If the Primary Pressure Reducer fails, what happens?

When the primary pressure reducer fails, the function of the secondary pressure reducer is to ensure that airflow is maintained to the user. The automatic transfer valve is designed to respond to such a failure by opening, allowing the secondary pressure reducer to take control of the air supply. This mechanism is essential for maintaining safety and functionality during emergency situations.

The design of the SCBA includes this redundancy to provide a failsafe that maximizes the chances of a continuous air supply, which is critical in hazardous environments. This means that, even if the primary reducer fails, the user is not immediately cut off from oxygen, allowing them to safely navigate the situation. This systematized response to failure highlights the importance of having a reliable backup within the breathing apparatus.

In contrast, if the air supply were to cut off immediately, the SCBA would be significantly less safe. Similarly, if the entire system were to become non-functional or if the Vibralert were to stop working, this would create undue risks for the user in a potentially life-threatening environment. The role of the secondary reducer in taking over is a key component that enhances the reliability and safety of the SCBA.