Positive compressed air breathing apparatus is used in the industry of fire protection, chemistry, shipping petroleum, coal gas, smelt, and storage, etc. The rescuer may work safely by it at the area of smotheration poison gas, and lacking oxygen. Features: 1) This product accord with the standard requirement in GA124-1996 Positive Compressed Air Breathing Apparatus 2) The air container is less weight and more capacity 3) There is an alarm on it; it will make sound as leaving signal under stated cylinder pressure 4) The mark is designed under anthrop o-engineering theory. The single sealed glass of mask has a large visual field. The mask is sealed by repeater is installed on mask which may be used for calling 5) Simple operation and comfortable wearing Technical specifications: 1) Air cylinder pressure (max.): 30MPa 2) Positive pressure airflow (max.): 300L/min 3) Pressure in mask (min.): >0 4) Residual air alarm pressure: 4 - 6MPa 5) Inhalation resistance (max.): 588Pa 6) Air cylinder volume: 6.8L 7) Use time: 60 min 8) Use environment temperature: -30 Celsius degrees to 60 Celsius degrees 9) Total mask air leakage modulus: less than 0.005 10) Product weight: less than 10kg