In which zone should the pressure gauge needle of a fire extinguisher be for normal operation?
2 Answers
The pressure gauge needle of a fire extinguisher indicates normal operation when it is in the green zone. Here is some information about fire extinguishers: 1. The fire extinguisher pressure gauge is divided into three sections: The first section is the red zone, where the needle indicates that the dry powder pressure inside the extinguisher is too low to discharge, rendering it ineffective; the second section is the green zone, where the needle indicates normal pressure, allowing for proper use; the third section is the yellow zone, indicating that the dry powder pressure inside the extinguisher is too high, which can discharge the powder but poses a risk of rupture or explosion. 2. Precautions for using fire extinguishers: Do not exceed the usage range indicated by the gauge; the normal operating temperature range for the pressure gauge is -20℃ to +55℃.
Regarding the normal range of the fire extinguisher pressure gauge needle, I must say it indicates proper functioning only when it's within the green zone. As someone frequently involved in equipment maintenance, I've examined numerous dials on fire extinguishers, which typically feature three colored sections: red, yellow, and green. Red signifies either insufficient or excessive pressure, posing potential hazards; yellow is a warning zone, indicating marginal usability but lacking reliability; while green represents the safe operating range. A steady needle in the green zone confirms the canister is properly pressurized and ready for immediate use. Should the needle drift into red or yellow zones, don't take it lightly – this could mean gas leakage or internal malfunctions, rendering the extinguisher ineffective during a fire emergency. I recommend monthly gauge inspections: gently shake the canister to observe if the needle drops rapidly. Any abnormality warrants prompt professional attention – never compromise on replacement or repair costs. Remember, fire extinguishers are emergency devices; keeping the needle in the green zone ensures reliability. Failure to do so risks critical malfunction when you need it most.
