Bosch Rexroth | AA10VSO28DFR31R-VKC62N00
AA10VSO28DFR/31R-VKC62N00
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The AA10VSO28DFR/31R-VKC62N00 pump belongs to the A10VSO Variable Pumps series from Bosch Rexroth and provides adjustable output for hydraulic automation circuits. It displaces 28 cm³ per revolution, letting the user modulate flow to match actuator demand. The unit withstands a nominal pressure of 4,100 psi (280 bar) for continuous duty and tolerates momentary peaks to 5,100 psi (350 bar) without damage. At nominal speed and maximum displacement it delivers 84 l/min, supplying sufficient oil for medium-sized servo loops. Shaft input power reaches 39 kW, enabling the pump to transmit substantial hydraulic energy to machinery. Clockwise rotation aligns with standard right-hand prime movers, and this orientation simplifies coupling arrangements in industrial power packs.
The housing contains 0.7 L of case volume so returning fluid can expand before it is drained, reducing aeration. The DFR regulator keeps a 200 psi (14 bar) differential across the orifice, maintaining stable motion even when load varies. Flow deviation for size 28 models is limited to 1.0 l/min, which helps achieve accurate positioning in proportional valve systems. The shaft can run up to 3,000 rpm at full displacement, while a reduced swashplate angle permits 3,600 rpm to improve efficiency under partial load. Output torque peaks at 125 N·m at 280 bar, giving the drive enough reserve to overcome static friction during starts. An FKM shaft seal contains high-temperature oil, and the bare weight of 18 kg allows single-person handling during installation. Working ports use ISO 6162 SAE flanges for straightforward connection to high-pressure manifolds.
Technical Specifications
Case Volume
0.7 L
Differential Pressure (dfr Standard)
200 psi (14 bar)
Displacement
28 cm³/rev
Flow Deviation (dfr, Size 28)
1.0 l/min (0.30 gpm)
Max Flow (at Nnom, Vg Max)
84 l/min
Max Pressure
5100 psi (350 bar)
Max Speed (at Vg Max)
3000 rpm
Max Speed (reduced Vg)
3600 rpm
Max Torque (at 280 Bar)
125 N·m
Nominal Pressure
4100 psi (280 bar)
Power (at Nnom, Vg Max)
39 kW
Rotation
Clockwise
Seal Material
FKM
Weight (without Through Drive)
18 kg
Working Ports
SAE Flange (ISO 6162)
1620 Old Apex Road
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