Shaoyang Victor Hydraulic Co., Ltd.
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450 Bar Max Pressure Rexroth Axial Piston Pump for Mining Equipment Hydraulics
Features:
1. Hydrostatic transmission overload protection.
2. Relief valves with boost valve functionality.
3. Electro-proportional displacement control option.
4. Mechanical servo control variant.
5. Load-sensing pressure compensation system.
6. High-efficiency piston pair design (>92%).
7. Wear-resistant axial port plate technology.
8. Reinforced swashplate bearing configuration.
9. Optimized case drain pressure relief path.
10. Wide displacement range (28-250cc).
Technical data:
| Size | NG | 56 | 71 | 90 | 125 | 180 | ||
| Geometric displacement, per revolution | variable pump | Vg max | cm3 | 56 | 71 | 90 | 125 | 180 |
| boost pump (at Δp = 20 bar) | Vg Sp | cm3 | 11.6 | 19.6 | 19.6 | 28.3 | 39.8 | |
| Rotational speed | maximum at Vg max | nnom | rpm | 3600 | 3300 | 3050 | 2850 | 2500 |
| limited maximum | nmax1 | rpm | 3900 | 3600 | 3300 | 3250 | 2900 | |
| intermittent maximum | nmax2 | rpm | 4500 | 4100 | 3800 | 3450 | 3000 | |
| minimum | nmin | rpm | 500 | 500 | 500 | 500 | 500 | |
| Flow | at nnom and Vg max | qv | l/min | 202 | 234 | 275 | 356 | 450 |
| Power at nnom, Vg max | Δp = 400 bar | P | kW | 134 | 156 | 183 | 238 | 300 |
| Torque with Vg max | Δp = 400 bar | M | Nm | 357 | 452 | 573 | 796 | 1146 |
| Δp = 100 bar | M | Nm | 89 | 113 | 143 | 199 | 286 | |
| Rotary stiffness of drive shaft | S | c | kNm/rad | 80.8 | 98.8 | 158.1 | 218.3 | 244.5 |
| T | c | kNm/rad | 95 | 120.9 | – | 252.1 | 318.4 | |
| A | c | kNm/rad | 95.8 | 142.4 | 176.8 | 256.5 | – | |
| Z | c | kNm/rad | 78.8 | 122.8 | 137 | 223.7 | 319.6 | |
| U | c | kNm/rad | – | – | 107.6 | – | – | |
| Moment of inertia of the rotary group | JTW | kgm2 | 0.0066 | 0.0097 | 0.0149 | 0.0232 | 0.0444 | |
| Maximum angular acceleration | α | rad/s² | 24000 | 21000 | 18000 | 14000 | 11000 | |
| Case volume | V | l | 1.5 | 1.3 | 1.5 | 2.1 | 3.1 | |
| Weight (without through drive) approx. | m | kg | 38 | 50 | 60 | 80 | 101 | |
Specifications:
| Warranty | 1 Year |
| Model | SY-A4VG |
| Place of Origin | China |
| Type | Costruction machinery piston pump |
| Color | Available any color |
| HS Code | 8413503190 |
| Application | excavator, road rollers, pavers |
| Feature | High Quality |
| Delivery Time | 15-30 Days after Payment |
| MOQ | 1 Piece |
Applications:
Competitive Advantage:
1. Built for extreme reliability and high performance, the A4VG series excels in delivering precise, variable hydraulic power through advanced control systems, integrated safety measures, and optimized fluid dynamics, making it a highly efficient piston pump that reduces downtime, maintenance costs, and energy consumption across industrial and mobile applications every day.
2. The closed-loop design and bi-directional displacement control of A4VG enable efficient energy conversion and smooth stepless speed regulation for construction machinery, adapting to dynamic loads on rugged terrains.
3. Integrated boost pump and high-pressure relief valves ensure reliability and longevity under frequent start-stop cycles and shock loads.
4. Infinitely adjustable swashplate angle optimizes flow for pumping operations, while 450bar peak pressure enhances concrete delivery efficiency.
5. Standard pressure cut-off and intelligent power limitation prevent overload risks during continuous high-pressure operations.
The Analysis For Rexroth A4VG Closed Circuit Piston Pump Common Breakdown :
1. In this hydraulic pump, operating under low fluid conditions can induce cavitation, where vapor bubbles form and collapse violently, causing physical damage to internal surfaces, reduced efficiency, and noise, thereby requiring prompt fluid level maintenance, proper system priming, and continuous monitoring to prevent cavitation-induced deterioration for long-term reliability and efficiency.
2. In this piston pump, the entrainment of air within the hydraulic fluid can lead to inconsistent fluid dynamics, erratic pressure fluctuations, and reduced system responsiveness, ultimately compromising performance and causing potential damage, which necessitates effective deaeration procedures, regular fluid replacement, and system inspections to eliminate air bubbles and restore stability.
3. In this axial piston pump system, blockage or contamination within the integrated boost pump can hinder proper feed pressure generation, leading to insufficient control pressure, erratic system behavior, and reduced overall performance, which necessitates immediate cleaning, fluid replacement, and thorough inspection of the boost pump assembly to restore functionality promptly.