What do the three colors of a fire extinguisher stand for?
The green area is the safe area, the yellow area danger zone, the red area failure area.The pointer points to the Yellow Zone, indicating that the pressure of the drive gas in the extinguisher bottle is too high and there is a certain risk.
Only in green areas for normal use.But note: at 1. 0~1. Permissible range between 4. Neither too high nor too low. It must be sent in.
If the pointer points to the red zone, it indicates that the drive air pressure is lower than the safety value. The fire extinguisher has lost the ability to fire and should be supplemented with pressure in time.
