What mechanism is included in a variable stroke type pump to prevent overload?

A variable stroke type pump is designed to adjust its output based on the demand. To prevent overload, which can occur if the pressure or flow exceeds the system’s capacity, it incorporates a relief valve mechanism. This mechanism acts as a safety feature, allowing excess fluid to bypass the pump, thus protecting both the pump and the connected system from damage due to overpressure conditions.

The relief valve is engineered to open at a predetermined pressure threshold, redirecting fluid back to the pump inlet or returning it to the reservoir, thereby maintaining optimal performance without causing damage. While other components such as spring-loaded valves, pressure regulators, and flow control valves perform important functions within a hydraulic system, they do not specifically address the need to prevent overload in the same direct manner as a relief valve does. Thus, the relief valve mechanism is essential for ensuring that the variable stroke type pump operates safely within its design limits.