Breathing air compressor is the smallest portable positive pressure air respirator filling pump, with the smallest volume and lightest weight in the market, which can be easily put into the car trunk. The compressor uses four-stage compressor to compress, with the highest compression efficiency, uses activated carbon molecular sieve overweight filter, the breathing air produced is pure and odorless, in line with EU EN12021 Standard. Armed police fire, chemical, power, grain depot, diving, petrochemical, mining, municipal and other purposes.