At which position of the pressure gauge pointer is the pressure normal for a fire extinguisher?
1 Answers
The pressure of a fire extinguisher is normal when the pressure gauge pointer is in the green zone, with the normal pressure value typically ranging between 1.2—1.5 MPa. If the pointer is in the red zone, it indicates insufficient pressure inside the cylinder, meaning the fire extinguisher cannot be used normally. If the pointer is in the yellow zone, it indicates overpressure, which can be dangerous (though slight overpressure may still be considered normal). Here is some additional information: 1. Combustion Reaction: Fire is a chemical combustion reaction, usually caused by the reaction between oxygen in the air and certain fuels such as wood or gasoline. Of course, wood and gasoline do not spontaneously combust simply by coming into contact with oxygen; combustion reactions only occur when the fuel is heated to its ignition temperature. 2. Introduction to Fire Extinguishers: A fire extinguisher, also known as a fire canister, is a portable firefighting tool. It contains chemicals designed to extinguish fires. The fire extinguisher consists of a sturdy metal cylinder filled with water or fire-extinguishing materials. When the lever at the top of the cylinder is pressed, the high pressure generated forces the extinguishing agent out of the cylinder, similar to how aerosol cans spray materials. The function of a fire extinguisher is to displace air, depriving the fire of oxygen and extinguishing it. Since carbon dioxide is a gas and leaves no residue, it is used to extinguish fires without damaging equipment.
