Bosch Rexroth | AA4VG180EP4DT132R-NXD52F721DH-S
AA4VG180EP4DT1/32R-NXD52F721DH-S
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The AA4VG180EP4DT1/32R-NXD52F721DH-S is a variable pump manufactured by Bosch Rexroth within the AA4VG Variable Pumps series. It delivers adjustable flow for closed-loop hydraulic drives used in automation. The EP4 proportional solenoid starts swashplate movement at 200 mA, and full displacement occurs at 600 mA, giving the controller a defined operating span. Coil resistance is 22.7 Ω, which sets the electrical load when supplied with the common 24 V machine voltage. A 0.77 A current limit protects the solenoid from thermal stress, while the 100 % duty cycle allows continuous modulation without rest periods. A 100 Hz dither signal reduces stiction for smoother response. The hydraulic section operates at a nominal pressure of 400 bar (5 800 psi), supporting high-power work functions in mobile equipment.
For peak events the pump tolerates 450 bar (6 500 psi), and the same 450 bar rating applies to the measuring port so diagnostic sensors can be fitted directly. The pilot pressure port handles up to 40 bar to maintain stable control, and inlet flow must stay below 5 bar absolute to prevent cavitation. Seal temperature limits are 110 °C for FKM versions and 85 °C for NBR versions, ensuring material compatibility with hot oil. Overall circuit temperature may reach 115 °C before derating is required. These pressure and temperature capabilities enable reliable displacement control across demanding hydraulic automation tasks.
Technical Specifications
Control Current End (ep4)
600 mA
Control Current Start (ep4)
200 mA
Current Limit (ep4)
0.77 A
Dither Frequency (ep4)
100 Hz
Duty Cycle (ep4)
100%
Fkm Shaft Seal Max Temperature
110 °C
Max Circuit Temperature
115 °C
Maximum Pressure
450 bar (6500 psi)
Measuring Port Max Pressure
450 bar
Nbr Seal Max Temperature
85 °C
Nominal Pressure
400 bar (5800 psi)
Nominal Resistance (ep4)
22.7 Ω
Pilot Pressure Port Max
40 bar
Solenoid Voltage (ep4)
24 V
Suction Port Max Pressure
5 bar abs
1620 Old Apex Road
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