NACHI Vane Pump VDR-1B-1A3-22 — High-Performance Industrial Hydraulic Pump Overview
The NACHI VDR-1B-1A3-22 is a premium-grade variable displacement vane pump designed for high efficiency, precision, and durability in modern hydraulic systems. As part of the VDR Series from NACHI-FUJIKOSHI, this model incorporates the latest advancements in hydraulic engineering to deliver stable pressure control, low noise, and energy-efficient operation.
Built with NACHI’s decades of experience in motion and fluid control, the VDR-1B-1A3-22 is widely used in demanding applications such as machine tools, plastic injection molding, press machines, and industrial automation equipment. This model combines compact design, robust materials, and advanced pressure-compensating technology for reliable performance under continuous operation.
1. Product Overview
The VDR-1B-1A3-22 is a pressure-compensated variable displacement vane pump that automatically adjusts its output to match the system’s pressure requirements. When system pressure reaches the set limit, the pump reduces flow delivery to minimize energy consumption.
This feature ensures consistent hydraulic performance while preventing excessive heating and mechanical wear. The result is a quiet, efficient, and environmentally friendly hydraulic power source suitable for precision industrial applications.
2. Technical Specifications
| Parameter |
Specification |
| Model |
VDR-1B-1A3-22 |
| Series |
NACHI VDR Series |
| Pump Type |
Variable displacement vane pump |
| Control Type |
Pressure-compensated automatic flow control |
| Mounting Method |
Flange mount |
| 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 |
| Operating Speed Range |
600–1800 rpm |
| Fluid Type |
Mineral hydraulic oil (ISO VG32–68) |
| Viscosity Range |
20–400 mm²/s (cSt) |
| Temperature Range |
0 °C – +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) |
| Weight |
Approx. 9.4 kg |
3. Structural Design and Materials
The NACHI VDR-1B-1A3-22 incorporates precision components and superior materials to ensure maximum reliability and performance in harsh industrial environments.
| Component |
Material / Feature |
Purpose |
| Pump Body |
High-strength aluminum alloy, anodized |
Provides rigidity and superior heat dissipation |
| Cam Ring |
Hardened alloy steel |
Ensures accurate vane motion and stable displacement |
| Rotor and Vanes |
Precision-ground tool steel |
Reduces friction and maintains tight sealing for high volumetric efficiency |
| Shaft |
Hardened carbon steel |
Ensures durability and smooth torque transfer |
| Bearings |
Dual radial ball bearings |
Maintain stability and reduce vibration |
| Pressure Compensator Assembly |
Integrated regulator mechanism |
Automatically controls displacement and maintains constant system pressure |
| Seals |
NBR (standard) or Viton |
Prevent leakage and withstand variable temperatures |
| Housing Finish |
Anodized for corrosion protection |
Increases lifespan and resistance to hydraulic fluid oxidation |
This combination of design precision and material quality results in excellent hydraulic efficiency and low maintenance requirements.
4. Performance Characteristics
| Performance Parameter |
Typical Value / Description |
| Flow Adjustment |
Automatic, based on system pressure |
| Rated Flow Output |
Approx. 22 L/min at 1800 rpm |
| Pressure Stability |
±1% under variable load |
| Volumetric Efficiency |
90–94% |
| Mechanical Efficiency |
88–91% |
| Response Speed |
< 100 ms (for pressure compensation) |
| Temperature Rise During Continuous Operation |
< 15 °C above ambient |
| Sound Level |
≤ 60 dB(A) at rated load |
| Operating Life |
Over 20,000 hours (standard use) |
The VDR-1B-1A3-22 maintains outstanding stability and quietness even under high-speed or continuous operation, making it ideal for precision-controlled machinery.
5. Key Advantages
-
Energy Efficiency:
Automatically reduces displacement once pressure demand is reached, cutting energy use and lowering power costs.
-
Low Noise and Vibration:
The balanced rotor and optimized vane geometry result in minimal pulsation and extremely quiet operation.
