Bosch Rexroth | AA10VSO28DFLR31R-VKC62K68AA10VSO28DFLR31R-VSC62N00
AA10VSO28DFLR/31R-VKC62K68+AA10VSO28DFLR/31R-VSC62N00
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The AA10VSO28DFLR/31R-VKC62K68+AA10VSO28DFLR/31R-VSC62N00 variable pump assembly belongs to the A10VSO Variable Pumps series from Bosch Rexroth. Intended for closed-loop hydraulic automation, each AA10VSO28 unit incorporates DFLR pressure, flow, and power control to match circuit demand. A displacement of 28 cm³ per revolution (1.71 in³) balances output with efficiency, while a nominal speed of 3000 rpm supports compact electric motor drives. At that speed the pump can deliver up to 84 L/min (22 gpm), supplying the flow required by medium-size cylinders and motors. Clockwise shaft rotation fits standard right-hand prime movers, and porting version 62 positions all service ports on the side for straightforward pipe routing. The pressure outlet uses a 3/4 in ISO 6162-1 Port B connection, whereas the inlet is a 1 1/4 in ISO 6162-1 suction port to minimize inlet losses.
Each pump tolerates a maximum working pressure of 350 bar (5100 psi) and carries a continuous rating of 280 bar (4100 psi). A case pressure limit of 2 bar (30 psi) protects shaft seals, and a minimum suction pressure of 0.8 bar absolute (12 psi absolute) prevents cavitation at high speeds. FKM sealing material resists elevated oil temperature and common hydraulic fluids. A 3/4-16 UNF-2B drain port returns leakage oil to tank, while the 7/16-20 UNF-2B pilot pressure port accepts remote control signals for the DFLR regulator. Side-mounted ports are complemented by a weight of 18 kg (40 lb) per pump, keeping the assembly manageable during installation or service.
Technical Specifications
Case Pressure Max (l/l1, Per Pump)
2 bar (30 psi)
Control Type
DFLR (Pressure/Flow/Power)
Displacement (per Pump)
28 cm3/rev (1.71 in3)
Drain Port Thread (per Pump)
3/4-16 UNF-2B
Max Flow At 3000 Rpm (per Pump)
84 l/min (22 gpm)
Maximum Pressure (per Pump)
350 bar (5100 psi)
Min Suction Pressure At S
0.8 bar abs (12 psi abs)
Nominal Pressure (per Pump)
280 bar (4100 psi)
Nominal Speed (vg Max, Per Pump)
3000 rpm
Pilot Pressure Port (per Pump)
7/16-20 UNF-2B
Port B Size (per Pump)
3/4 in (ISO 6162-1)
Porting Version
62 (Ports On Side)
Rotation Direction
Clockwise
Sealing Material
FKM (V)
Suction Port S Size (per Pump)
1 1/4 in (ISO 6162-1)
Weight Without Through Drive (per Pump)
18 kg (40 lb)
1620 Old Apex Road
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