Where Should the Needle on a Fire Extinguisher's Pressure Gauge Point to Indicate Normal Pressure?

[KimberlyRose]

Here is an introduction to the areas indicated by the needle on a fire extinguisher's pressure gauge: 1. The needle pointing to the green zone indicates normal pressure: the pressure value is approximately between 1.2 to 1.5 MPa. 2. When the needle points to the red zone: it indicates insufficient pressure inside the cylinder, rendering the extinguisher unusable and requiring replacement. 3. When the needle points to the yellow zone: it indicates excessive pressure, which poses a risk of danger, and the extinguisher should be sent to a specialized agency for inspection and repair. Additional information: 1. The pressure gauge is a crucial indicator for determining whether a fire extinguisher can be used normally, so it should be observed frequently and inspected and maintained regularly. 2. Once a fire extinguisher is activated, even if only a small amount is discharged, it must be refilled according to the specified requirements. This should be done by a professional maintenance department following the manufacturer's guidelines and methods. Alterations to the type of extinguishing agent, its weight, or the pressure of the propellant gas should not be made arbitrarily.