Rexroth A4VG Series Pump | A4VG71DA, A4VG90EP | 400 Bar Closed Circuit Pump

Rexroth A4VG Series Closed Circuit Axial Piston Variable Pump

Product Overview: The Rexroth A4VG series is a high-performance axial piston variable pump specifically engineered for Closed Circuit hydrostatic transmissions. As a flagship of the proven Series 32 family, it features an integrated charge pump, high-pressure relief valves, and a wide array of precision control options. Whether equipped with DA Automatic Drive Control (speed-sensing) or EP Electric Proportional Control (digital precision), the A4VG series provides superior tractive force and operational smoothness for excavators, road machinery, and heavy-duty mobile equipment.

Key Technical Advantages:

• Sophisticated Control Modulations (DA/EP):

  • Model A4VG71DA1D3L: Features DA Automatic Drive Control, which modulates displacement based on engine RPM to optimize power distribution and prevent engine stalling.

  • Model A4VG90EP2D1: Equipped with EP Electric Proportional Control, allowing for seamless, high-precision displacement adjustment via electric signals, ideal for modern automated and integrated hydraulic systems.

• Heavy-Duty High-Pressure Performance: Designed for extreme load cycles, supporting a rated operating pressure of 400 Bar (40 MPa / 5800 PSI) and peak cycles up to 450 Bar. Reinforced bearings and swashplate supports ensure extended service life under the most grueling conditions.

• Fully Integrated Closed-Loop Solution: Includes a fully integrated charge pump along with boost and high-pressure relief valves. This drastically simplifies circuit plumbing, minimizes potential leak points, and enhances thermal efficiency.

• Robust Thru-Drive Functionality (F001): Features superior thru-drive capability, allowing for the tandem mounting of auxiliary pumps (gear or piston types) to streamline compact, multi-circuit power distribution layouts.

Detailed Models & Parameters:

• Core Series: A4VG (Series 32).

• Detailed Config Codes: A4VG71DA1D3L/32R-NZF02F001S, A4VG90EP2D1/32R-NFS02F001DH-S.

• Displacements: 71 cm³/rev, 90 cm³/rev.

• Pressure Ratings: Rated at 400 Bar (5800 PSI); Peak cycles up to 450 Bar (6500 PSI).

• Control Methods: DA (Automatic Drive Control), EP (Electric Proportional Control).