Bosch Rexroth | A10VSO71DRG31R-VPA42N00
A10VSO71DRG/31R-VPA42N00
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The A10VSO71DRG/31R-VPA42N00 pump belongs to the A10VSO Variable Pumps series and is manufactured by Bosch Rexroth. It supplies adjustable hydraulic flow for automated systems through DRG remote pressure control, allowing a valve to set the operating pressure from a distance. Clockwise rotation matches right-hand prime movers and simplifies drivetrain alignment. A displacement of 71 cm³ per revolution defines the volume delivered per shaft turn, while a nominal working pressure of 4100 psi supports high force actuators. The unit sustains peak loads up to 5100 psi for short durations without damage. At the rated speed of 2200 rpm it can deliver 41.2 gpm, giving designers a clear flow reference. This maximum-displacement speed limit also prevents excessive internal velocity. A minimum inlet pressure of 12 psi is required to keep the pumping elements fully flooded and avoid cavitation during continuous duty.
The pump can run at 2600 rpm when the displacement is reduced, which widens the usable power band for variable-speed drives. Torque demand reaches 233 lb-ft at the 4100 psi nominal pressure, informing coupling and motor sizing. DRG hysteresis is held below 45 psi, so remote pressure adjustments track setpoints with limited overshoot. A 2 in suction port built to ISO 6162-1 allows low-restriction fluid entry, and a 1 in working port of the same standard carries the high-pressure output. Control oil is routed through a pilot port threaded 7/16-20 UNF-2B, while case drainage exits via a 7/8-14 UNF-2B drain port to maintain housing pressure. Overall weight without a through drive is 78 lb, which influences support bracket selection during installation.
Technical Specifications
Control Type
DRG (Remote Pressure Control)
Direction Of Rotation
Clockwise (R)
Displacement
71 cm³/rev
Drain Port L Thread
7/8-14 UNF-2B
Drg Hysteresis
45 psi (3 bar) max
Max Flow @ 2200 Rpm
41.2 gpm (156 L/min)
Max Perm Speed (vg<vg Max)
2600 rpm
Max Speed (vg Max)
2200 rpm
Minimum Inlet Pressure (abs)
12 psi (0.8 bar)
Nominal Pressure
4100 psi (280 bar)
Peak Pressure
5100 psi (350 bar)
Pilot Port X Thread
7/16-20 UNF-2B
Suction Port S Size
2 in (ISO 6162-1)
Torque @ 4100 Psi
233 lb-ft (316 Nm)
Weight (without Through Drive)
78 lb (35.2 kg)
Working Port B Size
1 in (ISO 6162-1)
1620 Old Apex Road
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