-
Compact, Lightweight Design:
The high-strength aluminum alloy body ensures rigidity while keeping weight low, simplifying installation.
-
Long Service Life:
Hardened internal components and precision machining provide superior wear resistance and extended operational reliability.
-
Consistent Pressure Regulation:
Built-in pressure compensator maintains constant system pressure for stable hydraulic performance.
-
Easy Maintenance:
Modular construction allows for fast cartridge replacement and seal servicing, minimizing downtime.
6. Application Range
The VDR-1B-1A3-22 is suitable for a wide range of industrial applications that require precise hydraulic power and smooth control.
| Industry |
Common Applications |
| Machine Tools |
Hydraulic clamping, feed control, automatic tool changers |
| Plastic Injection Molding Machines |
Pressure and speed control for clamping and injection |
| Press Machines |
Forming, bending, and pressing operations |
| Industrial Robotics |
Hydraulic actuation for arms and grippers |
| Packaging Machinery |
Hydraulic drives for sealing, lifting, and cutting systems |
| Testing Equipment |
Pressure control for test benches and simulation systems |
| Automation Systems |
Hydraulic actuation for conveyor and lifting mechanisms |
Its flexibility and reliability make it a key hydraulic component in both OEM and retrofit systems.
7. Installation and Operating Guidelines
| Parameter |
Recommended Practice |
| Mounting Orientation |
Horizontal installation with shaft alignment |
| Hydraulic Fluid |
Use clean mineral hydraulic oil (ISO VG32–68) |
| Filtration Requirement |
10 µm absolute or finer |
| Startup Procedure |
Prime pump to remove air before operation |
| Operating Temperature |
Maintain oil temperature between 30 °C – 50 °C |
| System Pressure Adjustment |
Adjust compensator screw carefully, do not exceed 14 MPa |
| Suction Line Design |
Use short, large-diameter hose to reduce suction loss |
| Maintenance Interval |
Inspect vanes, seals, and bearings every 4000–6000 hours of use |
Following these installation and operational recommendations ensures long-term performance and minimal maintenance costs.
8. Maintenance and Spare Parts
NACHI supports long-term pump serviceability with dedicated spare parts and maintenance kits.
| Part / Kit |
Code / Description |
| Vane Cartridge Kit |
VDR1B-A3-22-CART |
| Seal Kit (NBR) |
VDR1B-SK-NBR |
| Seal Kit (Viton) |
VDR1B-SK-VIT |
| Bearing Set |
VDR1B-BS |
| Pressure Compensator Unit |
VDR1B-PC-A3 |
| Complete Overhaul Kit |
VDR1B-1A3-22-SET |
Regular use of genuine NACHI parts ensures factory-level performance and extends the pump’s operational lifespan.
9. Comparative Benefits
| Feature |
VDR-1B-1A3-22 (Variable Pump) |
Conventional Fixed Pump |
| Energy Efficiency |
Adjusts flow automatically for load, saving power |
Constant energy draw regardless of demand |
| Noise Level |
≤ 60 dB(A) |
Typically 70 dB(A) or higher |
| Pressure Stability |
Automatic compensation within ±1% |
Requires external relief valves |
| Maintenance |
Simple and modular |
Complex with external components |
| Heat Generation |
Low due to reduced energy loss |
Higher from continuous flow operation |
The VDR-1B-1A3-22 clearly outperforms conventional pumps in both efficiency and operational smoothness.
10. Summary
The NACHI VDR-1B-1A3-22 is a compact, quiet, and energy-efficient variable displacement vane pump built for precision hydraulic control. It features automatic flow regulation, stable pressure compensation, and long-lasting construction for dependable operation in industrial environments.
Key Highlights:
-
Automatic pressure-compensated control
-
Energy-saving, low-noise operation
-
Compact and lightweight structure
-
Long service life with low maintenance
-
Excellent thermal and pressure stability
The VDR-1B-1A3-22 embodies NACHI’s dedication to engineering excellence, providing industries worldwide with a hydraulic solution that maximizes efficiency, reliability, and precision in every application.
Your message must be between 20-3,000 characters!
