Firefighters or rescue workers use it in toxic or harmful gas environments, environments containing harmful substances such as smoke and dust, and environments with oxygen deficiency, providing effective respiratory protection for users. It is widely used in fire protection, power, chemical, ship, smelting, warehouse, laboratory, mine and other departments. Air respirators are mainly used in fire protection, chemical industry, metallurgy, shipbuilding, petroleum and other industries. It is provided for fire fighters or rescue and relief personnel to effectively carry out rescue and rescue work in an environment with toxic gas, smoke, dust or oxygen deficiency. Technical parameters of RHZK6.8 air respirator 1. Effective protection time 60min 2. High working pressure 30Mpa 3. Cylinder volume 6.8L 4. Air supply flow>300L/min 5. Alarm pressure 5.5 ± 0.5Mpa 6. Operating weight <11KG