What does the pressure gauge pointer indicate for normal pressure in a fire extinguisher
1 Answers
The pressure gauge pointer of a fire extinguisher indicates normal pressure when it is in the green zone. The normal pressure value of a fire extinguisher is approximately between 1.2—1.5 MPa. If the pointer is in the red zone, it means the pressure inside the cylinder is insufficient, indicating the fire extinguisher cannot be used normally. If the pointer is in the yellow zone, it indicates overpressure, meaning the pressure is too high and poses a potential danger (however, slight overpressure may still be considered normal). Relevant information about fire extinguishers is as follows: 1. Introduction: A fire extinguisher, also known as a fire cylinder, is a portable firefighting tool. It contains chemicals used to extinguish fires. The fire extinguisher is a sturdy metal cylinder filled with water or fire-extinguishing materials. 2. Working Principle: When the lever at the top of the cylinder is pressed, the high pressure generated forces the extinguishing agent inside the cylinder out, similar to how a spray can ejects its contents. The function of a fire extinguisher is to displace air, depriving the fire of oxygen and thus extinguishing it.