Variable Pump A4VSO

The Rexroth A4VSO series represents the benchmark in high-pressure, variable displacement technology for industrial hydraulics. This swashplate-type axial piston pump is engineered for demanding mobile and industrial applications, delivering exceptional power density with maximum pressures up to 400 bar. Its core strengths lie in outstanding total efficiency, achieved through optimized flow paths and precision components, which translates directly into lower energy consumption and operating costs. The pump offers unparalleled flexibility with a wide range of control options-including pressure (HD), power (LV), and electro-proportional (EL) controls-to perfectly match diverse system requirements for load-sensing, constant power, or intelligent automation. Renowned for robust construction and high reliability even in harsh conditions, the compact A4VSO is the ideal, efficient power source for critical applications such as excavators, cranes, injection molding machines, and test stands.

Control Overview

Pressure control DR

Adjust the approximately maximum pressure in the hydraulic system

Set the range to 20.. 350 bar

Optional：

Remote Control (DRG)

Pressure control DP for parallel operation

It is suitable for pressure control when multiple axial piston pumps A4VSO are working in parallel.

Optional：

Flow Control (DPF)

Flow control FR

Optional：

Maintain a constant flow rate in the continuous pressure system (volume)

Remote pressure

The throttle holes (FR1,FRG1) in the blocked oil port X of the control box FRG

Pressure and Flow Control (DFR)

This control can be derived from prior control under conditions of low variation (flow rate). The traffic of Liyue remains constant. The mechanical adjustable pressure control is excellent

Optional：

Blockage: Approximately the throttle hole (DFR1) in the oil port X