At which position of the pressure gauge pointer is the pressure normal for a fire extinguisher?
3 Answers
The pressure gauge pointer of a fire extinguisher indicates normal pressure when it is in the green zone. When the pointer points to the red section, it means the pressure inside the cylinder is insufficient, and the fire extinguisher cannot be used normally. When the pointer points to the yellow section, it indicates excessive pressure, which can be dangerous. When the pointer is in the green section, it shows that the fire extinguisher is functioning properly. Additional information: 1. Class A fires refer to fires involving solid materials, such as wood, fabric, paper, rubber, and plastic. 2. Class B fires refer to liquid fires and fires involving meltable solid materials, such as flammable liquids, asphalt, and paraffin. 3. Class C fires refer to gas fires, such as those caused by coal gas, natural gas, methane, and hydrogen. 4. Class D fires refer to metal fires, such as those involving potassium, sodium, and magnesium.
When the pressure gauge needle of a fire extinguisher is in the normal state, it usually points steadily to the green zone. This green area is located in the middle of the dial, indicating that the pressure is at an ideal level—neither too low nor too high. I often check this myself while working in the workshop because if the needle drifts into the red zone, whether it's low or high pressure, it means the fire extinguisher may be ineffective or unsafe. If the pressure is too low, the extinguishing agent won't discharge; if it's too high, the cylinder may risk bursting. Developing a regular habit, such as glancing at the dial every month, ensures it's always ready for use. Don’t underestimate this detail—my home fire extinguisher is always under my watch, and green is the sign of safety. Safety first—a small action can prevent big trouble. Keep the fire extinguisher in an easily accessible location for convenient checks.
From a safety perspective, the normal pressure position for a fire extinguisher is when the needle falls within the green zone. The design is intuitive—green signals 'OK,' indicating moderate pressure. Once the needle drifts into the yellow or red zone, it's time to be alert. Low pressure may render the extinguishing agent ineffective, while high pressure could lead to accidents. As a parent, I always remind my children to pay attention to this and have even established a family fire extinguisher inspection plan, personally verifying it's in the green every month for peace of mind. Remember, this isn't just about equipment status—it's about being able to save lives in critical moments. In daily life, don't wait for an accident to regret negligence. Fire extinguisher maintenance is simple—just glance at the gauge. Don't slack off. Safety is no trivial matter; keeping it green ensures protection.
