What does the safety valve in the anti-G system do?

The safety valve in the anti-G system plays a critical role in maintaining the integrity and safety of the system by automatically relieving system pressure if it exceeds a specific threshold of 7 psi. This pressure relief is essential to prevent potential damage to the system components or failure of the anti-G system, which could compromise pilot safety during high G-force maneuvers. By automatically releasing excess pressure, the safety valve allows the system to operate within its designed specifications and maintain the appropriate pressure levels needed for effective performance.

The other functions, such as cooling and conditioning the bleed air or providing cooling water, are handled by different components in the system and are not the purpose of the safety valve. Additionally, protection against contamination is managed by other safeguards within the system, making the safety valve’s primary function vital for pressure management.