the fire, water is not an effective way to control it because water can conduct electricity and cause electrocution. Also, flammable liquids are spread around by water and cause fire to spread.
🔰 Extinguishers containing powder
The best types of fire extinguishers are powders, which are mostly made of sodium bicarbonate, potassium bicarbonate or monoammonium phosphate. When potassium bicarbonate reaches a temperature of 70 degrees Celsius, it starts to decompose and releases carbon dioxide. This carbon dioxide covers the fire and suffocates it.
🔰 foam extinguishers
In order to extinguish the fire of flammable liquids, this type of extinguisher is used. If it is thrown on burning materials, it quickly covers the fire and prevents the rising of flammable gas from the materials.
🔰 Extinguishers containing carbon dioxide gas
One of the most popular fire extinguishers is pure carbon dioxide. In a fire extinguisher that works with carbon dioxide, carbon dioxide is kept in the form of a liquid under high pressure in the cylinder. When the chamber is opened, the carbon dioxide expands and becomes a gas in the atmosphere.
Carbon dioxide is heavier than oxygen. Therefore, it replaces the oxygen around the combustible material. These types of capsules are used in restaurants, because they do not cause contamination for food and cooking utensils.
Sprinklers
It is a ceiling device that uses water, CO2 and halogenated hydrocarbons when extinguishing a fire. It is predicted and installed from a calculated plumbing network on the ceiling and walls of workshops and halls, especially warehouses.
🔸🔹Sprinkler has nozzles on which special and temperature-sensitive alloys or small liquid or gas capsules are placed. When the ambient temperature of the alloy melts, or its capsule bursts and causes the water path to open and water or other substances are sprayed on the fire by the pressure of water, an alarm can be installed in their path to be notified of a fire.
Types of fire extinguishers
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Fatana Karamati Pashaki
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