What is a distinguishing feature of an open-center selector valve in hydraulic systems?

An open-center selector valve is characterized by allowing fluid to flow through the valve even when it is in the OFF position. This design permits fluid to circulate through the valve and back to the reservoir, thereby maintaining a continuous flow in the hydraulic system. This feature is particularly advantageous in applications that require a constant supply of fluid pressure for multiple actuators, as it helps prevent overheating and cavitation by ensuring that fluid can move freely even when not actively directing flow to a specific actuator.

This operational principle is essential as it allows for the versatility and efficiency of hydraulic systems, permitting uninterrupted operation and reducing the chances of system overheating due to stagnant fluid. Understanding this key feature helps in effectively designing and troubleshooting hydraulic systems.