Relief valves return bypassed flow to which part of the system?

Relief valves return bypassed flow to which part of the system?

• A. Atmosphere
• B. Pump
• C. Actuator
• D. Reservoir

Answer: (D)

Relief valves protect the system by opening when pressure gets too high and sending excess fluid back to the reservoir. This return to the tank completes the hydraulic loop, allowing the fluid to be cooled, filtered, and then drawn back into the pump to continue circulating at safe pressures. Returning to atmosphere would waste oil and create environmental issues, while sending the flow to the actuator or directly into the pump inlet would fail to relieve the system properly or maintain correct flow control. The reservoir provides the low-pressure return path that keeps the system safe and ready for the next cycle.

Relief valves protect the system by opening when pressure gets too high and sending excess fluid back to the reservoir. This return to the tank completes the hydraulic loop, allowing the fluid to be cooled, filtered, and then drawn back into the pump to continue circulating at safe pressures. Returning to atmosphere would waste oil and create environmental issues, while sending the flow to the actuator or directly into the pump inlet would fail to relieve the system properly or maintain correct flow control. The reservoir provides the low-pressure return path that keeps the system safe and ready for the next cycle.