Rexroth Axial Piston Variable Pump A7VO

Rexroth A7VO axial piston variable pump

Description:

The Rexroth A7VO is a high‑performance axial‑piston variable displacement pump, built with a bent‑axis design and optimized for hydrostatic drives in open‑circuit hydraulic systems. Its displacement is adjustable by varying the bent‑axis angle, allowing stepless control of flow proportional to drive speed and displacement. With proven rotary‑group technology and a wide selection of control devices, the A7VO pump delivers robust reliability, high efficiency, and long service life — making it ideal for both mobile and stationary industrial hydraulic applications.

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Rexroth Axial Piston Variable Pump A7VO

  • Variable displacement & stepless flow control: Flow output scales with drive speed and displacement — enables precise flow regulation and system flexibility.

  • High pressure and power capacity: Up to 350 bar nominal (400 bar peak), and high flow/power output — suitable for demanding, heavy‑duty hydraulic systems.

  • Robust, durable design: Bent‑axis rotary group technology, proven reliability, optional long‑life bearings for heavy use, long service intervals.

  • Wide control and configuration options: Multiple control devices (hydraulic, pressure, proportional, electric) to match diverse application needs.

  • High total efficiency & performance: Efficient conversion of mechanical input into hydraulic flow and power; suitable for both mobile and industrial hydraulic systems.

  • Versatile application range: From compact machinery to large industrial systems — ideal for construction, mining, marine, metalworking, and other sectors requiring strong hydraulic performance.

Parameter Specification / Details
Pump Type Axial‑piston, variable displacement, bent‑axis design
Series / Model A7VO (various sizes: 28, 55, 80, 107, 160, 250, 355, 500)
Displacement (geometric) Vg_max 28.1 – 500 cm³/rev depending on size
Nominal Pressure (p_nom) 350 bar
Maximum Pressure (p_max) 400 bar
Maximum Speed (at Vg_max) Varies by size: e.g. 3150 rpm (size 28), 2500 rpm (size 55), 2240 rpm (size 80), etc.
Maximum Flow (at Vg_max & n_nom) Example: size 55 → ~137 L/min; size 250 → ~375 L/min; size 500 → ~600 L/min
Power Output (at Δp = 350 bar, nominal flow) Varies: e.g. size 80 → ~105 kW; size 355 → ~273 kW; size 500 → ~350 kW
Torque (at Vg_max & nominal pressure) Example: size 55 → 305 Nm; size 250 → 1391 Nm; size 500 → 2785 Nm
Fluid Compatibility Hydraulic mineral oils, synthetic oils, biodegradable oils
Operating Conditions Open circuit hydrostatic drives; suitable for mobile and stationary applications
Control Options Wide selection: hydraulic control (power controller without override), pressure controller, proportional hydraulic or electric control, etc.
Special Features Bent‑axis design, variable displacement, robust rotary group, high total efficiency, long service life, optional high‑speed version for certain sizes, long‑life bearings for larger sizes.
Applications Construction machinery, mobile equipment, engineering vehicles, industrial machinery, heavy‑duty presses, metal forming, mining, marine hydraulics, etc.