Shaoyang Victor Hydraulic Co., Ltd.
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A4VG71 Variable Axial Piston Pump 3300 RPM Cast Iron for Agriculture Machinery
Features:
1. High volumetric efficiency design helps reduce energy consumption.
2. Compact construction saves installation space and facilitates system integration.
3. Superior mechanical sealing technology ensures leak-free operation.
4. High dynamic response performance accommodates rapid and transient load changes.
5. Constructed with high-strength materials to enhance durability and service life.
6. Infinitely variable flow via swashplate angle adjustment.
7. Smooth flow direction reversal via neutral swashplate position.
8. Multiple adaptable control device configurations.
9. Dual high-pressure relief valves for overload protection.
10. High-pressure relief valves with integrated boost function.
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. Featuring a built-in pressure cut-off and low-pressure relief valve, the A4VG series offers advanced overpressure protection and energy management, reducing the risk of system overload and damage while maintaining smooth hydraulic control, making it an ideal hydraulic pump for both high-performance industrial applications and mobile machinery requiring reliable safety measures.
2. Offering superior adaptability in various operating conditions, the A4VG series combines high dynamic response with variable flow control, advanced safety features, and integrated boost pump technology, making it a highly efficient piston pump that delivers consistent energy output, reduced maintenance costs, and exceptional durability in demanding industrial and mobile applications.
3. Engineered with a focus on energy conservation and reduced operational costs, the A4VG series employs advanced variable displacement technology, integrated boost features, and dual pressure relief valves to deliver consistent, efficient performance as a high-quality axial piston pump, making it an outstanding choice for eco-friendly industrial and mobile applications today.
4. Offering precise control over flow and pressure, the A4VG series utilizes cutting-edge variable displacement mechanisms and integrated safety features to ensure rapid responsiveness and optimal energy usage, positioning it as a top-tier piston pump ideal for both high-performance industrial systems and dynamic mobile applications that demand consistent fluid power today.
The Analysis For Rexroth A4VG Closed Circuit Piston Pump Common Breakdown :
1. In this axial piston pump system, the variable displacement mechanism can fail due to wear and control malfunctions, causing inconsistent flow regulation and pressure instability that jeopardizes overall performance, reduces efficiency, and may lead to premature system failure, thereby necessitating timely maintenance and accurate fault diagnosis to ensure reliable operation.
2. In this piston pump, failure of the mechanical sealing elements due to wear or improper installation can lead to internal and external fluid leakages, resulting in loss of hydraulic efficiency, contamination, and system failure, thus requiring careful inspection, prompt replacement, and improved installation practices to maintain optimal performance and longevity.
3. In this piston pump system, malfunction or misadjustment of the pressure relief valves can result in erratic pressure regulation, causing unexpected pressure surges, inefficient energy utilization, and increased wear on hydraulic components, thereby requiring immediate troubleshooting, precise recalibration, and potential replacement to maintain optimal system safety and performance without any delay.