Bosch Rexroth | AA10VSO71DFR31R-PPA12K26
AA10VSO71DFR/31R-PPA12K26
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The AA10VSO71DFR/31R-PPA12K26 is an axial piston pump in the A10VSO Variable Pumps series from Bosch Rexroth, used to supply regulated oil flow in hydraulic automation lines. Its displacement is 71 cm³ per revolution, allowing predictable volume transfer at each shaft turn. DFR pressure-flow control adjusts the swash-plate angle to keep both pressure and flow within target values, while a 14 bar differential pressure setting maintains constant load-sensing performance. At 1,800 rpm the pump outputs 128 L/min, and DFR regulation holds flow deviation to no more than 2.8 L/min for steady actuator speed. The housing tolerates a continuous working pressure of 280 bar, and the drive shaft develops 316 Nm at that pressure to transmit required power. Clockwise rotation matches standard engine drives, simplifying integration with existing transmission layouts.
At the nominal speed of 2,200 rpm the unit can deliver up to 156 L/min, giving reserve capacity for peak demand, and permissible speed increases to 2,600 rpm when the displacement is reduced below the maximum setting. The inlet circuit accepts up to 10 bar absolute and must not fall below 0.8 bar absolute, protecting the pistons from cavitation, while the case drain is limited to 2 bar absolute to safeguard shaft seals. System loading may rise to 350 bar, and the pilot port X is also rated for 350 bar so remote control lines withstand full system pressure. These limits combine with the variable-flow feature to let designers match pump output to actuator requirements without exceeding component ratings.
Technical Specifications
Control Type
DFR (Pressure-Flow)
Dfr Differential Pressure Std
14 bar
Displacement
71 cm3/rev
Flow At 1800 Rpm
128 L/min
Flow Deviation (dfr) Max
2.8 L/min
Max Case Drain Pressure (abs)
2 bar
Max Flow At Nnom
156 L/min
Max Inlet Pressure
10 bar
Max Speed (vg<vgmax)
2600 rpm
Maximum Pressure
350 bar
Min Inlet Pressure (abs)
0.8 bar
Nominal Pressure
280 bar
Nominal Speed (vgmax)
2200 rpm
Pilot Port X Pressure Max
350 bar
Rotation Direction
Clockwise
Torque At 280 Bar
316 Nm
1620 Old Apex Road
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