NACHI Vane Pump VDR-1B-1A3-13 — Efficient Hydraulic Power for Precision Machinery
The NACHI VDR-1B-1A3-13 is a high-efficiency variable displacement vane pump developed to meet the stringent performance requirements of industrial hydraulic systems. Belonging to NACHI’s well-regarded VDR Series, this model integrates advanced pressure-compensated control technology, providing precise flow regulation, energy efficiency, and quiet operation. Designed for applications that demand reliability and stability — such as machine tools, injection molding machines, press equipment, and automated manufacturing systems — the VDR-1B-1A3-13 offers exceptional performance and durability in compact form.
Built with precision engineering and robust materials, the pump ensures long service life, minimal energy loss, and superior pressure stability, making it a trusted choice for high-performance hydraulic applications.
1. Product Overview
The VDR-1B-1A3-13 features an intelligent pressure-compensated variable displacement mechanism that automatically adjusts flow according to system pressure requirements. This results in reduced power consumption, less heat generation, and extended fluid life. When system demand decreases, the pump’s displacement automatically reduces, preventing wasted energy and minimizing operational costs.
Compact yet powerful, the VDR-1B-1A3-13 embodies NACHI’s engineering philosophy — delivering precision, durability, and efficiency in every rotation.
2. Technical Specifications
| Parameter |
Specification |
| Model Number |
VDR-1B-1A3-13 |
| Pump Type |
Variable displacement vane pump |
| Series |
NACHI VDR Series |
| Control Type |
Pressure-compensated automatic control |
| Mounting Type |
Flange-mounted |
| Rotation Direction |
Clockwise (viewed from shaft end) |
| Displacement Range |
8–25 cm³/rev |
| Rated Pressure |
12 MPa (1740 psi) |
| Maximum Pressure |
14 MPa (2030 psi) |
| Nominal Flow (at 1800 rpm) |
Approx. 22 L/min |
| Speed Range |
600–1800 rpm |
| Suction Pressure |
0.03 MPa abs (minimum) |
| Hydraulic Fluid |
Mineral-based oil (ISO VG32–68) |
| Viscosity Range |
20–400 mm²/s (cSt) |
| Operating Temperature |
0 °C – +60 °C |
| Noise Level |
≤ 60 dB(A) |
| Shaft Type |
Straight keyed shaft |
| Seal Material |
NBR (standard), Viton (optional) |
| Weight |
Approx. 9.5 kg |
3. Construction and Design Features
Each component in the VDR-1B-1A3-13 is crafted with precision to ensure maximum performance and reliability under high-demand conditions. NACHI’s meticulous design approach ensures optimal pressure regulation, reduced mechanical wear, and smooth hydraulic operation.
| Component |
Material / Feature |
Function / Benefit |
| Pump Casing |
Anodized aluminum alloy |
Lightweight, strong, and corrosion-resistant |
| Cam Ring |
Hardened alloy steel |
Provides precise vane movement and consistent pressure |
| Rotor & Vanes |
Precision-ground tool steel |
Enhances volumetric efficiency and reduces internal leakage |
| Shaft |
Heat-treated carbon steel |
Ensures stability and torque transmission |
| Bearings |
Double ball bearings |
Reduces friction and vibration for smoother operation |
| Pressure Compensator |
Integrated control system |
Maintains constant output pressure automatically |
| Seals |
NBR / Viton |
Prevents leaks and resists oil degradation |
| Surface Finish |
Fine-machined internal surfaces |
Ensures low friction and quiet running performance |
The structural integrity and surface precision of the VDR-1B-1A3-13 minimize hydraulic losses, resulting in outstanding energy efficiency and reduced maintenance needs.
4. Performance Characteristics
| Parameter |
Typical Value / Description |
| Rated Flow Output (at 1800 rpm) |
22 L/min |
| Pressure Regulation Accuracy |
±1% |
| Volumetric Efficiency |
92–94% |
| Mechanical Efficiency |
88–91% |
| Response Time |
< 100 milliseconds |
| Noise Level |
≤ 60 dB(A) |
| Temperature Rise (Continuous Operation) |
< 15 °C above ambient |
| Service Life |
Over 20,000 operating hours (under standard conditions) |
These performance attributes make the pump exceptionally stable for continuous use in high-precision industrial systems.
