Hydraulic Pump
Hydraulic Pump
A20VLO hydraulic pump
be269bdb-09ca-4c73-9685-3d03e1849aa8
18a9a5ef-9b81-4d35-bfdc-071666bd112f
2ebbd78a-2584-4402-8663-dc1973f8362c
fa0cfe9c-3a10-4d5e-9a10-45209354bb77
8a4717fc-853b-4d2a-ae1c-559a06834c02

A20V(L)O Variable Double Pump

Features:

▶ Variable double pump with two axial piston rotary
groups with swashplate design for hydrostatic drives
in an open circuit.
▶ Flow is proportional to the drive speed and displacement.
▶ The flow can be continuously changed with closed
loop control.
▶ For use in mobile and industrial application areas.
▶ The pump consists of proven components of the A11VO
(RE 92500), A10VO/53 (RE 92703), or A4VSO
(RE 92050) variable displacement pumps.
▶ An extensive range of control devices is available in
the respective data sheets for different control and
regulating functions.
▶ Pump operation can be self-priming, with a priming
reservoir, or with a charge pump (NG 190 and 260).
▶ Power setting is possible from the outside, even while
the machine is running (only with power controller).
▶ The through drive is suitable for mounting gear pumps
and axial piston pumps.                                                                                 ▶ Compact back-to-back pump for machines with
multi-circuit system
▶ Size 60
- Nominal pressure 250 bar
- Maximum pressure 315 bar
▶ Sizes 95 to 520
- Nominal pressure 350 bar
- Maximum pressure 400 bar
▶ Open circuit

Size     NG   60 95 190 260 520
Displacement, geometric, per revolution Vg max cm3   60 93.8 192.7 260 520
(by rotary group) Vg min cm3   0 0 0 0 0
at Vg max2)                                          
at Vg ≤ Vg max		 nnom rpm   2700 2350     25003)     23003) 1450
nmax rpm   31404) 27804) 2500 2300 17204)
Flow                       At nnom and Vg max qv l/min   2 x 162 2 x 220 2 x 482 2 x 598 2 x 754
Power                     at nnom, Vg max
                           and Δp = 250 bar                  
                           at nnom, Vg max
                           and Δp = 350 bar		 P kW   135 – – – –
P kW   – 257 562 698 880
Torque                    at Vg max
                           and Δp = 250 bar2)
                           at Vg max
                           and Δp = 350 bar2)		 Mmax Nm   477 – – – –
Mmax Nm   – 1045 2147 2897 5793
Rotary stiffness
of drive shaft
                           T		           c kNm/rad   – 199.6 346.2 686.5 1136
c kNm/rad   65.5 173.7 – – –
c kNm/rad   – – 301.9 567.1 –
Moment of inertia JTW kgm2   0.0113 0.0346 0.1127 0.1773 0.696
Maximum angular acceleration5) α rad/s²   3300 13000 6800 4800 2800
Case volume approx. V l   1.6 4.2 7.6 9.2 28
Weight (without through drive) approx.6) m kg   44 107 213 275 640
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