Rexroth A4VG40 Series Pump | A4VG40EZ1, A4VG40DA1 | 400 Bar Closed Circuit Piston Pump

Rexroth A4VG40 Series (Series 32) Closed Circuit Variable Piston Pump

Product Overview: The Rexroth A4VG40 is the heart of hydrostatic transmission systems for mobile machinery. Part of the proven Series 32, it offers a prime displacement of 40 cm³/rev. Specifically designed for closed-circuit applications where rapid reversal and high efficiency are paramount, the A4VG40 operates at a rated pressure of 400 Bar. Flagship models such as the A4VG40EZ1 (Electric Proportional Control) and A4VG40DA1 (Speed-Related Control) integrate charge pumps and high-pressure relief valves to provide precise, robust power for rollers, pavers, and mid-sized construction equipment.

Key Technical Advantages:

• Superior Power Density: Delivers a rated pressure of 400 Bar (40 MPa) with peak capabilities up to 450 Bar within a compact footprint, ensuring massive torque for heavy-duty incline starts.

• Precision Control Modalities (EZ / DA):

  • EZ1 Electric Control: Features proportional solenoid modulation for seamless integration with electronic controllers, enabling stepless speed adjustment.

  • DA1 Speed-Related Control: Automatically adjusts flow based on engine RPM, providing an intuitive “driving feel” essential for mobile machinery.

• Highly Integrated Design (PSC/NAC): Internally houses the charge pump, high-pressure relief valves, and cut-off valves. Configurations like PSC02/NAC02 minimize external plumbing and reduce potential leakage points.

• Through-Drive Capability (F013/F015): Supports tandem mounting of secondary pumps (piston or gear) to power auxiliary functions like steering or braking systems.

• Exceptional Efficiency: The optimized valve plate design suppresses fluid pulsations and operating noise while maintaining peak volumetric efficiency across the entire speed range.

Detailed Models & Parameters:

• Core Series: Rexroth A4VG Series 32.

• Representative Models: A4VG40EZ1DM1/32L-PSC02F013S-S, A4VG40DA1D8/32R-NAC02F015SH-S.

• Displacement: 40 cm³/rev.

• Pressure Ratings: Rated at 400 Bar (5800 PSI); Peak cycles up to 450 Bar (6525 PSI).

• Rotation: L (Counter-clockwise); R (Clockwise).

• Suffix Code: S (Indicates specific customization or reinforced axial load bearing).