What is a pressure relief valve used for in a boiler system?

A pressure relief valve in a boiler system serves a critical safety function by automatically releasing excess pressure to prevent over-pressurization. When the pressure inside the boiler exceeds a predetermined safe limit, the pressure relief valve opens, allowing steam or fluid to escape. This mechanism protects the integrity of the boiler and associated equipment from the potentially catastrophic consequences of excessive pressure, such as explosions or structural failures.

The design and operation of a pressure relief valve are essential components in ensuring the safe and efficient operation of a boiler. It does not maintain low pressure in the system or increase the flow of steam, as those functions pertain to other system components. Additionally, a pressure relief valve does not measure temperature; temperature sensing would typically involve thermocouples or thermometers. Thus, the role of the pressure relief valve is solely focused on managing pressure levels to enhance safety within the boiler system.