Positive pressure fire air respirator(self contained breathing apparatus) is a self-contained open fire fighting air respirator, which is mainly applicable to fire fighting, chemical industry, ships, petroleum, smelting, factories and mines, laboratories, etc., so that firefighters or rescue workers can safely carry out fire fighting, rescue and relief work and rescue work in a harsh environment full of smoke, toxic gas, steam or oxygen deficiency.

1. When wearing, first disconnect the quick connector (to prevent damage to the full face cover during wearing), then place the back on the back of the human body (with the air bottle switch below), adjust the shoulder and waist straps according to the body shape, and fasten them tightly for a snug, secure, and comfortable fit.

2. Put the long strap on the full face mask around the neck, place the full face mask on the chest before use for easy suction and wearing, and then connect the quick connector.

3. Place the switch of the supply valve in the closed position and turn on the air bottle switch.

4. Wear a full face mask (no need for straps) and take 2-3 deep breaths to feel comfortable. When holding or exhaling, the supply valve should stop supplying air without any "sizzling" sound. Press the lever of the supply valve with your hand and check if it opens or closes flexibly. When everything is normal, tighten the straps of the full face mask to ensure airtightness, comfort, and no obvious tenderness.

5. After evacuating the scene and arriving at a safe place, loosen the strap clip of the full face mask and remove the full face mask.

6. Turn off the gas cylinder switch, open the supply valve, unplug the quick connector, and remove the respirator from the body.