Rexroth hydraulic pump A4VG28/40/56/71/90/125/180/250, complete models

Rexroth Axial Piston Variable Pump A4VG Description

Axial piston variable pump A4VG series 32

- High-pressure pumps for closed circuit applications

- Sizes 28 … 125, e.g. A4VG 28 NVD**/32R, A4VG 40 HD3D**/32R, A4VG 56 HWD**/32R, A4VG 71 DA1D**/32R, A4VG 90 EZ1D**/32R, A4VG 125 EP4D **/32R.

- Nominal pressure 400 bar

- Maximum pressure 450 bar

Axial piston variable pump A4VG series 40

- High-pressure pump for closed circuits up to 500 bar

- Sizes 110 … 280, A4VG 110 DA**/40R, A4VG 125 HW**/40R, A4VG 145 EP**/40R, A4VG 175 EZ1**/40R, A4VG 210 EZ2**/40R, A4VG 280 EP4* */40R.

- Nominal pressure 450 bar

- Maximum pressure 500 bar

A4VG pump master control:

Depending on the type of control valve on the pump, the A4VG pump has a variety of control methods. The following are commonly used control methods:

- HW manual control: pump displacement is proportional to the angle of the control valve handle.

- EP electric proportional control: the pump displacement is proportional to the current signal of the proportional solenoid valve.

-HD hydraulic control type: pilot hydraulic control, the displacement of the pump is proportional to the pilot pressure.

The A4VG from Bosch Rexroth is ideally suited for different control and regulation functions, with built-in pressure reducing and boosting valves.

feature:

Swash plate variable axial piston pump for hydrostatic closed circuit transmission

The flow rate is proportional to the drive speed and displacement, and can be varied steplessly

The output flow rate increases from 0 to the maximum value as the rotation angle of the swash plate increases.

Flow direction changes smoothly as the swash plate moves through the intermediate position

Various highly adaptable controls available for different control and regulation functions

The pump is equipped with two pressure reducing valves on the high pressure port to protect the hydrostatic transmission (pump and motor) from overloading

High pressure relief valve can also be used as a boost valve

Integrated booster pump serves as oil feed and control oil pump

Maximum boost pressure is limited by built-in boost pressure reducing valve

Integral pressure cut-off is standard