A safety valve is a crucial device designed to automatically open when the pressure on the inlet side exceeds a predetermined limit, allowing the discharge of fluid (such as steam or gas). Once the pressure drops back to the prescribed value, the valve disc automatically closes, restoring the system to normal.

Safety valves act as a final safety mechanism to protect against overpressure in various systems, ensuring that fluid is released in a controlled manner without the need for external power. These valves are essential for maintaining system integrity and preventing damage caused by excessive pressure buildup.