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.
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