| REXROTH A11VLO Series Variable Displacement Axial Piston Pumps |
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| Product Description |
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| The A11VLO series is a high-performance swashplate-type variable displacement pump designed for open-circuit hydraulic systems. It is widely used in mobile and industrial applications, including construction machinery, cranes, and concrete pumps, due to its high efficiency, precise control, and robust design. |
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| Key Features |
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| 1. High Pressure & Efficiency |
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| ◦ Rated pressure: 350 bar (peak 400 bar), with an upgraded 450-bar version (A11VLO/1x-H) for extreme loads. |
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| ◦ Energy savings up to 30% via stepless flow adjustment and load-sensing control, reducing partial-load waste. |
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| 2. Advanced Control Options |
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| ◦ Supports multiple control mechanisms: |
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| ▪ LR (Constant Power): Maintains stable power output under varying loads. |
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| ▪ LRDS (Electronic Proportional Control): Adjusts displacement via 24V signals (200–600mA). |
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| ▪ Pressure Cutoff & Load Sensing: Automatically limits pressure or matches flow to demand. |
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| 3. Integrated Boost Pump |
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| ◦ Unique centrifugal boost pump design (marked "L" in model codes) enhances suction performance, enabling higher speeds (up to 2,600 rpm) and compact installations in space-constrained applications (e.g., offshore piling). |
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| 4. Durable Construction |
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| ◦ High-strength cast iron housing and hardened friction pairs (e.g., pistons, swashplate) for extended lifespan. |
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| ◦ 100% through-drive capability: Allows串联 connection with gear pumps or additional piston pumps. |
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| Technical Specifications |
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| Model |
| A11VLO40 |
| A11VLO145 |
| A11VLO190 |
| A11VLO260 |
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| *Values are theoretical; actual performance depends on system conditions. |
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| Applications |
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| • Construction: Pile drivers, concrete pump trucks, excavators. |
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| • Mobile Hydraulics: Cranes, road pavers, and agricultural machinery. |
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| • Industrial Automation: Presses, plastic injection molding. |
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| Common Models & Configurations |
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| • A11VLO145LRDS/11R-NZD12K83: Constant power + pressure cutoff. |
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| • A11VLO190LRDU2: Electronic proportional control (24V). |
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| • A11VLO260DRS: Basic pressure-compensated control. |
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| Maintenance & Installation Notes |
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| • Critical Requirements: |
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| ◦ Suction pressure must not exceed 2 bar (absolute). |
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| ◦ Pre-fill boost pump casing with fluid before startup. |
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| • Avoid: |
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| ◦ Low oil levels, contaminated fluid, or excessive backpressure (>0.2 bar). |
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| Advantages Over Competitors |
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| • Higher pressure tolerance (vs. standard A11VO series). |
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| • Lower noise and vibration due to optimized swashplate dynamics. |
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| • Modular controls for flexible system integration. |
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| Supplier & Pricing |
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| • OEM Suppliers: HBOETH (China), Partsdic® (replacement parts). |
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| • Pricing: Varies by model (e.g., A11VLO95 starts at ~$1,000; MOQ 1 unit). |
