How to maintain portable powder extinguishers and smoke extinguishing systems?

(1) The ambient temperature for storage is within the range of 110-45 °C.

(2) Check the storage of carbon dioxide once a year. The inspection method is to unscrew the steel cylinder (do not detach the steel valve from the cylinder to avoid danger) and weigh it. The mass obtained after weighing minus the mass of the cylinder is the mass of carbon dioxide gas in the cylinder (g).

(3) Check whether the needle threading and moving parts in the head are flexible.

(4) It should be stored in a dry environment, and the dry powder should be checked once a year for agglomeration. If there is agglomeration, it should be replaced in time. Moisture-proof measures must be taken when it is placed in the open air.

(5) The storage place should be cool and ventilated, and it should not be exposed to sunlight or baked under strong radiation to prevent the expansion of carbon dioxide gas due to temperature rise and cause air leakage.

(6) Check whether the powder outlet pipe, air inlet pipe and nozzle are blocked by lumps, and whether the film inside the moisture-proof plug on the powder outlet pipe is broken.

(7) Check whether the needle threading needle is in the correct position of the head and whether the head nut is tightened, so as to avoid the dry powder agglomeration caused by air leakage.

(8) Dry powder fire extinguisher with pressure indicating device should be pressurized in time when the pointer drops to the red area.