VDC-1B-1A3-U-20 Nachi Variable Vane Pump 2000 psi 30 L/min

Product Overview

The VDN-1B-2A3-20 is a NACHI VDN Series variable displacement vane pump. With a displacement of 21 cc/rev and SAE A 2-bolt flange mounting, this pump delivers peak pressure capability of 3000 psi.

The VDN Series inherits the advanced technology of the VDC Series, incorporating NACHI’s proprietary 3-point ring support system to achieve exceptional high-pressure performance within a compact footprint.

As a premium aftermarket alternative to original NACHI hydraulic pumps, this product offers 100% direct interchangeability with identical mounting dimensions and performance specifications, requiring zero modification to existing systems.

Every unit undergoes 100% simulated duty cycle testing prior to shipment, guaranteeing performance reliability under actual working conditions.

Technical Specifications 

• Model: VDN-1B-2A3-20

• Brand: NACHI

• Series: VDN Variable Vane Pump

• Pump Type: Variable Displacement Vane Pump

• Displacement: 21 cc/rev

• Peak Pressure: 3000 psi

• Pressure Adjustment Range: 290 – 1000 psi

• Flow Rate: 10.5 GPM @ 1800 rpm

• Maximum Speed: 1800 rpm

• Rotation: Clockwise

• Mounting: SAE A 2-Bolt Flange

• Shaft Type: Keyed Shaft, 3/4″ Bore × 3/16″ Key

• Inlet Port: #12 SAE (3/4″)

• Outlet Port: #8 SAE (1/2″)

• Drain Port: #4 SAE (1/4″)

• Weight: Approx. 21 lb

• Country of Manufacture: Japan

Key Technical Advantages

1. 3-Point Ring Support System
NACHI’s proprietary 3-point support system significantly enhances ring stability and high-pressure performance.

2. Exceptional Peak Pressure Capability
Peak pressure of 3000 psi offers a significant advantage among compact variable vane pumps in its class.

3. SAE Standard Mounting
SAE A 2-bolt flange standard mounting interface enables rapid integration with a wide range of standard hydraulic systems.

4. Efficient & Stable Operation
Innovative pressure control and pressure balance mechanisms deliver efficient, stable high-pressure operation.

Application Areas

The VDN-1B-2A3-20 variable vane pump is widely deployed across the following applications:

• Industrial Hydraulic Systems

• Injection Molding Machines

• Machine Tool Hydraulics

• Presses

Expert Maintenance Tips

1. Pre-Start Priming: Prior to initial start-up, fill the pump housing with hydraulic fluid through the drain port.

2. Fluid Cleanliness: Maintain system fluid cleanliness to ISO 4406 18/16/13 or better.

3. Mounting Torque: For SAE A 2-bolt flange mounting, refer to NACHI service manual for specified torque values.

4. Pressure Setting: This model features a pressure adjustment range of 290 – 1000 psi. Adjust slowly to avoid pressure spikes.