系统工作原理是:利用氮气瓶组内的高压氮气经减压阀减压后，使氮气进入干粉罐，其中一部分被送到罐的底部，起到松散干粉灭火剂的作用。随着罐内压力的升高，使部分干粉灭火剂随氮气进入出粉管被送到干粉炮，干粉枪或干粉固定喷嘴的出口阀门处，当干粉炮、枪或干粉固定喷嘴的出口阀门处的压力到达一定值后(干粉罐上的压力表值达1.5~1.6MPa时)，打开阀门(或者定压爆破膜片自动爆破)，将压力能迅速转化为速度能，这样高速的气粉流便从干粉炮(或干粉枪，固定喷嘴)的喷嘴中喷出，射向火源，切割火焰，破坏燃烧链，起到迅速扑灭或抑制火灾的作用。

The principle of work for DCP system: Releasing the high pressured Nitrogen from Nitrogen Cylinder to Reduction Valve and decompresses the pressure to the work pressure, then transport them into Powder Tank, amount of them are transported to the bottom of the tank to relax the powder. Along with the tank's contenting pressure update, some powders are transfer to the discharge pipe and arrive at the valve bellowing the powder monitor / powder gun or powder nozzle along with the pressured Nitrogen, when the pressure in the valve arrives at the rated pressure (or the pressure gauge on the tank indicate 1.5~1.6MPa), open the valve (or the breakable diaphragm breaking auto.), then the pressure energy are translated to speed energy, high speed powder spray out from monitor (gun or nozzle ), shot at the fire, incise the flame, destroy the burning chain, then stifle the fire quickly.