A4VG_40 Series High Pressure Piston Pumps

Specifications

28、40、56、71、90、125、180、250

Working pressure

Nominal pressure 40 MPa, peak pressure 45 MPa

Control mode:

NV type, no control device

DG-hydraulic control, direct control

EZ-Electric Two-Point Control, Switched Electromagnet

HD-hydraulic control, related to pilot pressure

HW-Hydraulic Control, Mechanical Servo

EP-Electrical Control with Proportional Electromagnet

DA - Hydraulic control, related to deceleration

Characteristic

- Swashplate axial plunger variable pump for closed circuit hydrostatic transmission.

- Flow rate is proportional to driving speed and displacement.

- The flow rate increases from zero to its maximum with the swashplate swing angle.

- The liquid flow direction can be changed smoothly by making the swashplate swing over the middle.

- Variable modes can be easily matched with different control and regulation systems.

- The pump is equipped with two relief valves at the high-pressure oil side to protect the hydrostatic transmission (pump and motor) from overloading.

- High pressure relief valve also functions as filing valve.

- Built-in auxiliary pumps are used as refueling pumps and control pumps.

- The maximum filling pressure is limited by a built-in filling relief valve.

- Full series with built-in pressure shut-off valves.