The center position of a DCV that connects all ports is called what?

• A. Closed
• B. Open
• C. Float
• D. Tandem

Answer: (B)

In the center position of a directional control valve, the arrangement that allows flow to pass between the ports is called open center. This means the internal passages connect the main ports so fluid can flow even when the valve isn’t being actuated, preventing deadlock and allowing smoother transitions when you shift the valve. It contrasts with a closed-center setup, where all ports are blocked in the center, stopping flow. A float center is a different condition where the actuator is allowed to move freely without valve resistance, and tandem relates to how multiple valves are arranged together rather than how the center connects ports. So, the center position that connects all ports is open center.