A11VO145 A11VO130 A11VO190 Rexroth Axial Piston Pump

Genlu Hydraulic proudly introduces our A11VO Series high-performance industrial-grade variable displacement swashplate axial piston pumps engineered for open-circuit hydraulic systems. Purpose-built to endure continuous high-pressure duties within metallurgical equipment, heavy press matrices, mobile infrastructure machinery, and energy-intensive manufacturing lines, this series serves as a precision-manufactured, drop-in replacement for the classic Rexroth A11VO (Series 10 & 11) hydraulic aggregate cores. We specialize in cross-referencing and supplying heavy-duty standard builds, specifically the A11VO145DRS/11R-NSD12K61 and A11VO145DRS configurations, with full displacement scaling spanning A11VO75, A11VO95, A11VO130, A11VO190, and A11VO260.

Acting as the central dynamic pressure supplier in advanced multi-actuator configurations, Genlu’s A11VO line conforms strictly to original geometric boundaries and thermodynamic characteristics. We guarantee 100% Drop-in Interchangeability across standard mounting geometries (SAE 4-bolt pilot standards), input spline shaft parameters (K61: high-torque metric/SAE splined shaft), SAE code pressure/suction flange distances, and the responsive execution profiles of the built-in controller blocks (DRS: Pressure Control integrated with Load-Sensing tracking). Prior to shipment, every product unit is subjected to 100% full-load high-pressure wear-in, transient DRS regulator valve step response loops, and structural volumetric leakage audits, assuring responsive displacement control and long lifecycles under volatile shift dynamics.

Technical Specifications

• Product Line: A11VO Swashplate Axial Piston Variable Displacement Pump for Open Circuits

• Exact Model Designation: A11VO145DRS/11R-NSD12K61 (Series 11 Design Framework)

• Nominal Displacement Configurations:

  • A11VO75 Frame: 75.0 $cc/rev$

  • A11VO95 Frame: 95.0 $cc/rev$

  • A11VO130 Frame: 130.0 $cc/rev$

  • A11VO145 Frame: 145.0 $cc/rev$

  • A11VO190 Frame: 190.0 $cc/rev$

  • A11VO260 Frame: 260.0 $cc/rev$

• Maximum Continuous Rated Pressure: 35.0 MPa (350 bar)

• Maximum Intermittent Peak Pressure Boundary: 40.0 MPa (400 bar)

• Maximum Self-Suction Rotational Velocity:

  • A11VO145 Model: 2200 rpm

  • A11VO190 Model: 2100 rpm

• Control Valve Classification: DRS Regulator (DR: Constant Pressure/Limitation override; S: Differential Load-Sensing logic for flow management relative to implement demand)

• Direction of Shaft Rotation: R Suffix (Clockwise rotation, viewed from the shaft face)

• Sealing Configuration Material: N Designation (Premium NBR compound backed by high-thermal Viton rotary shaft sealing elements)

• Drive Shaft Specification: K61 Pattern (SAE Heavy-Duty Involute Spline Layout)

• Net Bare Unit Weight (A11VO145 Empty): Approx. 82.0 kg

Key Technical Advantages:

• Precision DRS Load-Sensing for Maximum System Throttling Efficiency: Fitted with a dual-stage DRS control block that continuously reads downstream active pressure differentials. The pump automatically scales the swashplate orientation angle to supply the precise flow demanded by the actuators. This targets zero-flow standby losses and cuts non-productive throttling thermal dissipation by up to 65%.

• Dual-Solenoid Stroking Pistons for Accelerated Stroke Response: The displacement adjustment layout relies on a dual-piston opposing servo repositioning matrix. Fluid-dynamically optimized control orifices enable full-to-minimal stroke volume transition response times under 40 milliseconds, providing smooth multi-axis coordination on massive casting and forming setups.

• Bimetallic Valve Plate Facing for Robust 95% Volumetric Retention: The core cylinder group matches micro-alloyed nodular cast iron barrel block sleeves with a precision-sintered bimetallic bronze layer fluid-distributor plate. At 35 MPa, this interface maintains micro-clearance sealing properties, securing a continuous volumetric efficiency above 95% while keeping internal bypass oil heating minimal.

• Through-Drive Structural Output for Modular Pump Stacking: The series incorporates a rigid cradle swashplate architecture with full integrated through-drive capability. Users can mount a secondary A11VO pump, a auxiliary charge gear pump, or vane configurations directly to the rear power take-off (PTO). This simplifies multi-stream circuit architectures using a single prime mover.

Application Areas:

• Heavy Metallurgical & Forging Machinery: High-output power units for scrap metal briquetting presses, alligator metal shears, steel mill rolling lines, and open-die structural forge matrices.

• Heavy Construction & Infrastructure Vehicles: Primary fluid generator loops for concrete boom pumps, rotary piling rigs, and heavy-lift hydraulic crawler crane winches.

• Marine Engineering & Deck Machinery: Prime hydraulic drives for heavy-cargo anchor winches, proportional steering gear cylinders, and offshore platform jack-up leveling configurations.

Expert Maintenance Tips:

• Mandatory Pre-Commissioning Casing Prime and Air Bleeding: The sliding slipper pads on the A11VO rotating group depend on initial hydro-dynamic fluid film separation to survive startup acceleration. Before initial power engagement, pre-fill the pump casing completely through the highest available case drain port (U or T). Spin the shaft manually a few revolutions to clear trapped air bubbles and avoid dry friction damage to the swashplate cradle.

• Isolate Case Drain Headers and Monitor Cavity Backpressures: The pilot discharge oil from the DRS regulator flows directly into the internal pump cavity. Consequently, the case drain link must be routed back to the reservoir via an independent, un-throttled line (never tie this to general system return T-lines). Ensure continuous internal casing pressure does not exceed 0.2 MPa (2 bar) to protect the shaft seal lip from structural rupture and prevent servo instability.

• Maintain Clean Fluid Filtration Metrics (NAS Class 7 / ISO 16/13): The pilot control orifices in the DRS variable adjustment assembly feature exceptionally small cross-sections. Implement highly fine filtration layouts to preserve an oil cleanliness boundary of NAS Class 7 or ISO 4406 16/13. Silt or micro-particulate contamination will stick the control spools, causing the pump to hang at a fixed displacement or drop pressure completely.