Bosch Rexroth | AA10VSO45DFLR31R-VPA12N00
AA10VSO45DFLR/31R-VPA12N00
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The AA10VSO45DFLR/31R-VPA12N00 axial piston pump belongs to the A10VSO Variable Pumps series from Bosch Rexroth and provides variable hydraulic flow for automated circuits. It has a displacement of 45 cm³ per revolution, determining the volume moved each shaft turn. A nominal pressure of 280 bar supports continuous duty, while the 350 bar maximum pressure handles short peaks. Displacement control starts at 80 bar through the DFLR mechanism, trimming flow as pressure rises. The minimum inlet pressure of 0.8 bar prevents cavitation, and the suction port may accept up to 10 bar when a boost pump is present. Internal case pressure is limited to 2 bar to protect seals. At 1800 rpm the pump delivers 81 l/min, and its 0.0033 kg·m² moment of inertia guides drive sizing during acceleration.
When speed increases to 2600 rpm the pump outputs 117 l/min, and it may run at 2600 rpm with full displacement or 3100 rpm with reduced displacement for flexible duty cycles. The working fluid can reach 110 °C, which sets the thermal limit for oil and cooling selection. A torque of 200 Nm is required at 280 bar, matching motor sizing for continuous operation. The pilot port tolerates up to 350 bar so control signals remain reliable even at maximum system load. Oil cleanliness must meet ISO 4406 class 20/18/15 to limit internal wear. These parameters establish stable flow and pressure control for hydraulic automation tasks.
Technical Specifications
Case Pressure Max (abs)
2 bar
Dflr Start Of Control
80 bar
Displacement (vg Max)
45 cm³/rev
Inlet Pressure Min (abs)
0.8 bar
Max Flow At 1800 Rpm
81 l/min
Max Flow At 2600 Rpm
117 l/min
Max Fluid Temperature
110 °C
Max Speed (vg < Vg Max)
3100 rpm
Max Speed (vg Max)
2600 rpm
Max Torque At 280 Bar
200 Nm
Maximum Pressure
350 bar
Moment Of Inertia
0.0033 kg·m²
Nominal Pressure
280 bar
Pilot Port Pressure Max
350 bar
Required Cleanliness Iso 4406
20/18/15
Suction Port Pressure Max
10 bar
1620 Old Apex Road
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