Dry powder extinguisher needle refers to yellow green red what is it?
Huang Lvhong mainly pressure indicators in the fire extinguisher. Yellow is where the pressure is greater than a certain safety zone. Green means that the pressure of the extinguisher is normal and can be used safely. Red means the lack of pressure and the use has no effect.
Yellow is relatively safe, that is, the pressure is somewhat unsafeGreen safe useRed hazard recommended change not used
Huang Lvhong mainly refers to the pressure indicators in the fire extinguisher. Yellow is relatively safe, that is, the pressure is somewhat unsafe. Green means safe use. Red means danger. Suggest change. Don't use it. There may be an explosion or lack of pressure. It may not be ejected while using.
