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VDC-3A-1A3, VDC-3B-1A3 Vane pump

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

Nachi Vane Pump VDC-3A-1A3 & VDC-3B-1A3 Specifications

Nachi VDC-3A-1A3 and VDC-3B-1A3 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 with higher pressure demand.

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.
  • 3: Pressure adjustment range, corresponding to the high-pressure regulation specification for the VDC-3 series (higher than the “2” suffix model).

Detailed Technical Parameters

Parameter Item
Nachi VDC-3A-1A3
Nachi VDC-3B-1A3
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 – 1500
290 – 1500
Pressure Adjustment Range (kgf/cm²)
20.4 – 107.1
20.4 – 107.1
Allowable Peak Pressure (psi)
2500
2500
Allowable Peak Pressure (kgf/cm²)
178.6
178.6
Shaft Speed Range (min⁻¹)
800 – 1800
800 – 1800
Weight (lbs)
68
68
Weight (kg)
30.8
30.8
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 (enhanced for high-pressure resistance)
Cast iron (enhanced for high-pressure resistance)

Key Features

  • High-Pressure Performance: Withstand peak pressure up to 2500 psi (178.6 kgf/cm²), and adjustable pressure range of 290-1500 psi, suitable for high-pressure hydraulic systems requiring stable pressure output.
  • Stable Operation: Adopts 3-point ring support system and innovative pressure control mechanism, ensuring stable discharge rate even in high-pressure range, reducing pressure fluctuations.
  • Low Vibration & Noise: Advanced structural design minimizes vibration and noise, providing quiet operation environment, suitable for precision machinery and indoor equipment.
  • Easy Maintenance: Pressure and discharge rate adjusting mechanisms are located on the same side, simplifying maintenance and handling, reducing downtime.
  • High Efficiency & Durability: Innovative mechanical design reduces power loss, improving overall system efficiency and energy saving; enhanced cast iron material ensures durability under high-pressure working conditions.

Application Scope

Nachi VDC-3A-1A3 and VDC-3B-1A3 vane pumps are widely used in various industrial fields requiring high-pressure hydraulic power, including heavy-duty hydraulic presses, large injection molding machines, construction machinery, automated production lines, and precision hydraulic systems. With larger displacement, higher pressure adjustment range and peak pressure, they are an ideal choice for medium and high-pressure hydraulic systems with strict requirements on pressure stability and durability.

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 high-pressure specifications to ensure the service life and performance of the pump, avoiding damage caused by inappropriate oil quality.
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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