Bosch Rexroth | AA4VG90EP4D132R-NSF52F001DP
AA4VG90EP4D1/32R-NSF52F001DP
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The AA4VG90EP4D1/32R-NSF52F001DP pump belongs to the AA4VG Variable Pumps series and is produced by Bosch Rexroth for closed-loop hydraulic automation. Its variable displacement of 90 cm³ per revolution lets the user modulate flow to match load demand. At the nominal speed of 3050 rpm the unit provides 275 l/min, a capacity suited to propel hydrostatic drives in mobile equipment. Clockwise rotation synchronizes with common engine outputs, while the SAE J744 2+4-hole flange eases attachment to gear housings. A 24 V EP4 electro-proportional control governs the swashplate to adjust output without manual intervention. The internal charge stage moves 19.6 cm³ per revolution to sustain case pressure. An NBR shaft seal backed by an FKM ring keeps oil contained under varying temperature and pressure conditions.
The pump supports a continuous working pressure of 400 bar and endures peaks to 450 bar, allowing high power density in compact installations. At 400 bar it draws 573 Nm from the prime mover and converts this input to 183 kW of usable hydraulic power. A pilot line limited to 40 bar permits stable command of the displacement actuator without excess load on control valves. Intermittent speed capability reaches 3800 rpm so short bursts of extra flow are available during acceleration or steering corrections. Twin working ports sized 1 in according to SAE J518 accept standard high-pressure fittings, completing a package configured for robust, high-pressure closed circuit operation.
Technical Specifications
Boost Pump Displacement
19.6 cm³/rev
Control Voltage (ep4)
24 V
Direction Of Rotation
Clockwise
Displacement
90 cm³/rev
Flow At Nominal Speed
275 l/min
Max Speed (intermittent)
3800 rpm
Maximum Pressure
450 bar
Mounting Flange
SAE J744 2+4-Hole
Nominal Pressure
400 bar
Nominal Speed
3050 rpm
Pilot Pressure Port Max
40 bar
Power At 400 Bar
183 kW
Sealing Material
NBR (shaft seal FKM)
Torque At 400 Bar
573 Nm
Working Port A/b Size
1 in (SAE J518)
1620 Old Apex Road
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