Bosch Rexroth | A10VSO45DFR131RPPA12K26
A10VSO45DFR1/31RPPA12K26
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The A10VSO45DFR1/31RPPA12K26 pump is part of the A10VSO Variable Pumps series developed by Bosch Rexroth for hydraulic automation systems that need adjustable flow delivery. The flow control circuit is set to a differential pressure of 200 psi, so the compensator maintains stable output under changing load. Clockwise rotation aligns with common engine drives. A displacement of 45 cm³ per revolution defines the theoretical volume moved each shaft turn. Maximum flow deviation is limited to 0.50 gpm, giving predictable performance. Hysteresis in the flow controller does not exceed 60 psi, keeping pressure shifts small. At 1,800 rpm the unit supplies 21.4 gpm, and at its nominal speed the flow reaches 30.9 gpm for higher demand. When displacement is reduced below maximum, the pump can run up to 3,100 rpm without surpassing mechanical limits.
Continuous operation is rated for 4,100 psi (280 bar), providing a high working margin for machinery. Nominal speed at full displacement is 2,600 rpm, establishing the upper boundary for drive selection. The pump works in an open circuit, returning oil directly to the tank. It withstands peak pressure spikes of 5,100 psi (350 bar) during short overloads. Pilot control passages consume no more than 0.8 gpm, a value that must be returned to the reservoir. Driving the shaft at nominal speed requires 74 hp (55 kW) from the prime mover, and at 280 bar the transmitted torque reaches 148 lb-ft (200 N·m). The assembly weighs 55 lb (25.1 kg) with a through-drive adapter, allowing single-person handling while still supporting tandem pump arrangements.
Technical Specifications
Differential Pressure Setting (flow)
200 psi
Direction Of Rotation
Clockwise
Displacement
45 cm3/rev
Flow Deviation Max
0.50 gpm
Hysteresis Pressure Max (flow Control)
60 psi
Max Flow @ 1800 Rpm
21.4 gpm
Max Flow @ Nominal Speed
30.9 gpm
Max Permissible Speed (vg < Vg Max)
3100 rpm
Nominal Pressure
4100 psi (280 bar)
Nominal Speed (at Vg Max)
2600 rpm
Operating Mode
Open Circuit
Peak Pressure
5100 psi (350 bar)
Pilot Fluid Consumption Max
0.8 gpm
Power @ Nominal Speed
74 HP (55 kW)
Torque @ 280 Bar
148 lb-ft (200 Nm)
Weight With Through Drive
55 lb (25.1 kg)
1620 Old Apex Road
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