Bosch Rexroth | A10VSO18DFR31R-PPA12K01
A10VSO18DFR/31R-PPA12K01
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The A10VSO18DFR/31R-PPA12K01 variable pump is manufactured by Bosch Rexroth and belongs to the A10VSO Variable Pumps series. It provides regulated hydraulic power to automation circuits that need predictable pressure and flow. A DFR pressure-flow control keeps both values stable, and the compensator differential is fixed at 200 psi so the swashplate reacts quickly to load shifts. The rotating group displaces 18 cm³ each revolution, and at 1800 rpm with full displacement the outlet reaches 8.5 gpm. Flow variation is limited to 0.20 gpm, maintaining uniform actuator speed. The unit runs on HLP mineral oil conforming to DIN 51524-2, and continuous service is allowed up to 3300 rpm at nominal displacement. Its working circuit is rated for 4100 psi, allowing the pump to serve high-pressure tooling and clamping functions.
When driven at nominal speed the pump can supply a maximum of 15.6 gpm, giving reserve capacity for peak demand. Intermittent operation may reach 3900 rpm without exceeding mechanical limits. Shaft power draw is 38 hp at 4100 psi, while the drive coupling must withstand 59 lb-ft of torque at 280 bar. Casing and ports tolerate pressure spikes up to 5100 psi, and fluid temperature may rise to 230 °F (110 °C) before cooling is required. A through-drive hub with a 5/8-inch, 9-tooth, 16/32DP spline designated K01 lets a secondary pump be piggy-backed on the same prime mover. The assembly weighs 30 lb (13.8 kg), which simplifies installation and service in confined hydraulic power units.
Technical Specifications
Control Type
DFR (Pressure-Flow)
Dfr Differential Pressure (standard)
200 psi
Displacement (per Rev)
18 cm3
Flow At 1800 Rpm (vg Max)
8.5 gpm
Flow Deviation Δqv Max
0.20 gpm
Hydraulic Fluid Type
HLP Mineral Oil (DIN 51524-2)
Max Flow (at Nnom, Vg Max)
15.6 gpm
Max Fluid Temperature
230 °F (110 °C)
Max Permissible Speed
3900 rpm
Max Power (4100 Psi, Nnom)
38 HP
Max Torque (280 Bar)
59 lb-ft
Maximum Pressure
5100 psi
Nominal Pressure
4100 psi
Nominal Speed (at Vg Max)
3300 rpm
Through-drive Hub
5/8 in 9T 16/32DP (K01)
Weight With Through Drive
30 lb (13.8 kg)
1620 Old Apex Road
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