The pointer in the normal area of the pressure gauge of the dry powder fire extinguisher shall point to the green area. The pressure gauge of dry powder fire extinguisher is divided into three parts: red area, green area and yellow area. When the pointer points to the red area, it means that the fire extinguisher can not be used and needs to be replaced or repaired. When the pointer points to the yellow area, it means that the pressure of the fire extinguisher is too high and it is generally not recommended to use. The pointer in the normal area of the pressure gauge of the dry powder fire extinguisher shall point to the dry powder fire extinguisher, which is mainly used to extinguish the initial fire of flammable liquids such as oil, organic solvents, combustible gases and electrical equipment.
Dry powder fire extinguishers can be divided into three types according to the mode of movement: portable, backpack and cart.
The dry powder fire extinguisher shall be placed in a dry, cool and ventilated environment and in a place convenient for access. （GanFenMieHuoQiYaLiBiaoZhengChangOuYuZhiZhenYingZhiXiang）