Axial Piston Variable Pump-close Circuit, K4VG

K4VG (Replacement for A4VG Series 32)Replacement hydraulic pump for A4VG series 32 axial piston variable pump

  • High pressure pump for closed circuits
  • size: 28-250
  • Nominal pressure 400 bar
  • Maximum pressure 450 bar
  • Closed circuits
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Features
  • Integrated auxiliary pump for boost and pilot oil supply
  • Change the flow direction smoothly by moving the swashplate through the neural position
  • High-pressure relief valve with integrated boost function
  • With adjustable pressure cut-off
  • Boost-pressure relief valve
  • Through drive for mounting of further pumps up to the same nominal size
  • Large variety of controls
  • Swashplate design
Technical Parameters
Size 28 40 56 71 90 125 180 250
Displacement Vg max cm³ 28 40 56 71 90 125 180 250
geometric,per revolution
Nominal pressure pnom bar 400 400 400 400 400 400 400 400
Max. pressure pmax bar 450 450 450 450 450 450 450 450
Max. speed at Vg max nnom rpm 4250 4000 3600 3300 3050 2850 2500 2400
Intermittent 1) nmax rpm 5000 5000 4500 4100 3800 3450 3000 2700
Flow at Vg max and nnom qV nom l/min 119 160 202 234 275 356 450 600
Power at qV nom and ΔPnom P kW 79 107 134 156 183 238 300 400
Torque at V g max and ΔPnom M Nm 178 255 357 452 573 796 1146 1592
Weight (approx.) m kg 29 31 38 50 60 80 101 156
1)At Δp = 70 ~ 150 bar or Δp <300 bar and t <0.1 s
2)Δpnom = 400 bar
Description

K4VG swashplate axial piston pump is intended for medium-to-high pressure applications. With its diversified design, high performance and extensive range of controls, axial piston variable pump proves a perfect solution for applications in the mobile sector.
The K4VG is an axial piston variable pump with swashplate design for hydrostatic drives in closed circuits. The flow of the variable displacement pump is proportional to the drive speed and displacement, which can be steplessly changed by adjusting the cradle.
The pistons are axially arranged to the drive shaft in its axial piston unit with swashplate design. Hydraulic fluid flows from the hydraulic pump to the motor and directly back to the pump in a closed circuit. Depending on which side is under load, the unit has a high-pressure and a low-pressure side.
The K4VG axial piston variable pumps are mainly used in truck-mounted concrete pumps cotton pickers, agricultural tractors, mining machines and other industrial machinery.

Applications
  • Truck-mounted Concrete PumpTruck-mounted Concrete Pump
  • Cotton pickerCotton picker
  • Farm tractorFarm tractor
  • Mining machineMining machine
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Guangdong KEDA Hydraulic Technology Co., Ltd. is an industry leader in producing high-pressure piston pumps and high-speed motors, leveraging our core technology to provide superior technical solutions for customers worldwide. Our products including hydraulic pumps, hydraulic motors and hydraulic spare parts are used across a wide range of industries, including metallurgy, forging, TBM, building materials, pile drivers, mobile machinery, and marine engineering. We have domestic and international sales and service bases to ensure fast and satisfactory services for all our customers. As part of KEDA Industrial Group Co., Ltd. (stock code 600499), we strive to offer innovative solutions that exceed expectations every time.

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