Bosch Rexroth | A10VO28DFR31RPSC62N00-SO97
A10VO28DFR/31RPSC62N00 SO97
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The A10VO28DFR/31RPSC62N00 SO97 pump belongs to the A10VSO Variable Pumps series produced by Bosch Rexroth for hydraulic automation where precise pressure and flow regulation are needed. It uses DFR pressure-flow control so outlet flow adapts to changing load conditions. A fixed displacement of 28 cm³ per revolution supports accurate volumetric output. At 1800 rpm the pump delivers 13.3 gpm, and maximum rated flow rises to 22 gpm at nominal speed for higher demand circuits. The nominal shaft speed is 3000 rpm, while operation can extend to 3600 rpm at reduced displacement to match faster prime movers. Continuous working pressure is limited to 4000 psi to protect internal components, yet short excursions to 5100 psi are permissible during transient events without impairing service life.
The control orifice maintains a differential pressure of 200 psi, ensuring predictable swashplate response under dynamic load changes. Shaft power reaches 52 hp at nominal speed, and a torque capacity of 92 lb-ft at 4100 psi provides starting force for heavy actuators. Plumbing interfaces are standardized for installation: the case drain uses a 3/4-16 UNF-2B thread, and the pilot line connects through a 7/16-20 UNF-2B port for remote compensator signals. Discharge flow exits through an SAE J518 3/4-inch flange, while inlet oil enters via an SAE J518 1 1/4-inch flange to reduce suction velocity and cavitation risk. These characteristics enable the pump to supply stable energy to cylinders, motors, and proportional valves across industrial machinery.
Technical Specifications
Control Type
DFR (Pressure Flow Control)
Differential Pressure (standard)
200 psi (14 bar)
Displacement
28 cm³/rev (1.71 in³/rev)
Drain Port Thread
3/4-16 UNF-2B
Flow At 1800 Rpm
13.3 gpm (50 L/min)
Max Flow At Nnom
22 gpm (84 L/min)
Max Power At Nnom
52 HP (39 kW)
Max Speed (vg<vgmax)
3600 rpm
Max Torque At 4100 Psi
92 lb-ft (125 Nm)
Max Working Pressure
4000 psi (280 bar)
Nominal Speed (vgmax)
3000 rpm
Peak Pressure
5100 psi (350 bar)
Pilot Port Thread
7/16-20 UNF-2B
Pressure Port Size
SAE J518 3/4 in
Suction Port Size
SAE J518 1 1/4 in
1620 Old Apex Road
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