A7VO Axial piston variable pump , Open circuit High pressure pumps

Control device

LR – Power controller without power override
The power controller regulates the displacement of the pump depending on the operating pressure so that a given drive power is not exceeded at constant drive speed.
The precise control with a hyperbolic control characteristic, provides an optimum utilization of available power.
The operating pressure acts on a rocker via a measuring spool which moves with the control. An externally adjustable spring force counteracts this, it determines the power setting.

LRD – Power controller with pressure cut-off
The pressure cut-off is a pressure control which adjusts the displacement of the pump back to Vg min after reaching the set pressure command value.
This function overrides the power controller, i.e. the power control function is executed below the pressure command value.

Technical data

Sizes 28 to 160.

Nominal pressure 350 bar.

Maximum pressure 400 bar.

Open circuit.

Features

Variable pump with axial tapered piston rotary group of bent-axis design, for hydrostatic drives in open circuit.

For use in mobile and stationary applications.

Flow is proportional to the drive speed and displacement.

The flow can be steplessly changed by adjusting the bent axis.

Wide selection of control devices.

Compact, robust pump with a long service life.