Bosch Rexroth | AA10VS018DFR131R-VPA12N00
AA10VS018DFR1/31R-VPA12N00
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The AA10VS018DFR1/31R-VPA12N00 variable displacement pump is part of the A10VSO Variable Pumps series manufactured by Bosch Rexroth for hydraulic automation circuits that require load-responsive flow. It features a pressure-flow DFR1 control that modulates swash-plate angle to balance delivery and pressure, and the regulator works around a differential setting of 200 psi (14 bar). Displacement is fixed at 18 cm³ per revolution (1.10 in³/rev), giving 8.5 gpm (32 l/min) at 1800 rpm when the volume setting is at maximum. The shaft is configured for clockwise rotation to match typical drivetrain layouts, and the SAE J744 mounting flange simplifies direct coupling to prime movers. When the displacement is reduced, the unit may run up to 3900 rpm, extending its usable speed range, while a weight of 26 lb (12 kg) keeps handling requirements moderate during installation.
With the swash-plate at full stroke the permissible speed drops to 3300 rpm to limit bearing loads. The pump carries a nominal pressure rating of 4100 psi (280 bar) and draws 38 HP (28 kW) at that point; maximum pressure capability rises to 5100 psi (350 bar) for short duration peaks. Output torque increases proportionally with system pressure, reaching 22 lb-ft (30 Nm) at 100 bar and 59 lb-ft (80 Nm) at 280 bar, data used for drive sizing. At its nominal speed it supplies 15.6 gpm (59 l/min) when set to maximum displacement, supporting medium-flow actuator groups. Connection ports follow the SAE J518 flanged standard for straightforward manifold integration, rounding out a specification set tailored to stable, efficient hydraulic power delivery.
Technical Specifications
Control Type
Pressure-Flow (DFR1)
Differential Pressure Std (dfr1)
200 psi (14 bar)
Direction Of Rotation
Clockwise
Displacement
18 cm3/rev (1.10 in3/rev)
Flow At 1800 Rpm (vg Max)
8.5 gpm (32 l/min)
Flow At Nnom (vg Max)
15.6 gpm (59 l/min)
Max Speed (vg < Vg Max)
3900 rpm
Max Speed (vg Max)
3300 rpm
Maximum Pressure
5100 psi (350 bar)
Mounting Flange
SAE J744
Nominal Pressure
4100 psi (280 bar)
Ports
SAE J518 Flanged
Power At Nnom (4100 Psi)
38 HP (28 kW)
Torque At 100 Bar (vg Max)
22 lb-ft (30 Nm)
Torque At 280 Bar (vg Max)
59 lb-ft (80 Nm)
Weight
26 lb (12 kg)
1620 Old Apex Road
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