Bosch Rexroth | AA10VSO28DFR31R-PSC62K01
AA10VSO28DFR/31R-PSC62K01
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The AA10VSO28DFR/31R-PSC62K01 pump is part of the A10VSO Variable Pumps series from Bosch Rexroth and provides adjustable flow for hydraulic automation circuits. A geometric displacement of 28 cm³ per revolution defines the theoretical volume sent to the system with each shaft turn, and the specified clockwise rotation matches common prime-mover arrangements. When driven at 1800 rpm with the swash plate at maximum stroke, the pump outputs 13.3 gpm; raising speed to the nominal value increases delivery to 22 gpm, covering typical actuator demands. The differential pressure regulator is set to 200 psi, keeping flow deviation within 0.30 gpm so positioners receive stable supply. Internal design allows case pressure up to 30 psi, requiring a low-back-pressure drain line, while the pressure housing itself tolerates a maximum working limit of 5100 psi for use in high-force equipment.
During normal operation the unit is intended to run at a system pressure of 4100 psi, where it can transmit 52 hp to the hydraulic medium and impose 92 lb-ft of torque on the drive shaft. With the displacement fully open, continuous speed is limited to 3000 rpm, yet the assembly permits 3600 rpm when the displacement is reduced, giving designers latitude to match engine and pump speeds. Reliable inlet conditions require absolute suction pressure not less than 12 psi, and the high-pressure port must maintain at least 145 psi to prevent internal collapse of hydrostatic bearings. Total weight is 43 lb with the through-drive configuration, allowing technicians to mount tandem stages without additional lifting equipment.
Technical Specifications
Case Pressure Max (abs)
30 psi
Differential Pressure (dfr)
200 psi
Direction Of Rotation
Clockwise
Flow At 1800 Rpm And Vg Max
13.3 gpm
Flow At Nnom And Vg Max
22 gpm
Flow Deviation Max (dfr)
0.30 gpm
Geometric Displacement
28 cm³/rev
Max Permissible Speed (vg < Vg Max)
3600 rpm
Maximum Pressure
5100 psi
Minimum High-pressure Side (abs)
145 psi
Minimum Suction Pressure (abs)
12 psi
Nominal Pressure
4100 psi
Power At Nnom (Δp 4100 Psi)
52 hp
Rotational Speed At Vg Max
3000 rpm
Torque At Δp 4100 Psi
92 lb-ft
Weight With Through Drive (k.)
43 lb
1620 Old Apex Road
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