Which statement describes a simple hydraulic circuit for two actuators driven by a single pump?

Which statement describes a simple hydraulic circuit for two actuators driven by a single pump?

• A. Pump → pressure line → 4/2 or 5/2 valve → two actuators in parallel or series with return lines to reservoir; include filter and relief valve.
• B. Pump directly feeds two actuators in series with no reservoir.
• C. Two actuators connected in parallel to a reservoir with a check valve only.
• D. A single actuator and reservoir with no valve.

Answer: (A)

When you power two actuators from a single pump, you need a controlled path for fluid from the pump to the actuators and back to the reservoir. The simplest, practical setup uses a pump feeding a pressure line that goes through a directional control valve (such as a 4/2 or 5/2 valve) to route flow to the actuators. The actuators can be connected in parallel or in series, with return lines or a shared path back to the reservoir. To keep the system reliable, you also include a filter to clean the fluid and a relief valve to limit pressure and protect components. This combination lets you control movement and force while ensuring fluid can circulate and be replenished. Why the other options aren’t appropriate here: one option proposes feeding two actuators in series with no reservoir, which removes the necessary return path and pressure control, making the system slow, unbalanced, or unsafe. Another relies on a check valve only, which doesn’t provide the required directional control or proper flow paths for two actuators. The last option mentions a single actuator with a reservoir and no valve, which doesn’t describe two actuators under control from one pump.

When you power two actuators from a single pump, you need a controlled path for fluid from the pump to the actuators and back to the reservoir. The simplest, practical setup uses a pump feeding a pressure line that goes through a directional control valve (such as a 4/2 or 5/2 valve) to route flow to the actuators. The actuators can be connected in parallel or in series, with return lines or a shared path back to the reservoir. To keep the system reliable, you also include a filter to clean the fluid and a relief valve to limit pressure and protect components. This combination lets you control movement and force while ensuring fluid can circulate and be replenished.

Why the other options aren’t appropriate here: one option proposes feeding two actuators in series with no reservoir, which removes the necessary return path and pressure control, making the system slow, unbalanced, or unsafe. Another relies on a check valve only, which doesn’t provide the required directional control or proper flow paths for two actuators. The last option mentions a single actuator with a reservoir and no valve, which doesn’t describe two actuators under control from one pump.