Rexroth A11VO130 & A11VO260 Pump | LRDU2, LRDS | High Pressure Variable Piston Pump

Rexroth A11VO Series High-Pressure Axial Piston Variable Pump

Product Overview: The Rexroth A11VO series is a premier high-pressure variable displacement piston pump engineered for extreme heavy-duty open-circuit applications. As the primary power source for global large-scale excavators, rotary drilling rigs, and concrete pump trucks, this series is renowned for its robust swashplate design and superior power density. Flagship models such as the A11VO130LRDU2/10R-NPD12N00H-S (with Cross-Sensing Control) and A11VO260LRDS/11R-NPD12K24 (with Load Sensing & Power Limitation) deliver continuous operating pressures up to 350 Bar, ensuring precise flow distribution and maximum energy efficiency.

Key Technical Advantages:

• Advanced LRDU2/LRDS Control Mechanisms:

  • LRDU2 (Cross-Sensing Power Control): Manages the combined power of twin-pump systems, ensuring 100% engine power utilization without stalling.

  • LRDS (Load Sensing & Pressure Cut-off): Modulates flow in real-time based on actuator demand and automatically de-strokes at preset pressures to drastically improve fuel economy.

• Extreme Pressure & Extended Service Life: Rated for 350 Bar (5000 PSI) continuous duty with peak support up to 400 Bar. Reinforced bearings and patented swashplate technology support 24/7 high-intensity heavy-load cycles.

• Superior Suction Performance: The unique swashplate geometry optimizes self-priming capabilities, effectively preventing cavitation even at high rotational speeds.

• 100% Torque Through-Drive: Supports full nominal torque for secondary pump mounting, facilitating the integration of charge pumps or tandem main pumps.

• 100% OEM Standard Compatibility: Manufactured to strict Rexroth Series 10/11 standards (e.g., NPD12N00H specifications), ensuring splined shafts and mounting flanges align perfectly for a seamless “drop-in” replacement.

Detailed Models & Parameters:

• Core Series: Rexroth A11VO Series 10 / Series 11.

• Representative Models: A11VO130LRDU2/10R-NPD12N00H-S, A11VO260LRDS/11R-NPD12K24.

• Displacements: 130 cm³/rev, 260 cm³/rev.

• Control Types: LRDU2 (Power control + Cross sensing), LRDS (Load sensing + Power control + Pressure cut-off).

• Pressure Ratings: Rated at 350 Bar (5000 PSI); Peak surges up to 400 Bar.

• Rotation: R (Clockwise/CW).

• Target Applications: 20-50 ton excavators, rotary drilling rigs, concrete pump trucks, crawler crane hydraulics, and heavy-duty scrap shears.