What is the function of a relief valve in a boiler system?

The function of a relief valve in a boiler system is to allow excess pressure to escape. This is crucial for safety as it prevents potentially dangerous over-pressurization within the boiler. When pressure inside the boiler exceeds a predetermined limit, the relief valve automatically opens, releasing steam or water to reduce the pressure back to safe levels. This mechanism is essential for preventing accidents such as boiler explosions or structural damage due to excessive pressure buildup.

The other options do not accurately describe the primary purpose of a relief valve. Increasing water pressure, cooling the boiler, or enhancing steam production do not align with the role of a relief valve, which specifically focuses on pressure regulation and safety in the system.