Bosch Rexroth | AA10VSO71DFR131L-PPA12N00-SO32
AA10VSO71DFR1/31L-PPA12N00 SO32
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The AA10VSO71DFR1/31L-PPA12N00 SO32 is a variable axial piston pump produced by Bosch Rexroth within the A10VSO Variable Pumps series for pressure-controlled flow in hydraulic automation circuits. Its displacement is 71 cm³ per revolution, which defines the volume transferred each shaft turn. At nominal speed the pump supplies 156 l/min, covering medium-duty actuators. Nominal operating pressure is 280 bar to handle continuous loads, while the design tolerates a maximum of 350 bar for short peaks. Shaft power reaches 73 kW at nominal conditions so motor sizing must match. The required torque is 316 Nm when the unit runs at 280 bar and full displacement. Continuous operation at full displacement is limited to 2200 rpm to prevent inlet starvation. The shaft turns counter-clockwise, and an inlet pressure of at least 0.8 bar absolute is needed to avoid cavitation.
Speed can increase to 2600 rpm when the displacement setting is reduced, giving extra flow for brief demand spikes. The DFR1 control maintains a 14 bar differential between outlet and control line to stabilize system pressure. Pilot oil consumption is capped at 3 l/min, which limits heat generated by the regulator. The pilot port withstands 350 bar so it can connect directly to high-pressure control valves. An internal case volume of 1.6 l stores leakage oil for cooling and lubrication. Case drain pressure must stay below 2 bar absolute, requiring a low-restriction return line. The pump weighs 35.2 kg without a through drive, a detail relevant for mounting and handling. These operating limits support reliable service in both open and closed hydraulic loops.
Technical Specifications
Case Pressure Max (abs)
2 bar (30 psi)
Case Volume
1.6 l (0.420 gal)
Dfr1 Differential Pressure
14 bar (200 psi)
Direction Of Rotation
Counter-Clockwise (L)
Displacement
71 cm³/rev
Flow At Nnom, Vg Max
156 l/min (41.2 gpm)
Max Speed At Reduced Vg
2600 rpm
Max Speed At Vg Max
2200 rpm
Maximum Pressure
350 bar (5100 psi)
Minimum Inlet Pressure (abs)
0.8 bar (12 psi)
Nominal Pressure
280 bar (4100 psi)
Pilot Oil Consumption Max (dfr1)
3 l/min (0.8 gpm)
Pilot Port Pressure Max
350 bar (5100 psi)
Power At Nnom (280 Bar)
73 kW (98 hp)
Torque At Vg Max (280 Bar)
316 Nm (233 lb-ft)
Weight Without Through Drive
35.2 kg (78 lb)
1620 Old Apex Road
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