Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of Rexroth A4VG Pump in China. We warmly welcome you to wholesale bulk Rexroth A4VG Pump for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Overview
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The Rexroth A4VG is a high-performance swashplate-design axial piston variable displacement pump engineered specifically for closed-loop hydrostatic transmission circuits. Positioned as a heavy-duty industrial and mobile series, it combines robust design with precise proportional control capabilities.
Key Advantages
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- Series + Type + Core Function: Rexroth A4VG Axial Piston Variable Displacement Pump with integrated boost pump and high-pressure relief valves for closed-loop applications.
- Precision Hydraulic Control: Designed for smooth, continuous flow adjustment from zero to maximum in both forward and reverse directions, ensuring exceptional responsiveness and low hysteresis.
- High Power Density: Optimized internal geometries deliver maximum power transmission within a compact footprint, making it ideal for demanding high-pressure and high-frequency reversing cycles.
- Integrated Safety and Auxiliaries: Features built-in boost pumps for low-pressure supply and control oil, along with high-pressure relief valves with integrated boost pressure function to protect the hydrostatic circuit from pressure spikes.
Technical Specifications
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|
Parameter |
Specification (Size 28 to 90) |
Specification (Size 125 to 250) |
|---|---|---|
|
Maximum Working Pressure |
400 bar (Continuous) / 450 bar (Peak) |
400 bar (Continuous) / 450 bar (Peak) |
|
Rated Displacement |
28 cc/rev to 90 cc/rev |
125 cc/rev to 250 cc/rev |
|
Rated Flow Rate |
Dependent on displacement and drive speed (e.g., up to 216 L/min at 2400 rpm for Size 90) |
Dependent on displacement and drive speed (e.g., up to 550 L/min at 2200 rpm for Size 250) |
|
Working Temperature Range |
-25 degrees Celsius to +90 degrees Celsius |
-25 degrees Celsius to +90 degrees Celsius |
|
Viscosity Range |
10 mm2/s to 1000 mm2/s (Optimal: 16 mm2/s to 36 mm2/s) |
10 mm2/s to 1000 mm2/s (Optimal: 16 mm2/s to 36 mm2/s) |
|
Control Hysteresis |
Less than 1.5 percent of nominal signal |
Less than 1.5 percent of nominal signal |
|
Response Time |
Fast dynamic response tailored for closed-loop shifting (under 50 milliseconds depending on control type) |
Fast dynamic response tailored for closed-loop shifting (under 60 milliseconds depending on control type) |
Applications
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- Road Rollers and Compactors: Installed in the main propulsion closed-loop transmission system to provide infinitely variable speed control, smooth directional changes, and dynamic braking capability.
- Combine Harvesters and Agricultural Vehicles: Used in hydrostatic ground drive transmissions to ensure precise speed regulation matching crop load and terrain resistance.
- Concrete Mixers and Truck-Mounted Pumps: Drives the drum rotation and secondary auxiliary functions, providing high starting torque and reliable continuous operation under high pressures.
- Forestry Forwarders and Harvesters: Powers multi-wheel hydrostatic drive systems capable of navigating rough, steep terrains with high tractive force and responsive control.
Related Models
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|
Series and Model |
Nominal Displacement (cc/rev) |
Typical Application Class |
|---|---|---|
|
Rexroth A4VG28 |
28 |
Compact mobile machinery, mini rollers |
|
Rexroth A4VG40 |
40 |
Skid-steer loaders, compact trenchers |
|
Rexroth A4VG56 |
56 |
Medium-duty road rollers, agricultural drives |
|
Rexroth A4VG71 |
71 |
Concrete mixers, medium excavators |
|
Rexroth A4VG90 |
90 |
Combine harvesters, forestry forwarders |
|
Rexroth A4VG125 |
125 |
Large wheel loaders, heavy industrial drives |
|
Rexroth A4VG180 |
180 |
Large road milling machines, crawler cranes |
|
Rexroth A4VG250 |
250 |
Heavy-duty mining equipment, marine winches |
FAQ
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Q1: How do I confirm the correct pump model for my machine?
A: Check the nameplate on your existing Rexroth pump for the complete model code and part number. If the nameplate is missing, provide us with your equipment brand, model, displacement requirement, and control type details.
Q2: What is the recommended filtration precision for the A4VG pump?
A: To ensure maximum service life and prevent premature valve wear, maintain a fluid cleanliness level of at least ISO 4406 20/18/15 using a 10-micron or finer absolute filter element.
Q3: What type of hydraulic oil should be used?
A: High-quality anti-wear hydraulic oils conforming to DIN 51524 part 2 or 3 (HLP or HVLP), or synthetic hydraulic fluids with appropriate viscosity grades, are recommended.
Contact Us
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Send us your inquiry with the pump model, nameplate details, or application requirements, and our engineers will respond promptly with professional advice and purchasing support.
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