What is the purpose of a boiler's pressure relief valve?

The purpose of a boiler's pressure relief valve is to prevent excessive pressure build-up within the system. This component is critical for ensuring the safe operation of a boiler. When the pressure inside the boiler exceeds the designed limits, the pressure relief valve automatically opens to release steam or water, thereby lowering the pressure to a safe level. This function protects the boiler and surrounding equipment from potential damage or catastrophic failure that could result from over-pressurization.

Safety is the main concern addressed by the pressure relief valve, as it acts as a safeguard against dangerous conditions that could lead to explosions or structural failures. By monitoring the pressure within the system and releasing excess pressure when needed, the pressure relief valve helps maintain the integrity and safety of the boiler.