What is the purpose of the breathing bag in a BG4 system?

The breathing bag in a BG4 system serves as a reservoir for breathing air, allowing for a consistent and regulated flow of air to the user during respiration. This design is critical because it helps ensure that the individual has an adequate supply of breathable air, particularly in environments where air quality may be compromised.

As the user exhales, the breathing bag expands and stores the exhaled air, creating space for the next inhalation. This mechanism helps maintain a steady supply of air while accounting for the varying demands of breathing that can occur during physical exertion or when the user is under stress. The breathing bag plays a vital role in the overall efficiency and performance of the breathing apparatus, enhancing safety and effectiveness during mine rescue operations.