At what psi does the secondary reducer and low cylinder transfer valve activate?

The secondary reducer and low cylinder transfer valve in the Scott Air-Pak X3 SCBA system are designed to ensure a continuous supply of breathable air to the user, even when the primary supply is dwindling. The activation of the secondary reducer and the low cylinder transfer valve occurs at 1825 psi. This activation point is critical because it allows the firefighter or user to be alerted that the primary air supply is nearing depletion, thereby providing an important safety measure.

This pressure threshold is deliberately chosen to give enough remaining air supply for the user to safely exit a hazardous environment. The system ensures a seamless transition from the primary cylinder to the secondary supply, allowing for a buffer time in which the user can respond effectively to the situation at hand. Understanding this aspect of the SCBA is vital for maintaining safety and operational readiness in emergencies.