one. Before use, check, preparation 1. Open the air bottle switch, the storage pressure in the cylinder is generally 25 to 30MPa, with the pressure rise in the pipeline, decompression system, will hear the residual pressure alarm alarm.

2. Close the cylinder valve and observe the changes in the reading of the pressure gauge. Within 5 minutes, the reading of the pressure gauge should not drop more than 2 MPa, indicating that the gas supply piping system is high in pressure and airtight. Otherwise, check the air tightness of each joint.

3. Through the lever of the supply valve, gently press the supply valve diaphragm group, so that the air in the pipeline is slowly discharged. When the pressure drops to 4~6MPa, the residual pressure alarm should give an alarm sound and continue to ring. When the gauge indicates that the value is near zero. Otherwise, it is necessary to recalibrate the alarm.

4. The pressure gauge has no damage and its connection is firm.

5. Is the medium pressure pipe aged, cracked, or leaky, and is it securely attached to the supply valve, quick connector, or pressure reducer, and is there any damage?

6. Is the supply valve action flexible and missing, and is it securely attached to the medium pressure conduit and damaged. Supply valve and exhalation valve match. Bring the exhalation device, open the cylinder switch, press the supply valve lever to make it work. When inhaling, the supply valve should be supplied with air, with a distinct "click" sound. When exhaling or holding the breath, the supply valve stops supplying air and there is no "click" sound, indicating a good match. If the supply valve is still supplied with air when exhaling or holding the breath, you can hear a "click" sound, indicating that there is a mismatch. Verify that the positive type air exhalation valve's ventilation resistance, or replace the full face mask, to match the requirements.

7. Check that the lens, tie, ring seal, exhalation valve, and suction valve of the full face cover are intact, and that the connection position of the missing part and the supply valve is correct and the connection is firm. Full-faced lenses and other parts should be clean, bright and free of dirt. Check whether the full face and face fit is good and airtight by closing the air bottle switch and inhaling it several times to exhaust the remaining air from the air respirator system. The negative pressure is maintained in the full face mask. Under the action of the atmospheric pressure, the full face mask should be moved toward the human face and it is difficult to breathe. This proves that the full face mask and the exhalation valve have good airtightness.

8. Is the air bottle firmly fastened? Is it connected to the reducer firmly and airtight? The straps and belts are intact and there are no breaks.

Second, wear and use 1. When wearing, first disconnect the quick connector (to prevent damage to the full mask when wearing), and then support the back on the human body (air bottle switch in the bottom), according to the body adjust a good shoulder strap, belt and Tighten to fit, secure, and comfortable.

2. Put the long strap on the full cover over the neck, use the full front cover on the chest before use, so that it can be worn with your sputum and then fasten the quick connector.

3. Set the transfer switch of the supply valve to the closed position and open the air bottle switch.

4. Wear a full face mask (without tying) for 2 or 3 deep breaths and feel comfortable. When holding gas or exhaling, the supply valve should stop supplying air and there is no "click" sound. Press the lever of the supply valve by hand to check if it is flexible or not. When everything is normal, tighten the full-face straps tightly to the extent that it is necessary to ensure airtightness, comfort, and no obvious tenderness.

5. After evacuating the site to reach a safe place, loosen the full face strap tie clip and take off the full face cap.

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