What is the pressure output of the pressure reducer used in mine rescue systems?

The pressure output of the pressure reducer used in mine rescue systems is typically set to a range of 4 to 4.4 bar. This range is crucial because it ensures that the breathing apparatus operates effectively and provides a safe and consistent air supply to the user. The pressure must be sufficient to deliver air adequately while also maintaining a level where the system can perform reliably under the conditions commonly encountered in mine rescue situations, such as high carbon dioxide levels or reduced oxygen availability.

Operating too low or too high can compromise the effectiveness of the equipment, either by providing inadequate air to breathe or by potentially introducing safety hazards. Thus, the specified range supports both safety and performance standards critical to emergency response in mining environments, making it the correct choice.