What is the primary function of a pressure relief valve?

The primary function of a pressure relief valve is to prevent excessive pressure build-up in a system. When a system experiences an increase in pressure that could lead to dangerous conditions, such as equipment failure or explosive scenarios, the pressure relief valve automatically opens to release excess pressure. This action protects the integrity of the system by allowing fluid to escape safely, thereby maintaining operational pressure within safe limits. This safety mechanism is crucial in various industries, including chemical processing, oil and gas, and water treatment, where uncontrolled pressure could lead to significant hazards.

In contrast, while fluid flow management and temperature control are important aspects of operational systems, they are not the primary functions of a pressure relief valve. Similarly, measuring pressure is a distinct function typically performed by pressure gauges, not relief valves.