What is a common advantage of closed-center circuits?

What is a common advantage of closed-center circuits?

• A. Constant energy waste with no hold capability
• B. Ability to hold actuator position without continuous energy input
• C. Always higher energy usage than open-center
• D. Easier to leak-proof

Answer: (B)

In closed-center circuits, the control valve centers to block flow, trapping hydraulic fluid under pressure in the lines and actuator. That means the actuator can stay in its last commanded position without the pump continuously delivering flow, so you hold a load with little or no ongoing energy input. The pressure remains to resist the load, and only leakage or friction can cause drift, not a constant energy draw. This is why holding capability without a constant energy supply is a key advantage of closed-center systems. The other statements describe conditions that don’t reflect this natural hold-and-forget behavior: constant energy waste would occur if flow kept circulating, which closed-center avoids; energy use isn’t inherently higher than open-center (it’s often lower when holding); and leakage behavior depends on seals and sizing, not the circuit type itself.

In closed-center circuits, the control valve centers to block flow, trapping hydraulic fluid under pressure in the lines and actuator. That means the actuator can stay in its last commanded position without the pump continuously delivering flow, so you hold a load with little or no ongoing energy input. The pressure remains to resist the load, and only leakage or friction can cause drift, not a constant energy draw. This is why holding capability without a constant energy supply is a key advantage of closed-center systems. The other statements describe conditions that don’t reflect this natural hold-and-forget behavior: constant energy waste would occur if flow kept circulating, which closed-center avoids; energy use isn’t inherently higher than open-center (it’s often lower when holding); and leakage behavior depends on seals and sizing, not the circuit type itself.