Bosch Rexroth | AA4VG250EP4D132R-NSD60F001DH
AA4VG250EP4D1/32R-NSD60F001DH
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The AA4VG250EP4D1/32R-NSD60F001DH is a variable pump built by Bosch Rexroth for the AA4VG Variable Pumps series and supplies adjustable hydraulic energy for automated closed-circuit drives. A geometric displacement of 250 cm³ per revolution offers high volumetric throughput, while the unit reaches 600 l/min at maximum displacement and rated speed to feed large actuators. Continuous operation is permitted up to 2400 rpm, and stable delivery begins at 500 rpm for low-flow conditions. The rotary group can accelerate at 6700 rad/s², and its moment of inertia of 0.0983 kg·m² keeps drive load moderate during rapid speed changes. Clockwise rotation aligns with common right-hand prime movers, and the EP4 electronic controller accepts a 24 V DC supply so it integrates with standard vehicle or industrial control networks.
A nominal operating pressure of 400 bar supports typical hydrostatic work cycles, and the housing withstands peak demands up to 450 bar without loss of function. At the nominal pressure the shaft must transmit 1590 Nm of torque, corresponding to a power requirement of 400 kW. An internal boost stage displaces 52.5 cm³ per revolution to maintain charge pressure and prevent cavitation. The case tolerates up to 10 bar back pressure, guiding the design of the drain circuit. An NBR shaft seal reinforced by FKM contains the working fluid under elevated temperature, and a filling capacity of 6.3 L defines the oil volume needed to prime the pump before start-up.
Technical Specifications
Angular Acceleration Max
6700 rad/s²
Boost Pump Displacement
52.5 cm³
Case Pressure Max (peak)
10 bar
Control Voltage (ep4)
24 V DC
Direction Of Rotation
Clockwise (R)
Filling Capacity
6.3 L
Flow @ Vgmax, N Cont
600 l/min
Geometric Displacement
250 cm³/rev
Max Speed (continuous)
2400 rpm
Maximum Pressure
450 bar
Minimum Speed
500 rpm
Moment Of Inertia (rotary Group)
0.0983 kg·m²
Nominal Pressure
400 bar
Power @ 400 Bar
400 kW
Sealing Material
NBR (shaft seal FKM)
Torque @ 400 Bar
1590 Nm
1620 Old Apex Road
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