At what position of the pressure gauge needle is the pressure normal for a fire extinguisher?
2 Answers
The pressure is normal when the needle of the fire extinguisher's pressure gauge is in the green zone. Here is more information about fire extinguishers: 1. The normal pressure value of a fire extinguisher is approximately between 1.2—1.5 MPa. If the needle is in the red zone, it indicates insufficient pressure inside the cylinder, meaning the fire extinguisher cannot be used normally; if it is in the yellow zone, it indicates overpressure, which can be dangerous (though a slight overpressure may still be considered normal). 2. A fire extinguisher, also known as a fire cylinder, is a portable firefighting tool. It contains chemicals that work by displacing air, depriving the fire of oxygen to extinguish it. Since carbon dioxide is a gas and leaves no residue, it is used in fire extinguishers to avoid damaging equipment.
When I check the fire extinguisher at home, I make sure the pressure gauge needle is in the green zone, which indicates normal pressure. This green zone is like a green traffic light, meaning everything is fine and the extinguisher is ready to use. If the needle drops into the red zone, the extinguishing agent may lack pressure and won’t discharge in case of a fire, posing a serious risk. Conversely, if it’s in the high yellow zone, excessive pressure could cause an explosion or leakage. So, I make it a habit to glance at the gauge every month to ensure the needle stays firmly in the green range. Also, don’t forget that fire extinguishers usually have labels indicating the specific range—reading them carefully is even better. Temperature changes can also affect pressure; in winter, cold weather might temporarily lower it, so keeping it in a warmer spot indoors is ideal. Regular maintenance is key—don’t wait for an emergency to regret not checking.
