In accordance with ga632-2006 "positive pressure fire oxygen respirator" standard.Suitable for long - term use in toxic and harmful environment.Positive pressure type, with high temperature resistance, flame retardant, anti-corrosion, waterproof, good air tightness and other properties.Use time 4 hours.

Protection performance within rated protection time:
O2 concentration in inhalation(%):>21%;
CO2 concentration in inhalation(%):0.94%;
suction temperature(ºC):34.3ºC;          Expiratory resistance(Pa):510Pa;
inhalation resistance(Pa):270Pa;
Oxygen performance:
Fixed oxygen supply:1.5L/min;            Automatic replenishment of oxygen:90 L/min;
Oxygen supply by hand:90 L/min;        Automatic supply valve opening pressure:160Pa;
Exhaust valve opening pressure:570Pa;
heat resistance:
High Pressure system air tightness:No leakage within 30 min;
Air tightness of low pressure system: its pressure drop value within 1 min:10pa;
O2 concentration in inhalation(%):>21;        CO2 concentration in inhalation(%):0.40;
suction temperature(ºC):33.4;          Expiratory resistance(pa):590;
inhalation resistance(pa):310;
Fixed oxygen supply(L/ min):1.50;
Automatic replenishment of oxygen(L/ min):90;   Oxygen supply by hand(L/ min):100;
pressure gage:
air leakage(L/ min):15.5;
Mask performance:
The total field of vision(%):82.9;
Binocular vision(%):70;             Below the horizon(°):>35;
Effective volume of air bag or breathing chamber(L):5.2;
Pressure alarm:
The intensity of sound level(dB(A)):87;          Sound time(S):50;
Maximum air consumption(L/ min):3.1;
exhalation valve:
Reverse leakage(L/ min):0.1;     Ventilation resistance(pa):10;
inhalation valve:
Reverse leakage(L/ min):0.1;     Ventilation resistance(pa):10.