ATUS-A4VG Series Axial Piston Variable Pump

Typical applications: concrete pump trucks, heavy hydraulic flatbed trucks, closed hydraulic systems
Common specifications displacement: 28, 40, 56, 71, 90, 125, 180, 250 cc;
Nominal pressure: 400 bar;
Peak pressure: 450 bar;
Swash plate structure axial piston variable pump, used for hydrostatic transmission in closed circuit;
The flow is proportional to the drive speed and displacement and can be adjusted steplessly;
The output flow increases from zero to the maximum value with the swash plate swing angle;
The swash plate can smoothly change the flow direction by swinging past the neutral position;
A variety of highly compatible control devices provide various control and regulation functions;
Each high-pressure side is equipped with two relief valves to prevent the hydrostatic transmission (pump and motor) from overloading;
The relief valve also has the function of a replenishment valve - the built-in replenishment pump is used as an oil supply and control pump;
The maximum replenishment pressure is limited by the built-in replenishment relief valve;
The built-in pressure cut-off valve is standard;


Common control valves:
DG - Direct hydraulic control
EZ - Electrical two-point control with switching solenoid
HD - Hydraulic control related to pilot pressure
HW - Mechanical servohydraulic control
HA - Automatic control related to high pressure
DA - Hydraulic control related to speed
EP - Electrical control with proportional solenoid