NACHI Vane Pump VDR-1B-1A4-22 — Advanced Hydraulic Power Solution
The NACHI VDR-1B-1A4-22 is an industrial-grade variable displacement vane pump engineered to deliver exceptional hydraulic performance with energy efficiency, low noise, and reliable pressure stability. As a member of NACHI’s renowned VDR Series, this model integrates precise pressure-compensated control technology, ensuring that the pump automatically adjusts its flow rate according to system demand. This makes it ideal for applications that require both precision and power efficiency, such as machine tools, hydraulic presses, plastic injection systems, and automation equipment.
NACHI’s advanced hydraulic engineering guarantees that the VDR-1B-1A4-22 operates with smooth, quiet performance and exceptional durability, even under continuous high-pressure conditions.
1. Product Overview
The VDR-1B-1A4-22 pump is a pressure-compensated variable displacement vane pump that optimizes hydraulic performance by maintaining constant pressure and adjusting flow based on system requirements. It minimizes unnecessary energy use and heat generation, providing an environmentally efficient solution for high-performance hydraulic systems.
Its compact design, robust materials, and precision manufacturing make it highly suitable for use in industrial environments where stability, reliability, and efficiency are critical.
2. Technical Specifications
| Parameter |
Specification |
| Model |
VDR-1B-1A4-22 |
| Pump Type |
Variable displacement vane pump |
| Series |
NACHI VDR Series |
| Control Type |
Pressure-compensated flow control |
| Mounting Type |
Flange-mounted |
| Rotation Direction |
Clockwise (viewed from shaft end) |
| Displacement Range |
8–25 cm³/rev (variable) |
| 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 |
| Hydraulic Fluid |
Mineral-based oil (ISO VG32–68) |
| Viscosity Range |
20–400 mm²/s (cSt) |
| Operating Temperature |
0 °C to +60 °C |
| Suction Pressure |
0.03 MPa abs (minimum) |
| Noise Level |
≤ 60 dB(A) |
| Shaft Type |
Straight keyed shaft |
| Seal Material |
NBR standard (Viton optional) |
| Pump Weight |
Approx. 9.5 kg |
3. Design and Construction Features
The VDR-1B-1A4-22 demonstrates NACHI’s commitment to advanced design precision and high-quality manufacturing. The pump is built with robust components that ensure consistent performance and durability in high-pressure operations.
| Component |
Material / Feature |
Function |
| Pump Housing |
High-strength anodized aluminum alloy |
Lightweight, corrosion-resistant, and provides excellent heat dissipation |
| Cam Ring |
Hardened steel, precision-ground |
Ensures smooth vane movement and stable pressure control |
| Rotor and Vanes |
High-grade alloy steel |
Reduces friction and provides long wear life |
| Shaft |
Heat-treated carbon steel |
Ensures torque stability and minimizes vibration |
| Bearings |
Dual radial ball bearings |
Support shaft balance and extend operational life |
| Pressure Compensator |
Integrated design |
Automatically regulates displacement to maintain desired pressure |
| Seals and O-rings |
NBR or Viton |
Leak-resistant, capable of handling wide temperature variations |
The result is a pump that operates quietly, efficiently, and with minimal maintenance requirements.
4. Performance Characteristics
| Parameter |
Typical Value / Description |
| Displacement Control |
Fully automatic via built-in compensator |
| 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 During Continuous Operation |
< 15 °C above ambient |
| Service Life |
Over 20,000 hours under normal conditions |
These performance figures demonstrate the pump’s balance between precision, efficiency, and longevity.
5. Product Advantages
-
Energy Efficiency:
Automatically adjusts displacement based on load, minimizing power consumption and reducing operating costs.
-
Low Noise Operation:
Advanced rotor balance and precision vane design produce smooth operation and significantly lower noise levels.
-
Stable Pressure Control:
The integrated pressure-compensating mechanism ensures consistent output pressure even under fluctuating load conditions.
-
Compact and Lightweight:
The high-strength aluminum housing delivers robust performance in a compact form factor, simplifying installation.
