What is the significance of a safety valve's set pressure?

The set pressure of a safety valve is crucial because it is the specific pressure at which the valve is designed to open and relieve excess pressure from a system, such as a boiler or other pressure vessels. This function is vital for preventing overpressure situations that could lead to equipment failure or catastrophic events.

Once the pressure in the system exceeds this set point, the safety valve opens automatically, allowing steam or fluid to escape, which helps to lower the internal pressure to a safe level. This mechanism is essential for maintaining safe operational conditions and protecting both the equipment and personnel in the vicinity.

Understanding the role of the set pressure helps engineers to properly size and select safety valves for specific applications, ensuring that they operate effectively within the designed limits of the system.