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VDC-3A-1A2, VDC-3B-1A2 Vane pump

   VDC Series:VDC-1A/B; VDC-2A/B; VDC-3A/B 
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Description

Nachi Vane Pump VDC-3A-1A2 & VDC-3B-1A2 Specifications

Nachi VDC-3A-1A2 and VDC-3B-1A2 are high-pressure variable displacement vane pumps designed for industrial hydraulic systems, featuring stable performance, low noise, and high efficiency. This document provides detailed technical parameters, model interpretation, and key features to help users quickly understand and select the product. Suitable for machinery, automation, engineering equipment, and other fields requiring reliable hydraulic power.

Model Interpretation

The model codes of Nachi VDC series vane pumps have clear meanings, helping to identify product specifications quickly:
  • VDC: Series name, representing Nachi high-pressure variable displacement vane pump.
  • 3: Pump size, indicating the basic structural size of the pump (larger than the VDC-2 series).
  • A/B: Mounting method (A: Foot type mounting; B: Flange mounting optional).
  • 1: Ring size, corresponding to the matching size of the pump ring.
  • A: Flow characteristics, meaning constant discharge type for stable flow output.
  • 2: Pressure adjustment range, corresponding to the standard pressure regulation specification for the VDC-3 series.

Detailed Technical Parameters

Parameter Item
Nachi VDC-3A-1A2
Nachi VDC-3B-1A2
Displacement (in³/rev)
3.1
3.1
No-Load Discharge Rate (gpm) @ 1500 min⁻¹
20.6
20.6
No-Load Discharge Rate (gpm) @ 1800 min⁻¹
24.7
24.7
Pressure Adjustment Range (psi)
290 – 1200
290 – 1200
Pressure Adjustment Range (kgf/cm²)
20.4 – 85.7
20.4 – 85.7
Allowable Peak Pressure (psi)
2000
2000
Allowable Peak Pressure (kgf/cm²)
143
143
Shaft Speed Range (min⁻¹)
800 – 1800
800 – 1800
Weight (lbs)
66
66
Weight (kg)
30
30
Mounting Method
Foot type mounting (Sub plate type, sub plate not included)
Flange mounting optional
Flow Characteristics
Constant discharge type
Constant discharge type
Design Number
20
20
Rotation Direction
Right from shaft end
Right from shaft end
Material
Cast iron
Cast iron

Key Features

  • High-Pressure Performance: Withstand peak pressure up to 2000 psi (143 kgf/cm²), and adjustable pressure range of 290-1200 psi, suitable for high-pressure hydraulic systems.
  • Stable Operation: Adopts 3-point ring support system and innovative pressure control mechanism, ensuring stable discharge rate even in high-pressure range.
  • Low Vibration & Noise: Advanced structural design minimizes vibration and noise, providing quiet operation environment.
  • Easy Maintenance: Pressure and discharge rate adjusting mechanisms are located on the same side, simplifying maintenance and handling.
  • High Efficiency: Innovative mechanical design reduces power loss, improving overall system efficiency and energy saving; larger displacement meets higher flow demand.

Application Scope

Nachi VDC-3A-1A2 and VDC-3B-1A2 vane pumps are widely used in various industrial fields, including hydraulic presses, injection molding machines, construction machinery, automated production lines, and other equipment that requires stable and reliable hydraulic power supply. With larger displacement and wider pressure adjustment range, they are an ideal choice for medium and high-pressure hydraulic systems with higher flow demand.

Note

1. The parameters are standard values; actual performance may vary slightly according to the working environment and medium used.
2. It is recommended to use hydraulic oil that meets Nachi’s specifications to ensure the service life and performance of the pump.
3. For more detailed installation and maintenance guidelines, please refer to the official Nachi VDC series product manual.

VDC series Nachi vane pump

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