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

A pressure relief valve plays a crucial role in maintaining the safety and integrity of a system by preventing potential hazards associated with excessive pressure. Its primary function is to monitor the pressure within a system and open when a predefined pressure threshold is reached. This action allows for the safe release of excess fluid or gas, thereby mitigating risks such as equipment failure, explosions, or leaks that can occur when pressure levels become too high. The design of the valve ensures that the system maintains safe operational conditions, contributing to both safety and efficiency.

In contrast, increasing system pressure is not within the function of a pressure relief valve, nor is it intended for regulating temperature, which is typically governed by other components like thermostats or heat exchangers. Additionally, while filtering contaminants is an important aspect of system maintenance, this task is performed by filters, not pressure relief valves.