Characteristics of foam fire extinguishers

The characteristics of the foam fire extinguisher. The foam fire extinguisher is one of the types of extinguishers used in fire extinguishing and has its own functions and characteristics. Foam fire extinguishers, as the name suggests, use fire extinguisher foam to put out the fire. Due to its low density, this foam covers the surface of the fire and thus prevents oxygen from reaching flammable materials and the rise of gases produced in the fire. Also, the low weight of the foam prevents it from being washed away, so it has enough time to extinguish the fire. In this article, we mention the features of foam fire extinguishers. The characteristics of the foam fire extinguisher. The body of the chemical foam extinguisher is made of carbon steel with epoxy coating, and its nozzle has ventilation holes. This capsule has a pressure gauge, a rating label, a mark to show the amount of charge and a plastic or metal refill. Its chemical structure includes diluted surfactant, anti-corrosive substances, organic solvents such as hexylene glycol, lauryl wood for firefighting foam production and foam stabilizer. The capacity of the foam fire extinguisher is usually 9 liters, and the ratio of foam and water is 1:8, so that for every 8 liters of water, there is 1 liter of foam in this capsule. An important issue with fire extinguishers is their throwing power. The throwing power of this type of fire extinguisher is about 5 meters. The contents of fire extinguisher foam fire extinguisher foam used in fire extinguishers can be of different types; Protein foam is produced from fermentation of non-edible animal waste or hydrolysis of plant and animal protein compounds in pressurized reactors at high temperature. The firefighting foam that is made on the basis of protein is environmentally healthy and environmentally friendly. Chemical firefighting foam is made by reacting foaming chemicals with fluorine and covers the fire surface by producing large bubbles. The use of foam fire extinguishers. Different fire extinguishers are suitable for extinguishing fires of different categories. This classification is specified in the form of English letters, such that category A includes common solid materials such as wood, paper, cloth and cardboard, category B includes flammable liquids such as gasoline, category C includes gases, D flammable metals, and E electrical equipment. and F includes oils. The foam fire extinguisher is suitable for extinguishing A and B category fires. This capsule suppresses fire by creating a barrier between fuel and oxygen and also by using its cooling effect. Due to the fact that a high percentage of the content of this capsule is water, this capsule cannot be used in very intense fires. The color of the foam fire extinguisher. Fire extinguishers have different types in terms of content, and in order to distinguish them from each other, each type of fire extinguisher is identified with a band of its own color. The color of the foam fire extinguisher is red and there is a cream or lemon colored strip on it. Fire extinguishers of other types can have blue, white and black stripes.