What happens to the SCBA unit after the bottle is turned off and bled down?

When the SCBA bottle is turned off and the system is bled down, the air supply to the unit is cut off. This results in the system losing pressure and triggering an automatic shutdown mechanism, which turns off the SCBA unit. This feature is important for safety, as it prevents the wearer from inadvertently using residual air pressure and helps ensure that the unit is in a secure, non-operational state when not in use.

The ability of the SCBA to automatically turn off helps to maintain operational integrity and prolong the life of the equipment, preventing potential misuse or malfunction. This automatic shut-off is a crucial safety feature designed to protect the user in hazardous environments.