Where does a pressure compensating valve sense pressure in a hydraulic circuit?

A pressure compensating valve is designed to maintain a consistent pressure output despite variations in the input pressure or flow within a hydraulic system. The correct location for sensing pressure is at the pump. By sensing pressure at the pump, the valve can effectively monitor the pressure supplied to the hydraulic circuit and make necessary adjustments to maintain the desired pressure level, ensuring optimal operation of the system.

Sensing at the pump allows the valve to react to pressure fluctuations and adjust the flow or pressure accordingly. This functionality is crucial for applications where maintaining a specific pressure is vital for machine operation and efficiency.

Other options, while relevant in the context of a hydraulic system, do not provide the necessary feedback to ensure consistent pressure control. For instance, sensing pressure at the reservoir could lead to delays in adjustments, while pressure at the valve outlet or the inlet of the compensating valve would not provide adequate information about the system's overall pressure dynamics.