What is the primary function of a relief valve?

The primary function of a relief valve is to open when pressure exceeds a predetermined limit. This is crucial in systems where maintaining safe pressure levels is essential. When the pressure in a system rises beyond the set threshold, the relief valve activates, allowing excess fluid or gas to escape, thus preventing potential equipment damage, explosions, or safety hazards.

The design and operation of relief valves are critical in applications such as pressure vessels, piping systems, and HVAC systems, where overpressure can pose serious risks. The valve ensures a controlled release of pressure, effectively safeguarding the system's integrity and protecting personnel and the environment from accidents associated with overpressure situations.

While other functions may relate to fluid systems, such as preventing backflow or regulating temperature, these are not the primary role of a relief valve, which focuses specifically on pressure management.