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

The function of a relief valve in a hydraulic system is essential for maintaining safe operating conditions. Its primary role is to prevent system overload by allowing excess fluid to escape if the pressure rises above a predetermined level.

When the hydraulic system operates, it generates pressure to perform tasks, such as lifting or moving loads. If this pressure exceeds safe limits, it can lead to equipment failure or damage to components within the system. The relief valve acts as a safety device by opening at a specific pressure threshold, diverting hydraulic fluid away from the main circuit, which reduces pressure and protects against potential harm.

Understanding the purpose of a relief valve is critical for anyone working with hydraulic systems, as it ensures safety and reliability during operation. While other components in a hydraulic system may focus on different functionalities—such as controlling fluid flow or filtering contaminants—the relief valve's unique responsibility is centered on preventing overload scenarios.