Bosch Rexroth | AA10VSO28DFLR31R-PPA12N00
AA10VSO28DFLR/31R-PPA12N00
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The AA10VSO28DFLR/31R-PPA12N00 variable displacement axial piston pump belongs to the A10VSO Variable Pumps series and is produced by Bosch Rexroth. It supplies hydraulic power to automated machinery where piston stroke must change with demand. The pump integrates pressure, flow, and power control so the swashplate angle adjusts automatically. A geometric displacement of 28 cm³ per revolution defines its volumetric output, and clockwise rotation matches common prime movers. Nominal pressure is 4,100 psi for continuous duty. At 1,800 rpm and maximum displacement it provides 13.3 gpm, and under the same speed and pressure it requires 24 kW from the drive motor. The internal case volume holds 0.7 l of leakage oil, while NBR seals contain this fluid. Shaft torque reaches 33 lb-ft at 1,450 psi, giving a reference for low-pressure start-up.
The pump tolerates peak excursions to 5,100 psi, allowing it to survive brief load surges. With the swashplate fully stroked and the shaft at 3,000 rpm it delivers 22 gpm, supporting high-speed cylinder motion. Permissible speed rises to 3,600 rpm when displacement is reduced, but is limited to 3,000 rpm at full stroke to control bearing loads. A reflected moment of inertia of 0.0017 kg·m² lets the drive accelerate the pump quickly. Required shaft torque increases to 92 lb-ft when operating at 4,100 psi and maximum displacement, a value used for coupling selection. No through drive is provided, so the unit cannot pass mechanical power to an auxiliary pump. The combined limits on pressure, flow, and speed position this model for compact, responsive hydraulic systems.
Technical Specifications
Case Volume
0.7 l
Control Function
Pressure, Flow And Power Control
Direction Of Rotation
Clockwise
Displacement (geometric)
28 cm³/rev
Flow At 1800 Rpm (vg Max)
13.3 gpm
Flow At 3000 Rpm (vg Max)
22 gpm
Max Speed (vg<vg Max)
3600 rpm
Max Speed At Vg Max
3000 rpm
Maximum Pressure
5100 psi (350 bar)
Moment Of Inertia
0.0017 kg·m²
Nominal Pressure
4100 psi (280 bar)
Power At 1800 Rpm (4100 Psi)
24 kW
Sealing Material
NBR
Through Drive
None
Torque At 1450 Psi (vg Max)
33 lb-ft
Torque At 4100 Psi (vg Max)
92 lb-ft
1620 Old Apex Road
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