Steel Rexroth Hydraulic Pump A10VSO71DG/31R-PPA42N00 A10VSO71DFR/31R-PPA12N00

Yes. The pump's FR control valve has a reserved interface for external proportional signals, which can be modified by adding a proportional amplifier (Rexroth VT-VSPA1-1-1X) to accept 4-20mA or 0-10V control signals. This enables automated flow adjustment based on system feedback (e.g., pressure, position sensors) in automated production lines. For example, in a robotic welding hydraulic system, the pump can receive a signal from the robot controller to reduce flow by 50% during standby, saving energy. Note that the modification requires calibration via Rexroth's IndraWorks software to ensure signal linearity (error ≤2%).

To achieve load-sensing (LS) functionality, match the pump with a Rexroth 4WRL directional valve (e.g., 4WRL16V120M-3X/G24Z4/M) equipped with an LS feedback port. The specific integration steps are: ① Connect the LS port of the directional valve to the pump's control port Y via a DN6 hose; ② Adjust the pump's pressure limiting knob to 30 bar higher than the maximum load pressure; ③ Set the directional valve's LS relief pressure to 20 bar higher than the load pressure. When the system is idle, the pump automatically reduces displacement to 5-10% (standby flow), and when the load is activated, it quickly increases displacement to meet demand, reducing energy consumption by up to 45% compared to constant flow operation.