What safety device is installed to prevent overpressure in a boiler?

The pressure relief valve is a critical safety device designed specifically to prevent overpressure in a boiler. Its primary function is to automatically release excess pressure to ensure that the pressure within the system does not exceed safe limits. When the pressure inside the boiler reaches a predetermined threshold, the valve opens, allowing steam or gas to escape, thus preventing potential damage or catastrophic failure of the boiler system. This adherence to safety protocols is paramount in boiler operations, as overpressure conditions can result in dangerous situations, including explosions.

The other options serve different purposes within the boiler system. A steam trap is used to remove condensate while preventing the loss of steam, but it does not manage pressure. A water level gauge provides essential information about the water level in the boiler, which is vital for safe operation, but it does not control pressure. The combustion chamber is the area where fuel is burned to create heat but does not directly function as a safety device for pressure control. By ensuring that a pressure relief valve is properly installed and maintained, boiler operators can significantly enhance the safety and reliability of the boiler system.