Product Overview
A7VO series is a bent-axis axial piston variable displacement pump for open circuit hydrostatic drives. As a high-pressure hydraulic piston pump, the A7VO pump delivers stepless variable flow proportional to drive speed and displacement, widely applied in mobile machinery and stationary industrial hydraulic systems.
We supply A7VO28, A7VO55, A7VO80, A7VO107, A7VO160, A7VO250 with multiple control options: DR pressure control, LR power control, HD hydraulic control, EP electric proportional control, MA, SC control. Rated pressure 350 bar, peak pressure up to 400 bar.
This A7VO hydraulic pump features compact structure, robust bearing group, low noise, high efficiency and long service life. It is a reliable replacement hydraulic pump for concrete mixers, excavators, construction machinery, injection molding machines and heavy industry equipment. We provide original equivalent A7VO hydraulic pumps, fast delivery and technical support.
Technical data
| Item | Symbol | Unit | 55 | 65 | 80 | 100 | 160 |
|---|---|---|---|---|---|---|---|
| Size | NG | 55 | 65 | 80 | 100 | 160 | |
| Displacement, geometric, per revolution | V_g | cm³ | 54.8 | 65 | 80 | 107 | 160 |
| Maximum rotational speed ¹ | At V_0.74×V_rat — n_max | rpm | 2500 | 2200 | 2150 | 1900 | 1900 |
| Maximum rotational speed ² | n_max | rpm | 3400 | 3300 | 3200 | 2900 | 2900 |
| Flow | At V_0.74×V_rat and p_N — q | l/min | 3750 | 3750 | 3350 | 3350 | 3350 |
| Power | At V_0.74×V_rat and p_N — P | kW | 137 | 162 | 179 | 230 | 230 |
| Torque | p_N = 350 bar, at V_0.74×V_rat and p = 350 bar — T | Nm | 80 | 95 | 130 | 134 | 177 |
| Rotary stiffness | V_0.74 to V_rat, V_2/2（interpolated） | Nm/rad | 305 | 362 | 446 | 596 | 891 |
| Moment of inertia rotary group | V_2/2 to 0（interpolated） | kgm² | 0.032 | 0.049 | 0.068 | 0.107 | 0.127 |
| Maximum angular acceleration | α_max | rad/s² | 31600 | 24200 | 21200 | 18200 | 15300 |
| Case volume | V | l | 0.75 | 0.75 | 1.2 | 1.5 | 2.1 |
| Weight（approx.） | m | kg | 25 | 25 | 40 | 49 | 71 |
Applications
Rotary drilling rigs, crane winches, concrete pump trucks, loaders, mining machinery, marine winches, hydrostatic travel drives, construction machinery transmission.
R&D & Manufacturing
Hydraulic Piston Pump - Full In-house Production & Testing
We integrate R&D, precision machining, intelligent assembly and comprehensive hydraulic testing.
Equipped with OKUMA CNC machines and ZEISS precision measuring system, we achieve micron tolerance control. Every hydraulic piston pump is 100% tested for pressure, flow and leakage, delivering dependable hydraulic power components for global customers.
Our partner
Trusted by industry leaders. We cooperate with numerous renowned heavy industry enterprises worldwide.
