Bosch Rexroth | AA4VG90EP3D132L-NSF52F001DP
AA4VG90EP3D1/32L-NSF52F001DP
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The AA4VG90EP3D1/32L-NSF52F001DP variable pump belongs to the AA4VG Variable Pumps series and is manufactured by Bosch Rexroth for closed-circuit hydraulic drives. It offers a geometric displacement of 90 cm³ per revolution, setting the baseline for volume delivery each shaft turn. At its nominal speed of 3050 rpm the unit provides 275 L/min, allowing high flow systems to maintain actuator velocity. The pump can run down to 500 rpm, which supports low-speed control during equipment start-up or precise positioning. Rotation is counter-clockwise when viewed from the shaft end, so matching motor orientation is required. Suction port pressure must remain at or above 0.8 bar absolute to avoid cavitation in the inlet gallery. Continuous operation is rated at 400 bar, and short pressure spikes can reach 450 bar without damage.
A built-in boost stage displaces 19.6 cm³ per revolution to charge the closed loop and feed the control pistons. Electro-proportional regulation functions when at least 20 bar above case pressure is present in the control line. The solenoid circuit is designed for 12 V, with the swashplate beginning to move at 400 mA and reaching full stroke at 1200 mA, giving linear displacement control. When the outlet pressure is 400 bar the pump absorbs 183 kW of mechanical power from the prime mover and imposes 573 Nm of torque on the drive shaft. These electrical and hydraulic operating limits define the pump’s integration requirements within mobile or industrial hydrostatic transmissions; they support smooth load sensing and prevent over-stroking under variable demand.
Technical Specifications
Boost Pump Displacement
19.6 cm3/rev
Control Pressure Min (ep)
20 bar (above case)
Direction Of Rotation
Counter-Clockwise
End Of Control Current (ep3)
1200 mA
Flow At Nominal Speed
275 L/min
Geometric Displacement
90 cm3/rev
Maximum Pressure
450 bar
Min Suction Port Pressure
0.8 bar (abs)
Minimum Speed
500 rpm
Nominal Pressure
400 bar
Nominal Speed
3050 rpm
Power At 400 Bar
183 kW
Solenoid Voltage (ep3)
12 V
Start Of Control Current (ep3)
400 mA
Torque At 400 Bar
573 Nm
1620 Old Apex Road
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