Bosch Rexroth | AA4VG90EP3D132L-NUF52F071SH-S
AA4VG90EP3D1/32L-NUF52F071SH-S
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The AA4VG90EP3D1/32L-NUF52F071SH-S is part of the AA4VG Variable Pumps series produced by Bosch Rexroth for closed-loop hydraulic automation. It supplies variable flow by adjusting its 90 cm³ displacement per revolution, allowing compact drives to meet changing load demands. At nominal speed the pump delivers 275 l/min, giving cylinders and motors ample oil without auxiliary boosters. A nominal pressure capability of 400 bar supports high-force implements, and the shaft must handle 183 kW when the circuit runs at that pressure. Resulting torque reaches 573 Nm, so couplings and mounts must be sized accordingly. Short duty peaks are supported up to 3800 rpm, increasing power density when space is limited. The EP3 electronic control employs a 12 V solenoid, while an initial 400 mA current moves the swashplate smoothly off center.
The integrated boost stage displaces 19.6 cm³ per revolution to keep the case flooded and prevent cavitation during rapid flow changes. A 1.5 l internal case volume stores oil that dampens pressure pulsations and aids heat removal. Full-stroke control requires 1200 mA, providing proportional positioning across the displacement range. Inlet conditions must stay between 0.8 bar abs and 5 bar abs to avoid aeration and exceed seal limits. Peak working pressure reaches 450 bar, and the regulator can track load shifts at 9000 bar/s to maintain stable actuator motion. The bare unit weighs 60 kg, allowing installation on mobile frames or industrial bases without excessive structural reinforcement.
Technical Specifications
Boost Pump Displacement
19.6 cm3
Case Volume
1.5 l
Control Current At Vg Max (ep3)
1200 mA
Control Current Start (ep3)
400 mA
Displacement (vg Max)
90 cm3
Flow At Nominal Speed (vg Max)
275 l/min
Max Speed (intermittent)
3800 rpm
Max Suction Pressure
5 bar abs
Maximum Pressure
450 bar
Min Suction Pressure
0.8 bar abs
Nominal Pressure
400 bar
Power At Nominal Speed (400 Bar)
183 kW
Rate Of Pressure Change (ra Max)
9000 bar/s
Solenoid Voltage (ep3)
12 V
Torque At Vg Max (400 Bar)
573 Nm
Weight (without Through Drive)
60 kg
1620 Old Apex Road
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