A11VLO260DRS/11R-NZD12N00 Hydraulic Pump: Core High-Pressure Large-Displacement Power Unit for Open-Circuit Systems Enabling Efficient Operation of Heavy-Duty Equipment
Against the backdrop of surging demand for high pressure, large flow rate, long service life and superior controllability in construction machinery, mining machinery and heavy hydraulic equipment, the Rexroth A11VLO series variable axial piston pump has emerged as the mainstream power core thanks to its mature open-circuit architecture and modular configuration. As the flagship large-displacement model within this series, the A11VLO260DRS/11R-NZD12N00 delivers all-in-one power solutions for hydraulic systems of heavy machinery via precise displacement control, robust pressure resistance and outstanding adaptability to diverse working conditions.
I. Product Positioning & Core Technical Parameters
The A11VLO260DRS/11R-NZD12N00 is a swash-plate variable axial piston pump engineered exclusively for open-circuit hydraulic transmissions. It serves as the main hydraulic pump for high-displacement, high-pressure mobile machinery and stationary industrial equipment. Its key specifications are listed below:
Nominal displacement: 260 cm³/rev
Rated pressure: 350 bar; peak pressure: 400 bar
Maximum rotational speed: 2800 rpm
Control mode: DRS (combined pressure, flow and power control)
Mounting & port configuration: 11R clockwise rotation, through-drive design, SAE standard mounting flange
Compatible fluids: Mineral oil, HFD fire-resistant hydraulic oil
Operating temperature range: -20°C ~ 80°C
Structural features: Integrated charge pump, supporting three operation modes: self-priming, tank pressurization and external booster pump supply
The complete model code accurately defines the pump's displacement, control logic, rotation direction, mounting ports and sealing configuration, forming a standardized selection reference for OEM matching and aftermarket replacement.
II. Core Technical Advantages Delivering Uncompromising Reliability
1. High-Efficiency Displacement Control for Energy Savings
Adopting stepless swash-plate displacement adjustment, the pump's output flow varies proportionally with rotational speed and displacement. The DRS composite control dynamically regulates pressure and flow in response to load demands to eliminate overflow losses. It cuts energy consumption by 15%–30% compared with conventional fixed-displacement pumps, significantly boosting fuel or power efficiency of host equipment.
2. Heavy-Duty High-Pressure Construction for Severe Working Environments
The pump housing and critical friction pairs are manufactured from high-strength cast iron with precision grinding processes. Reinforced treatment is applied to pistons, cylinder blocks and valve plates, enabling continuous stable operation under the 350 bar rated pressure without performance degradation. Its 400 bar peak pressure capacity withstands shock loads, making it suitable for long-term operation in harsh scenarios such as mining, underground tunneling and field worksites.
3. Through-Drive Modular Design with Exceptional Expandability
Featuring full through-shaft drive capability, the pump allows direct series connection with gear pumps or identical axial piston pumps to realize multi-pump confluence and multi-circuit oil supply. It caters to complex hydraulic system integration for concrete pump trucks, rotary drilling rigs, mining dump trucks and more, reducing installation footprint and pipeline complexity.
4. Low Noise & Low Flow Pulsation for Smooth Operation
Optimized flow channel layout and piston arrangement limit flow pulsation rate to ≤3%, with operational noise lower than 72dB(A). This minimizes hydraulic system vibration and pipeline impact, extending the service life of auxiliary components including hydraulic cylinders and valve manifolds while improving equipment handling comfort.
5. Simplified Maintenance & Low Total Lifecycle Cost
Standardized ports and modular components allow disassembly, inspection and repair without special tooling. Excellent self-priming performance delivers greater tolerance to hydraulic fluid contamination. Paired with an efficient filtration system, the pump drastically extends maintenance intervals and cuts overall operational costs for end users.
III. Main Application Scenarios Covering Full Spectrum of Heavy-Duty Equipment
Boasting large displacement, high pressure and precise controllability, the A11VLO260DRS/11R-NZD12N00 is widely deployed across the following sectors:
Construction machinery: 7–50 ton excavators, mobile truck cranes, concrete pump trucks, crawler loaders, road rollers
Mining machinery: Mining dump trucks, hydraulic drill rigs, roadheaders, shield tunneling machines, crushers
Industrial hydraulics: Ten-thousand-ton hydraulic presses, injection molding machines, metallurgical rolling mills, material handling equipment
Specialized machinery: Marine lifting cranes, oilfield drilling rigs, heavy-duty flatbed transporters, agricultural silage harvesters
Under continuous heavy loads and frequent load fluctuations, the pump maintains consistent flow and accurate pressure output, acting as a critical component to enhance operational efficiency and equipment reliability.
IV. Value in Product Selection & Replacement
As a standard 260-displacement variant of the A11VLO series, the A11VLO260DRS/11R-NZD12N00 features OEM direct supply, standardized parameters and superior interchangeability. It can be deployed as the factory-fitted power unit for new equipment development, or as a drop-in replacement for worn pumps on legacy machinery to upgrade performance without modifying the existing hydraulic circuit.
For equipment manufacturers, the pump balances premium performance and cost-effectiveness to strengthen product market competitiveness. For end operators, its robust and stable construction reduces unplanned downtime and ensures uninterrupted production.
Conclusion
The A11VLO260DRS/11R-NZD12N00 hydraulic pump stands out with core strengths of large displacement, high pressure, precise controllability and outstanding reliability, perfectly meeting the upgrading demands of heavy-duty hydraulic systems. Leveraging Rexroth's proven axial piston pump technology and modular design philosophy, this model has become a benchmark solution for high-pressure open-circuit hydraulic systems, delivering robust power support for efficient, stable and energy-saving operation in construction, mining, industrial hydraulic and other heavy industries.