I. Product Overview
TheA4VSO125MAis a swashplate-type axial piston variable-displacement pump from theRexroth A4VSO series, designed specifically for open-circuit hydraulic systems. Its key features include:
1. Variable Displacement:
• Enables stepless adjustment of displacement via swashplate angle modulation, ensuring proportional flow to drive speed and displacement for diverse operating conditions.
2. High-Pressure Performance:
• Rated pressure typically350 bar(peak pressure up to450 barfor some models), suitable for high-load hydraulic applications.
3. Compact Design:
• Modular construction simplifies installation and maintenance, supporting multiple control modes (e.g., constant pressure, pressure/flow control).
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II. Technical Specifications
Example model: A4VSO125DR/30R-PPB13N00 (parameters may vary slightly for MA variants, but core performance remains consistent):
1. Displacement:
• 125 cm³/rev(125 mL per revolution).
2. Speed Range:
• Maximum speed: 1,800 rpm (some models up to 2,200 rpm).
• Recommended nominal speed: 1,500 rpm (balances flow and efficiency).
3. Flow Range:
• Maximum flow: ~225 L/min at 1,800 rpm; ~187.5 L/min at 1,500 rpm.
4. Power & Torque:
• Maximum power: ~131 kW at 1,800 rpm; ~109 kW at 1,500 rpm.
• Maximum torque (ΔP = 350 bar): ~696 Nm.
5. Control Modes:
• DR: Constant pressure control for stable system pressure.
• DFR: Pressure/flow compound control for dynamic load adaptation.
• Other options:DRG(remote constant pressure),DP(power control), etc.
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III. Performance Advantages
1. Energy Efficiency:
• Variable displacement adjusts flow to match load demands, reducing energy waste.
• High volumetric efficiency minimizes internal leakage and power loss.
2. Durability:
• Axial piston design reduces friction and wear, extending service life.
• Robust alloy materials and corrosion-resistant coatings withstand harsh environments.
3. Rapid Response:
• Integrated swashplate mechanism enables quick displacement adjustments for sensitive load sensing.
4. Easy Maintenance:
• Modular design simplifies part replacement and repairs, minimizing downtime.
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IV. Applications
TheA4VSO125MAis widely used in hydraulic systems requiring high pressure, large flow rates, and precise control, including:
1. Industrial Equipment:
• Hydraulic presses, injection molding machines, automated assembly lines.
2. Construction Machinery:
• Excavators, cranes, road rollers.
3. Agricultural Machinery:
• Tractors, harvesters.
4. Mining & Material Handling:
• Hoists, conveyors.
5. Marine & Offshore Engineering:
• Deck machinery, steering gear systems.
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V. Selection & Customization
1. Control Mode Selection:
• ChooseDR(constant pressure),DFR(pressure/flow control), etc., based on system requirements.
2. Mounting Interfaces:
• Supports flange, SAE thread, or SAE imperial connections for compatibility with diverse systems.
3. Material Upgrades:
• Optional corrosion-resistant materials or coatings for marine/chemical environments.
4. Custom Displacement:
• Some manufacturers offer non-standard displacement customization for unique flow demands.
