What is the function of a relief valve?

A relief valve plays a critical role in maintaining safety within pressurized systems by preventing excessive pressure build-up. When the pressure within a system rises beyond a preset limit, the relief valve automatically opens to release some of the pressure. This release helps protect the system components, such as pipes and fittings, from potential failure or rupture, which could result in hazardous situations such as leaks, explosions, or equipment damage.

This function is essential to ensure the safe operation of boilers, piping systems, and various industrial machinery where pressure is a significant factor. By discharging excess pressure, the relief valve contributes to overall system integrity and safety, allowing it to operate efficiently without risking catastrophic failures.

The other options do not align with the primary purpose of a relief valve. Enhancing system performance, regulating water flow, or measuring temperature involves different components or systems entirely and do not address the specific function of managing pressure, which is critical for safe operation.