5. Key Advantages
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Energy Efficiency:
The pump’s pressure-compensated control automatically minimizes flow during low-load operation, reducing power consumption and operating costs.
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Low Noise Design:
Optimized rotor balance and precise vane geometry deliver smooth operation with minimal noise and vibration.
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Consistent Pressure Output:
Built-in compensator ensures steady pressure regardless of load changes, ideal for precision applications.
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Compact and Lightweight Construction:
The aluminum housing reduces weight and allows flexible mounting in confined spaces.
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Extended Service Life:
Wear-resistant materials and optimized lubrication pathways ensure long-term reliability.
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Reduced Heat Generation:
Efficient hydraulic design limits energy loss and oil temperature rise, extending fluid life.
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Ease of Maintenance:
Modular components enable quick servicing and replacement, minimizing downtime.
6. Application Areas
The VDR-1B-1A3-13 supports a broad range of industrial applications that require precision, efficiency, and reliability.
| Industry |
Typical Use |
| Machine Tools |
Hydraulic clamping, feed control, spindle lubrication |
| Plastic Injection Molding |
Pressure control for injection and clamping units |
| Press Machinery |
Bending, forming, and metal stamping |
| Automation Systems |
Hydraulic actuation for robotics and conveyors |
| Textile and Paper Equipment |
Tension and roller control systems |
| Testing Equipment |
Pressure generation and calibration |
| Hydraulic Power Units (HPUs) |
Efficient power source for multiple systems |
Its reliability and efficiency make it a preferred choice in systems requiring continuous, stable operation.
7. Installation and Operation Guidelines
| Parameter |
Recommendation |
| Mounting Orientation |
Horizontal preferred for best lubrication |
| Fluid Type |
Clean mineral oil (ISO VG32–68) |
| Filtration Requirement |
≤ 10 µm absolute filter |
| Operating Temperature Range |
Maintain between 30 °C – 50 °C |
| Startup Procedure |
Prime the pump with oil before first operation |
| Pressure Adjustment |
Adjust slowly; do not exceed 14 MPa |
| Suction Line Design |
Keep short and straight to avoid cavitation |
| Maintenance Interval |
Inspect vanes, bearings, and seals every 4000–6000 hours |
Following these guidelines ensures stable, long-lasting operation with minimal wear.
8. Maintenance and Replacement Parts
NACHI provides complete service kits for the VDR-1B-1A3-13 to simplify maintenance and ensure continued efficiency.
| Component |
Replacement Kit / Part Code |
| Vane Cartridge Kit |
VDR1B-1A3-13-CART |
| Seal Kit (Standard NBR) |
VDR1B-SK-NBR |
| Seal Kit (Viton) |
VDR1B-SK-VIT |
| Bearing Set |
VDR1B-BS |
| Pressure Compensator Unit |
VDR1B-PC-A3 |
| Complete Overhaul Kit |
VDR1B-1A3-13-SET |
Using genuine NACHI parts ensures compatibility, reliability, and optimum performance over time.
9. Comparison with Fixed-Displacement Pumps
| Feature |
VDR-1B-1A3-13 (Variable) |
Fixed-Displacement Pump |
| Energy Consumption |
Automatically adjusts to load |
Constant energy use |
| Pressure Control |
Built-in automatic regulation |
Requires external valves |
| Noise Level |
≤ 60 dB(A) |
Typically 70–75 dB(A) |
| Heat Generation |
Low |
High due to continuous output |
| Maintenance |
Simple modular design |
More complex external setup |
| System Efficiency |
High (up to 94%) |
Moderate (around 85%) |
This comparison demonstrates the pump’s superior efficiency and advanced control features compared to traditional fixed systems.
10. Conclusion
The NACHI VDR-1B-1A3-13 represents the perfect balance of performance, reliability, and efficiency. Its pressure-compensated variable displacement design ensures precise control, reduced energy use, and low operating noise — all in a compact, durable package.
Key Highlights:
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Intelligent automatic flow regulation
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Low noise and vibration
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High efficiency with long service life
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Compact, corrosion-resistant aluminum housing
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Easy installation and maintenance
For industries seeking dependable, efficient, and quiet hydraulic performance, the VDR-1B-1A3-13 from NACHI delivers exceptional results, making it a cornerstone of modern, energy-efficient hydraulic systems.