Bosch Rexroth | AA4VG90EP3D132R-NSF52F001DP
AA4VG90EP3D1/32R-NSF52F001DP
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The AA4VG90EP3D1/32R-NSF52F001DP is a variable axial piston unit produced by Bosch Rexroth within the AA4VG Variable Pumps series. It serves closed-loop hydraulic drives where electronic regulation of displacement is required for automation tasks. The variable pump offers a displacement of 90 cm3 per revolution so circuit designers can determine the desired volumetric output. At a nominal speed of 3050 rpm with the swashplate fully stroked, the pump supplies 275 L/min to satisfy medium-to-high flow demands. Continuous operation at 400 bar allows the circuit to transmit 183 kW of hydraulic power without exceeding design limits. Clockwise rotation, labeled as direction R, simplifies alignment with prime movers. The EP3 proportional electric control accepts a 12 V signal for remote swashplate positioning, and a minimum speed of 500 rpm keeps hydrostatic bearings lubricated during low-flow operation.
An integrated boost stage feeds charge oil to the main circuit; its displacement is 19.6 cm3 per revolution and it sustains a nominal charge pressure of 25 bar to prevent inlet cavitation. The boost circuit can rise to 40 bar during cold start or transient demand, while overall system peak pressure is limited to 450 bar to handle dynamic loads. A torque of 573 Nm is produced at 400 bar for direct coupling to diesel engines or electric motors, and intermittent overspeed up to 3800 rpm is permitted during short acceleration phases. The electronic control requires at least 20 bar above case pressure to move the swashplate, guaranteeing responsive volume adjustment. A case oil volume of 1.5 L stores leakage flow, assisting internal cooling and channeling contaminants to external filtration before recirculation.
Technical Specifications
Boost Pump Maximum Pressure
40 bar
Boost Pump Nominal Pressure
25 bar
Case Volume
1.5 l
Control Type
EP3 (Proportional Electric, 12 V)
Direction Of Rotation
R (Clockwise)
Displacement (boost Pump)
19.6 cm3/rev
Displacement (variable Pump)
90 cm3/rev
Flow At Nominal Speed (vg Max)
275 l/min
Max Speed (intermittent)
3800 rpm
Maximum Pressure
450 bar
Min Control Pressure (ep)
20 bar (above case)
Minimum Speed
500 rpm
Nominal Pressure
400 bar
Nominal Speed
3050 rpm
Power At 400 Bar
183 kW
Torque At 400 Bar
573 Nm
1620 Old Apex Road
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