NACHI Vane Pump VDR-1B-2A2-13 — Precision Hydraulic Performance for Demanding Applications
The NACHI VDR-1B-2A2-13 is an advanced variable displacement vane pump engineered for reliability, energy efficiency, and precise hydraulic control. As part of NACHI’s VDR series, this model incorporates pressure-compensated technology to automatically regulate fluid flow according to system demand, ensuring consistent performance with minimal energy loss. Designed for use in high-precision industrial applications such as machine tools, metal presses, injection molding, and automated machinery, the VDR-1B-2A2-13 delivers quiet, stable, and long-lasting operation under continuous load conditions.
With its combination of superior mechanical design, advanced control features, and compact construction, this pump exemplifies NACHI’s reputation for durable and efficient hydraulic solutions.
1. Product Overview
The VDR-1B-2A2-13 is built around NACHI’s proven pressure-compensated variable displacement principle. When the hydraulic system reaches the set pressure, the pump automatically reduces displacement, maintaining a stable flow and preventing unnecessary energy consumption. This not only ensures smoother system operation but also minimizes heat generation and extends the lifespan of both the pump and hydraulic fluid.
Its precise flow regulation, low noise, and high efficiency make it ideal for continuous operation in demanding production environments where reliability and precision are essential.
2. Technical Specifications
| Parameter |
Specification |
| Model |
VDR-1B-2A2-13 |
| Pump Type |
Variable displacement vane pump |
| Series |
NACHI VDR Series |
| Control Type |
Pressure-compensated automatic control |
| Mounting Type |
Flange mount |
| Rotation Direction |
Clockwise (viewed from shaft end) |
| Displacement Range |
10–25 cm³/rev |
| Rated Pressure |
12 MPa (1740 psi) |
| Maximum Pressure |
14 MPa (2030 psi) |
| Flow Rate (at 1800 rpm) |
Approx. 22–26 L/min |
| Speed Range |
600–1800 rpm |
| Hydraulic Fluid |
Mineral oil-based (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) |
| Pump Weight |
Approx. 10.2 kg |
3. Construction and Material Design
The VDR-1B-2A2-13 is designed with high-quality materials and precision-engineered components to provide long-lasting performance. Each part is manufactured to tight tolerances to ensure smooth fluid dynamics, reduced vibration, and minimal mechanical wear.
| Component |
Material / Feature |
Function / Advantage |
| Pump Housing |
High-strength aluminum alloy |
Provides rigidity and lightweight durability |
| Cam Ring |
Hardened tool steel |
Ensures consistent vane operation and wear resistance |
| Rotor & Vanes |
Precision-ground steel |
Delivers high volumetric efficiency and smooth flow |
| Shaft |
Carbon steel, heat-treated |
Offers high strength and torque transmission |
| Bearings |
Dual radial ball bearings |
Minimize vibration and improve operational life |
| Pressure Compensator |
Integrated control mechanism |
Maintains constant system pressure automatically |
| Seals |
NBR or Viton |
Prevent leakage and resist high temperatures |
| Surface Finish |
Fine-machined internal surfaces |
Reduces friction and noise for efficient flow performance |
The combination of a robust mechanical framework and precision engineering ensures that this pump delivers smooth, quiet, and consistent operation.
4. Performance Characteristics
| Performance Parameter |
Value / Description |
| Flow Output (at 1800 rpm) |
22–26 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 |
| Expected Service Life |
20,000+ operating hours |
The pump’s high precision and rapid response capability make it ideal for systems that require smooth, accurate hydraulic control.
5. Key Advantages
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Energy Efficiency:
Automatic adjustment of displacement reduces energy consumption when system demand is low, lowering overall operating costs.
-
Stable Pressure and Flow Control:
The built-in compensator ensures steady performance, even with fluctuating loads or speeds.
-
Low Noise Operation:
Balanced rotor design and optimized vane geometry minimize vibration and acoustic emissions.
-
Compact and Lightweight:
The aluminum housing offers excellent strength while keeping overall weight low for easy installation.
