What do the safety valves regulate in the pressurization system?

In the pressurization system, safety valves primarily regulate cabin pressure differential. This means they are designed to prevent the pressure inside the cabin from exceeding a safe limit compared to the pressure outside the aircraft. The cabin pressure differential is crucial for maintaining a safe and comfortable environment for passengers and crew at high altitudes, where outside air pressure is significantly lower.

During flight, if the cabin pressure exceeds a predetermined level due to malfunction or failure in the pressurization system, the safety valves will automatically open. This release of pressure ensures that the cabin remains within safe operating parameters, protecting the structure of the aircraft and the wellbeing of those onboard.

It is important to understand that while temperature, altitude, and bleed air flow are significant aspects of the aircraft systems, they do not directly pertain to the primary function of safety valves in the context of pressurization. The safety valves' specific role is focused on managing pressure differential rather than regulating temperature or altitude directly, or controlling bleed air flow.