Which is expired, red or green? Which is not expired?
The green dial on the fire extinguisher shows the red, green and yellow colors that are specific to the pressure in the display bottle, rather than to show whether it is overdue or not. Expired shows generally have a label, nameplate or stamp date. Foam filled carbon dioxide each year to replace a dry powder, every three years change once, before the deadline, the show is to see the pressure gauge, the pressure in the tank is best illustrated in the red zone, the green line is that low pressure needs to be replaced in the Yellow line.
Therefore, red, yellow and green indicate the pressure of fire extinguishers to store chemicals, not to show that they are not expired. But if the pointer is not in the green area, consider replacing it. There is usually a date mark on the bottle or extinguisher nameplate.
Usually the fire extinguisher on hand pointer of the small circular glass inside the corresponding area has three colors, green areas represent normal, lack of red arearepresents pressure, spray out agent, yellow area represents the pressure is too big, there is danger, not suitable for use.
