Bosch Rexroth Radial Piston Pump - PR4

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Hydraulic pumps of type PR4 are valve-controlled, self-priming radial piston pumps with constant displacement. The pistons are arranged radially to the eccentric shaft. In downward movements of the piston, the working space in the cylinder is enlarged. The resulting underpressure opens the suction valve. This establishes the connection from the suction chamber to the working space. In upward movements of the piston, the suction valve is closed and the pressure valve is opened. The hydraulic fluid now flows to the system via the pressure connection.

The sizes of the 3X series radial piston pump comprise: 1.60-700, 2.00-700, 2.50-700, 3.15-500, 4.00-700, 5.00-500, 6.30-500, 8.00-500, 10.00-500, 16.00-500, and 20.00-500. The pump has a maximum operating pressure of 700 bar and a maximum displacement of 19.43 cm3.

Some of the features of the radial piston motor include:

  • Fixed displacement.
  • Self-priming.
  • Favorable grading of the 14 sizes for perfect device design.
  • Long life cycle thanks to hydrodynamically lubricated plain bearings.
  • Optionally in the standard delivery range: Several pressure ports with different cylinder combinations.

Bosch Rexroth PR4

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