-
Reduced Heat Generation:
Efficient hydraulic design minimizes internal losses, reducing oil temperature and extending fluid life.
-
Ease of Maintenance:
Modular design allows quick disassembly and replacement of key components such as vanes, seals, and bearings.
-
Durability and Reliability:
Built to withstand continuous industrial use with high-grade materials and precise engineering tolerances.
6. Typical Applications
The VDR-1B-1A4-22 is widely used in industries that require precise pressure control, low noise, and efficient operation.
| Industry |
Common Applications |
| Machine Tools |
Hydraulic feed control, tool changers, clamping systems |
| Plastic Injection Molding |
Clamping and injection unit pressure regulation |
| Press Machines |
Bending, forming, and stamping hydraulic control |
| Industrial Automation |
Hydraulic actuators, conveyors, and lifting mechanisms |
| Textile and Paper Machinery |
Hydraulic tension and roller drive systems |
| Testing and Calibration Equipment |
Controlled hydraulic flow and pressure generation |
| Hydraulic Power Units (HPUs) |
Energy-efficient pressure control systems |
Its versatility makes it suitable for a wide variety of industrial applications requiring precision and durability.
7. Operating Recommendations
| Parameter |
Recommended Practice |
| Installation Orientation |
Horizontal mounting preferred for best lubrication |
| Start-Up Procedure |
Prime the pump to eliminate air before operation |
| Operating Temperature Range |
Maintain between 30 °C – 50 °C for best performance |
| Hydraulic Fluid |
Use clean mineral oil (ISO VG32–68) |
| Filtration Requirement |
Use 10 µm absolute filter or finer |
| Pressure Setting |
Adjust compensator slowly; do not exceed 14 MPa |
| Suction Line Design |
Keep short and direct to prevent cavitation |
| Maintenance Interval |
Check seals and bearings every 4000–6000 hours |
Proper installation and maintenance ensure consistent performance and extended service life.
8. Maintenance and Spare Parts
To simplify service and maximize uptime, NACHI provides complete maintenance kits for the VDR-1B-1A4-22.
| Component |
Part Number / Description |
| Vane Cartridge Assembly |
VDR1B-A4-22-CART |
| Seal Kit (Standard NBR) |
VDR1B-SK-NBR |
| Seal Kit (High-Temp Viton) |
VDR1B-SK-VIT |
| Bearing Set |
VDR1B-BS |
| Pressure Compensator Assembly |
VDR1B-PC-A4 |
| Complete Overhaul Kit |
VDR1B-1A4-22-SET |
All components are precision-engineered to NACHI’s original specifications for guaranteed compatibility and performance.
9. Comparison with Fixed-Displacement Pumps
| Aspect |
VDR-1B-1A4-22 (Variable Pump) |
Fixed-Displacement Pump |
| Energy Efficiency |
Adjusts output flow automatically |
Constant energy draw |
| Pressure Regulation |
Automatic pressure compensation |
Requires external relief valves |
| Noise Level |
≤ 60 dB(A) |
70–75 dB(A) typical |
| Maintenance |
Modular and simple |
Complex and more frequent |
| Heat Generation |
Low |
High, due to continuous flow |
The VDR-1B-1A4-22’s variable design significantly enhances energy savings and operational stability compared to conventional pumps.
10. Conclusion
The NACHI VDR-1B-1A4-22 is a compact, high-efficiency variable displacement vane pump that delivers superior hydraulic performance for industrial applications. Its advanced pressure-compensated design provides precise control, minimal energy waste, and long-term reliability.
Key Benefits:
-
Energy-saving automatic flow adjustment
-
Quiet and vibration-free operation
-
Stable pressure control for precision machinery
-
Compact and robust aluminum body
-
Easy maintenance and long service life
With its outstanding engineering quality and operational efficiency, the VDR-1B-1A4-22 continues to represent NACHI’s excellence in hydraulic technology, offering an ideal solution for energy-conscious and performance-driven industrial systems.
Your message must be between 20-3,000 characters!
