Bosch Rexroth | AA10VSO140DFR31R-PKD62K38
AA10VSO140DFR/31R-PKD62K38
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The AA10VSO140DFR/31R-PKD62K38 variable pump belongs to the A10VSO Variable Pumps series and is manufactured by Bosch Rexroth to provide adjustable flow in hydraulic automation. Its geometric displacement of 140 cm³ per revolution defines the volume moved each shaft turn and supports circuits that need consistent delivery. A maximum speed of 1800 rpm permits fast duty cycles without exceeding mechanical limits, and at that speed the pump can supply up to 66.6 gpm to high-flow actuators. The nominal pressure rating of 280 bar sets the continuous operating limit, while a peak rating of 350 bar allows short transient spikes during load changes. Clockwise rotation aligns with common prime mover arrangements for simple coupling. The unit weighs 132 lb, a factor for mounting and service handling. Cavitation is avoided by maintaining at least 12 psi absolute pressure at the inlet port during operation.
The remaining parameters guide installation and control. Case drain pressure must stay below 29 psi to protect internal seals from backpressure. The DFR compensator keeps a 200 psi differential across a downstream throttle, and flow deviation under this control is limited to 1.60 gpm so system speed remains stable. At 280 bar the shaft produces 453 lb-ft of torque, and power demand at 1800 rpm reaches 158 hp, information needed for sizing the drive motor. Fluid enters through an SAE J518 2-1/2 inch inlet flange that minimizes suction losses, and exits the pressure side via an SAE J518 1-1/4 inch port suitable for high-pressure piping. A 9/16-18 UNF-2B threaded pilot port accepts remote control lines for setting the compensator, completing the connection scheme for this pump.
Technical Specifications
Case Drain Pressure Max
29 psi (2 bar)
Dfr Differential Pressure Setting
200 psi (14 bar)
Dfr Flow Deviation Max
1.60 gpm (6.0 L/min)
Geometric Displacement
140 cm³/rev (8.54 in³/rev)
Inlet Absolute Pressure Min
12 psi (0.8 bar)
Inlet Port S
SAE J518 2-1/2 in
Max Flow At Max Speed
66.6 gpm (252 L/min)
Max Speed (vg Max)
1800 rpm
Nominal Pressure
280 bar (4000 psi)
Peak Pressure
350 bar (5100 psi)
Pilot Port X Thread
9/16-18 UNF-2B
Power At 1800 Rpm (280 Bar)
158 hp (118 kW)
Pressure Port B
SAE J518 1-1/4 in
Rotation
Clockwise (R)
Torque At 280 Bar
453 lb-ft (623 Nm)
Weight
132 lb (60 kg)
1620 Old Apex Road
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