Bosch Rexroth | AA10VSO28DFR31R-PKC62K03
AA10VSO28DFR/31R-PKC62K03
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The AA10VSO28DFR/31R-PKC62K03 belongs to the A10VSO Variable Pumps series produced by Bosch Rexroth and is intended for closed-loop hydraulic automation. It employs DFR pressure-flow control, which varies the swashplate so that circuit pressure and delivery are regulated simultaneously. A displacement of 28 cm³ per revolution specifies the fluid volume moved each shaft turn, directly setting pump output at any speed. The parallel keyed drive shaft conforming to ISO 3019-1 secures torque transfer to the prime mover, while clockwise rotation aligns with common engine layouts. Operation with HLP mineral oil to DIN 51524-2 supports compatibility with standard hydraulic fluids. Continuous duty is limited by a nominal pressure of 4,100 psi, and the DFR Δp standard setting of 200 psi defines the differential at which the controller reduces flow. At 1,800 rpm and full displacement, the pump delivers 13.3 gpm, and it draws 31 hp at that point so motor sizing can be matched.
A maximum flow of 22 gpm at rated speed provides reserve capacity for short demand peaks, and a permitted speed ceiling of 3,600 rpm allows use on high-speed diesel or electric drives. When the swashplate remains at full displacement, speed must stay below 3,000 rpm to maintain adequate inlet conditions. Maximum power of 52 hp indicates the upper limit of mechanical input the shaft can accept, while 92 lb-ft of torque at 280 bar defines coupling requirements. Transient events can reach 5,100 psi, which sets the absolute pressure boundary for system protection valves. Delivery accuracy is supported by a flow deviation not exceeding 0.30 gpm, maintaining consistent actuator velocity during precise motion cycles.
Technical Specifications
Control Type
DFR Pressure-Flow
Dfr Δp Standard Setting
200 psi (14 bar)
Displacement
28 cm³/rev (1.71 in³/rev)
Drive Shaft Type
Parallel Keyed (ISO 3019-1)
Flow At 1800 Rpm (vg Max)
13.3 gpm (50 l/min)
Flow Deviation Δqv Max
0.30 gpm (1.0 l/min)
Hydraulic Fluid
HLP Mineral Oil (DIN 51524-2)
Max Flow (nnom, Vg Max)
22 gpm (84 l/min)
Max Permitted Speed
3600 rpm
Max Power (nnom, Vg Max)
52 HP (39 kW)
Max Speed (at Vg Max)
3000 rpm
Max Torque (280 Bar)
92 lb-ft (125 Nm)
Maximum Pressure
5100 psi (350 bar)
Nominal Pressure
4100 psi (280 bar)
Power At 1800 Rpm (vg Max)
31 HP (24 kW)
Rotation Direction
Clockwise
1620 Old Apex Road
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