What is the primary function of a pressure relief valve in hydraulic systems?

The primary function of a pressure relief valve in hydraulic systems is to prevent over-pressurization and potential damage. This is a crucial safety feature that protects the hydraulic system from excessive pressure buildup, which can lead to failures such as ruptured hoses, damaged components, or catastrophic system failures.

When the fluid pressure in the hydraulic system exceeds a predetermined limit, the pressure relief valve opens and allows hydraulic fluid to flow back into the reservoir or to a return line, thereby relieving pressure. This process not only protects the integrity of the hydraulic components but also ensures the safe operation of the equipment. Understanding this function is essential for troubleshooting hydraulic systems and maintaining operational safety.

While other options such as filtering contaminants or monitoring fluid temperature are important aspects of hydraulic system maintenance and operation, they do not pertain to the specific purpose of pressure relief valves.