Fire extinguisher pressure gauge? Fire extinguisher gauge color meaning

Fire extinguisher is one of the common fire protection facilities, fire or may take place in public places, is designed for different fire alarm. However, the pressure gauge on the fire extinguisher can you see? Small make up today to share the fire extinguisher pressure gauge and its color. 1. Pointer in the red areas shows the pressure is too low, can't, have failed and need to be replaced or filling ( Regular fire equipment store should be to back filling powder; 2. Pointer is normal in the green area, can be normal use; 3. Pointer in Huang Ge area shows the pressure is too big, can spray powder, but is in danger of blasting, explosion, but it doesn't mean the invalid when using! Such a state of fire extinguisher, also had better get a formal back filling dry powder fire equipment store. Each fire extinguisher has his own work pressure, pressure is too high too low will affect the use, to check the fire extinguisher around you, don't let it fail!