Parameter Description of Nachi Vane Pump VDC-2A-1A3 and VDC-2B-1A3

1. General Parameters

• Brand: Nachi (Fujikoshi)
• Series: VDC Series
• Type: High-Pressure Variable Volume Vane Pump
• Flow Characteristics: Constant Discharge Type
• Rotation Direction: Clockwise (rightward) when viewed from the shaft side
• Applicable Fluid: Mineral oil (ISO VG32-68); compatible with water glycol (optional ceramic coating version)
• Operating Temperature Range: -20℃ ~ 80℃

2. Detailed Parameters of VDC-2A-1A3

• Displacement (Capacity): 30 cm³/rev
• No-Load Discharge Rate:
  • 1000 min⁻¹: 30 L/min
  • 1200 min⁻¹: 36 L/min
  • 1500 min⁻¹: 45 L/min
  • 1800 min⁻¹: 54 L/min
• Pressure Adjustment Range: 1.5 ~ 3.5 MPa (15.3 ~ 35.7 kgf/cm²); 2 ~ 7 MPa (20.4 ~ 71.4 kgf/cm²)
• Allowable Peak Pressure: 14 MPa (143 kgf/cm²)
• Speed Range: 800 ~ 1800 min⁻¹
• Mounting Method: Foot Mounting Type
• Weight: 25 kg

3. Detailed Parameters of VDC-2B-1A3

• Displacement (Capacity): 30 cm³/rev
• No-Load Discharge Rate:
  • 1000 min⁻¹: 30 L/min
  • 1200 min⁻¹: 36 L/min
  • 1500 min⁻¹: 45 L/min
  • 1800 min⁻¹: 54 L/min
• Pressure Adjustment Range: 1.5 ~ 3.5 MPa (15.3 ~ 35.7 kgf/cm²); 2 ~ 7 MPa (20.4 ~ 71.4 kgf/cm²)
• Allowable Peak Pressure: 14 MPa (143 kgf/cm²)
• Speed Range: 800 ~ 1800 min⁻¹
• Mounting Method: Flange Type Mounting
• Weight: 25 kg

4. Core Features

• High-Efficiency and Stable High-Pressure Operation: Equipped with innovative pressure control and pressure balance mechanisms, combined with the original 3-point ring support system, ensuring excellent performance at high pressures up to 2000 psi (14 MPa).
• Low Vibration and Noise: The 3-point support system for the control piston and bias piston enhances ring stability, minimizing ring vibration and achieving quiet operation.
• Outstanding Response and High-Precision Operation: The innovative ring stopper eliminates excessive ring displacement, ensuring high-precision operation during startup, shutdown, and load changes.
• Stable Discharge Rate: The revolutionary pressure compensator-type pressure control mechanism ensures a highly stable fixed discharge rate even in the high-pressure range.
• Easy Maintenance: Pressure adjustment and discharge rate adjustment mechanisms are located on the same side of the pump, simplifying maintenance and handling.

5. Notes

• The thrust screw and stopper are precision-adjusted at the factory during assembly; do not touch them arbitrarily.
• An unload circuit is required when the motor is started under Y-delta condition; consult the agent for details on the unload circuit.
• Before initial operation, put the pump discharge side into a no-load state, start and stop the motor repeatedly to bleed air, and then run no-load for at least 10 minutes.
• The back pressure of the drain pipe due to pipe resistance should not exceed 14 psi; the drain pipe must be directly connected to below the tank fluid level.