-
Extended Durability:
High-quality materials and advanced heat treatment techniques ensure a long service life with minimal maintenance.
-
Minimal Heat Generation:
Efficient internal flow paths minimize energy loss and keep the hydraulic fluid temperature stable.
-
Ease of Maintenance:
Modular construction simplifies inspection and component replacement.
6. Application Areas
The VDR-1B-2A2-13 is designed to meet the demands of industries where performance, efficiency, and reliability are essential.
| Industry |
Application |
| Machine Tools |
Hydraulic feed control, spindle lubrication, and clamping systems |
| Plastic Injection Molding |
Pressure regulation for injection and clamping units |
| Press Machinery |
Metal forming, bending, and stamping |
| Automation Equipment |
Robotic actuators, conveyors, and precision hydraulic drives |
| Textile and Paper Production |
Web tension control and roller systems |
| Testing and Calibration Equipment |
Pressure and flow test benches |
| Hydraulic Power Units |
Compact power generation for multi-axis machinery |
Its reliability and high-efficiency design make it suitable for both stationary systems and dynamic industrial applications.
7. Installation and Maintenance Guidelines
| Parameter |
Recommendation |
| Mounting Orientation |
Horizontal preferred for optimal lubrication |
| Hydraulic Fluid Type |
Use clean mineral-based oil (ISO VG32–68) |
| Filtration Requirement |
≤ 10 µm absolute filter |
| Temperature Range |
Maintain fluid temperature between 30 °C – 50 °C |
| Startup Procedure |
Prime pump with fluid before first use |
| Pressure Adjustment |
Adjust compensator gradually; avoid exceeding 14 MPa |
| Suction Line Design |
Keep line short and direct to reduce pressure loss |
| Maintenance Interval |
Inspect seals and vanes every 4000–6000 hours |
Following these guidelines ensures stable operation and long service life.
8. Maintenance and Spare Parts
NACHI provides original maintenance kits for the VDR-1B-2A2-13, ensuring reliable repair and simplified servicing.
| Component |
Replacement Part Code |
| Vane Cartridge Kit |
VDR1B-2A2-13-CART |
| Seal Kit (NBR) |
VDR1B-SK-NBR |
| Seal Kit (Viton) |
VDR1B-SK-VIT |
| Bearing Set |
VDR1B-BS |
| Pressure Compensator Assembly |
VDR1B-PC-A2 |
| Complete Overhaul Kit |
VDR1B-2A2-13-SET |
Using genuine NACHI replacement parts maintains hydraulic efficiency and prevents premature wear.
9. Comparison with Conventional Pumps
| Feature |
VDR-1B-2A2-13 (Variable) |
Fixed Displacement Pump |
| Energy Efficiency |
Adjusts output automatically |
Constant flow regardless of demand |
| Pressure Control |
Built-in compensator |
Requires external valve system |
| Noise Level |
≤ 60 dB(A) |
70–75 dB(A) typical |
| Heat Generation |
Low |
High due to continuous flow |
| Maintenance |
Simple modular design |
Complex and time-consuming |
| Service Life |
Long, optimized for dynamic load |
Shorter under variable demand |
This comparison highlights the superior efficiency and performance of the VDR-1B-2A2-13 over traditional fixed-displacement hydraulic pumps.
10. Conclusion
The NACHI VDR-1B-2A2-13 is a high-performance variable displacement vane pump that embodies precision, efficiency, and reliability. Its pressure-compensated control, low noise operation, and compact design make it ideal for advanced industrial hydraulic systems.
Key Highlights:
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Intelligent automatic displacement adjustment
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High efficiency with reduced energy consumption
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Low noise and smooth operation
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Long service life and minimal maintenance
-
Compact and durable construction
Whether used in a machine tool, press system, or automated assembly line, the VDR-1B-2A2-13 provides the perfect balance of power, control, and durability, making it a cornerstone of NACHI’s reputation for quality hydraulic engineering.