In a circuit with two actuators, how does flow distribute when the actuators are connected in parallel versus in series?

In a circuit with two actuators, how does flow distribute when the actuators are connected in parallel versus in series?

• A. In parallel, each actuator receives a portion of the pump flow; in series, the same flow passes through both actuators.
• B. In parallel, one actuator always fully blocks the flow to the other.
• C. In series, actuators can be independently controlled without a valve.
• D. In parallel, flow is blocked to the reservoir.

Answer: (A)

Flow distribution depends on whether the actuators share the same path or have independent paths. When two actuators are connected in parallel, the pump’s flow splits into separate branches. Each branch carries a portion of the total flow, determined by the hydraulic resistance of that branch (and any control valves setting the flow). If the actuators are similar, they split the flow roughly in half; if one path offers less resistance, more flow goes there. This setup allows each actuator to operate with its own flow path, effectively sharing the pump output. When the actuators are in series, there is only one path for the fluid, so the same flow rate must pass through both actuators sequentially. The flow through both is the same, while the pressure needed at each stage adds up to overcome the combined resistance. If one actuator restricts the flow more, it limits the flow available to the next one as well, since there’s no alternate path. So, the statement that in parallel each actuator receives a portion of the pump flow and in series the same flow passes through both is the correct description. The other ideas don’t reflect how flow actually distributes in these configurations: parallel doesn’t inherently block one path from the other, and series doesn’t allow independent, valve-free control of each actuator; plus parallel flow isn’t inherently blocked to the reservoir.

Flow distribution depends on whether the actuators share the same path or have independent paths. When two actuators are connected in parallel, the pump’s flow splits into separate branches. Each branch carries a portion of the total flow, determined by the hydraulic resistance of that branch (and any control valves setting the flow). If the actuators are similar, they split the flow roughly in half; if one path offers less resistance, more flow goes there. This setup allows each actuator to operate with its own flow path, effectively sharing the pump output.

When the actuators are in series, there is only one path for the fluid, so the same flow rate must pass through both actuators sequentially. The flow through both is the same, while the pressure needed at each stage adds up to overcome the combined resistance. If one actuator restricts the flow more, it limits the flow available to the next one as well, since there’s no alternate path.

So, the statement that in parallel each actuator receives a portion of the pump flow and in series the same flow passes through both is the correct description. The other ideas don’t reflect how flow actually distributes in these configurations: parallel doesn’t inherently block one path from the other, and series doesn’t allow independent, valve-free control of each actuator; plus parallel flow isn’t inherently blocked to the reservoir.