What do safety relief valves protect against?

Safety relief valves are essential components designed to prevent overpressure situations within systems, particularly in aviation. Their primary function is to open and release pressure when it exceeds a specified limit, thereby protecting the integrity of the fuselage structure and various pressurized systems.

When the pressure reaches a level that could be potentially damaging, the safety relief valve activates, allowing for the safe and controlled release of excess pressure. This process helps to avert structural failures or catastrophic events that could arise from over-pressurization. Essentially, safety relief valves are critical in maintaining operational safety by ensuring that pressure levels remain within safe operational limits.

Other options, while they may relate to operational safety in aviation, do not pertain directly to the specific role of safety relief valves.