Rexroth A10VO74 Series Pump | A10VO74 DFLR/31L, A10VO74/31R | 280 Bar Constant Power Piston Pump

Rexroth A10VO74 Series (Series 31) Constant Power Variable Piston Pump

Product Overview: The Rexroth A10VO74 is a high-performance variable displacement piston pump engineered for open-circuit hydraulic systems. As a key displacement within the classic Series 31, the 74.0 cm³/rev specification offers the perfect balance between power density and installation footprint. The heart of this pump is the DFLR control mechanism, which integrates pressure, flow, and constant power regulation. This allows the pump to automatically adjust displacement based on system pressure, ensuring that the absorbed power remains within preset limits and effectively preventing drive motor or diesel engine stalls. Models like the A10VO74 DFLR/31L-VSC41N00, with their rugged swashplate design, are widely utilized in rotary drilling rigs, construction machinery, and heavy-duty industrial HPUs.

Key Technical Advantages:

• Intelligent DFLR Control: Combines pressure cut-off, load sensing (flow control), and power limiting. It optimizes power source utilization by restricting maximum torque output while maintaining rapid system response.

• Heavy-Duty Reliability: Rated for a continuous operating pressure of 280 Bar (28 MPa) with peak cycles reaching 350 Bar. Reinforced rotating groups and slipper designs ensure stability under continuous high-pressure cycles.

• Superior Suction & High-Speed Performance: Optimized valve plate technology suppresses operating noise and enhances self-priming speed limits, reducing the requirement for charge pressure.

• Sealing & Mounting Flexibility (VSC):

  • Equipped with high-grade FKM (Viton) seals for exceptional resistance to high temperatures and specialized hydraulic fluids.

  • The VSC41N00 configuration provides standardized shaft ends and mounting flanges for seamless integration with existing machinery.

• Through-Drive Capability: Features robust through-drive torque capacity, enabling tandem mounting of a secondary pump (such as an A10VSO or gear pump) for multi-circuit power integration.

Detailed Models & Parameters:

• Core Series: Rexroth A10VO Series 31.

• Representative Models: ALA10VO74 DFLR/31L-VSC41N00, A10VO74 DFLR/31R-VSC41N00P.

• Displacement: 74.0 cm³/rev.

• Pressure Ratings: Rated at 280 Bar (4060 PSI); Peak cycles up to 350 Bar (5100 PSI).

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

• Control Type: DFLR (Pressure, Flow and Power Control).