Bosch Rexroth | AA4VG90HWDL132R-NSF52K021E-S
AA4VG90HWDL1/32R-NSF52K021E-S
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The AA4VG90HWDL1/32R-NSF52K021E-S pump belongs to the AA4VG Variable Pumps series from Bosch Rexroth and is intended for hydraulic automation that requires adjustable flow in closed circuits. The geometric displacement is 90 cm³ per revolution, enabling precise volume control. At its nominal speed of 3050 rpm the pump supplies 275 l/min, yet it can operate down to 500 rpm for reduced output. Continuous running is limited to 3300 rpm, and the housing tolerates a nominal pressure of 400 bar with peak loads up to 450 bar. A case volume of 1.5 liters supports internal oil circulation and heat removal.
The integrated charge stage displaces 19.6 cm³ per revolution to keep the inlet flooded and avert cavitation. Intermittent operation is permissible up to 3800 rpm, provided the drive shaft torque stays below 1640 Nm, while through-drive arrangements are rated for 822 Nm. At a differential pressure of 400 bar the unit converts 183 kW of mechanical power into hydraulic energy and delivers 573 Nm of shaft torque. Dynamic response is influenced by a rotary group inertia of 0.0149 kg·m² and an allowable angular acceleration of 18000 rad/s², giving the pump the stiffness needed for high-performance traction and work circuits.
Technical Specifications
Boost Pump Displacement
19.6 cm³ (1.20 in³)
Case Volume
1.5 l (0.40 gal)
Displacement (geometric)
90 cm³/rev (5.49 in³/rev)
Flow At Nominal Speed
275 l/min (72.6 gpm)
Max Angular Acceleration
18000 rad/s²
Max Input Torque (drive Shaft)
1640 Nm (1210 lb-ft)
Max Speed (intermittent)
3800 rpm
Max Speed (limited)
3300 rpm
Max Through-drive Torque
822 Nm (606 lb-ft)
Maximum Pressure
450 bar (6500 psi)
Minimum Speed
500 rpm
Nominal Pressure
400 bar (5800 psi)
Nominal Speed
3050 rpm
Power At Δp 400 Bar
183 kW (245 hp)
Rotary Group Inertia
0.0149 kg·m² (0.3536 lb·ft²)
Torque At Δp 400 Bar
573 Nm (423 lb-ft)
1620 Old Apex Road
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