Rexroth A7V Series Axial Piston Pump | A7V250 A7V160 A7V117 | A7V250LV5.1LPF00

LIC Hydraulic offers the Rexroth A7V Series, the global benchmark for high-pressure bent-axis axial piston variable displacement pumps. Designed specifically for open-circuit systems, the A7V series (including A7V55, A7V117, A7V160, and A7V250) is renowned for its high power density and superior suction characteristics. The model A7V250LV5.1LPF00 features an advanced Constant Power Control (LV), allowing the pump to automatically adjust its displacement based on load requirements to prevent engine stall and optimize energy usage.

Technical Specifications (Bulleted List)

• Series: Rexroth A7V (Bent Axis Variable Pump)

• Displacements: $55, 78, 107, 160, 250, 355, 500, 1000\text{ cc/rev}$

• Control Types: LV (Power), DR (Pressure), MA (Manual), HD (Hydraulic).

• Max Pressure: Continuous $350\text{ bar}$ ($5000\text{ PSI}$), Peak up to $400\text{ bar}$.

• Rotational Speed: Superior self-priming speeds compared to swash-plate designs.

Key Technical Advantages

• Bent-Axis Reliability: The unique geometry allows for a more robust drive shaft and bearing assembly, providing legendary service life in high-vibration and high-duty cycle applications.

• Superior Volumetric Efficiency: Precision-fitted spherical pistons ensure a near-perfect seal, maintaining high output even at maximum pressures and temperatures.

• Flexible Control Options: Modular control blocks can be easily swapped or adjusted to provide pressure compensation, load sensing, or constant power management.

• Thermal Resilience: Designed to operate efficiently across a wide temperature range, making it the preferred choice for steel mill and mining environments.

Application Areas

• Heavy Manufacturing: Power units for large presses, forging hammers, and molding machines.

• Mining & Excavation: Main pump for tunnel boring machines (TBM) and heavy-duty winches.

• Maritime: Hydraulic power for steering systems, deck machinery, and cranes.

Expert Maintenance Tips

• Case Drain Installation: Always route the case drain line directly to the tank with minimal backpressure. High case pressure can lead to shaft seal failure and internal component damage.

• Fluid Cleanliness: To maintain the precision of the bent-axis piston assembly, ensure oil cleanliness is kept at $ISO\text{ 18/16/13}$ or better.

• Mounting Orientation: When installing vertically (shaft up), ensure the case is fully bled of air. Any air pocket at the top will lead to catastrophic lubrication failure of the upper bearings.