Bosch Rexroth | AA4VG90EP4D132L-NSF52F001DP
AA4VG90EP4D1/32L-NSF52F001DP
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The AA4VG90EP4D1/32L-NSF52F001DP pump is manufactured by Bosch Rexroth as part of the AA4VG Variable Pumps series, serving closed-circuit hydraulic drives that require adjustable flow. Its geometric displacement is 90 cm³ per revolution, and at the nominal speed of 3050 rpm it supplies 275 l/min. The unit turns counter-clockwise, so port locations match this rotation. Under a nominal pressure of 400 bar it delivers 183 kW and produces 573 Nm of torque for high power density. The EP4 regulator runs on a 24 V control line and begins swashplate movement at 200 mA, allowing proportional flow control from minimum to maximum displacement.
The pump tolerates system peaks up to 450 bar and permits intermittent shaft speeds of 3800 rpm without overshooting thermal limits. Continuous suction pressure can be as low as 0.8 bar absolute, while cold starts are allowed down to 0.5 bar absolute to maintain inlet conditions during low-temperature operation. The charge circuit operates on a nominal boost pressure of 25 bar and withstands peaks to 40 bar, preventing cavitation across the working range. Flow modulation ends when the EP4 solenoid reaches 600 mA, completing the usable control window between the previously noted start current and this upper value.
Technical Specifications
Boost Pressure Maximum
40 bar
Boost Pressure Nominal
25 bar
Control Voltage (ep4)
24 V
Direction Of Rotation
Counter-Clockwise
Displacement (geometric)
90 cm3/rev
End Of Control Current (ep4)
600 mA
Flow At Nominal Speed
275 l/min
Maximum Pressure
450 bar
Maximum Speed (intermittent)
3800 rpm
Nominal Pressure
400 bar
Nominal Speed
3050 rpm
Power At 400 Bar
183 kW
Start Of Control Current (ep4)
200 mA
Suction Pressure Min (cold Start)
0.5 bar abs
Suction Pressure Min (continuous)
0.8 bar abs
Torque At 400 Bar
573 Nm
1620 Old Apex Road
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