This critical component, integrated into compressed air vessels, is a pressure relief mechanism. It automatically discharges air when the internal pressure exceeds a predetermined limit, thereby preventing over-pressurization. An example includes a spring-loaded device calibrated to open at a specific pressure rating marked on the valve body, venting excess pressure until a safe level is restored.
The primary importance lies in safeguarding both equipment and personnel from the dangers associated with excessive pressure. Benefits extend to preventing catastrophic failures of the tank, reducing the risk of explosions, and ensuring compliance with safety regulations and industry standards. Historically, the implementation of these devices has significantly lowered accident rates related to compressed air systems.