This crucial component within a pneumatic braking system is designed to safeguard against over-pressurization. Functioning as a safety mechanism, it automatically discharges excess compressed air when the system pressure surpasses a predetermined threshold. For instance, if a compressor malfunction leads to an uncontrolled pressure increase, this device activates to vent the surplus air, preventing potential damage to the braking system’s components.
The incorporation of such a mechanism is paramount to maintaining the operational integrity and reliability of pneumatic brakes. It mitigates the risk of component failure due to excessive pressure, contributing significantly to enhanced safety during vehicle operation. Historically, these have evolved from simple spring-loaded designs to more sophisticated, precisely calibrated units, reflecting advancements in braking technology and stringent safety standards.