Nachi Vane Pump VDC-13A(B)-1A5-1A*20: Model Explanation & Technical Parameters

1. Model Explanation

• VDC: Series Identifier, representing Nachi’s high-pressure type variable volume vane pump series. This series adopts innovative pressure control and pressure balance mechanisms, combined with an original 3-point ring support system, enabling efficient and stable operation at high pressures up to 14 MPa (2000 psi).
• 13: Pump Type & Size, indicating a double vane pump with a specific size specification. The VDC-13 series is designed for medium to large flow hydraulic systems, with foot mounting (Mount A) as standard configuration, and flange mounting (Mount B) as an optional option.
• A(B): Mounting Method, where “A” stands for foot type mounting and “B” stands for flange type mounting. Both mounting methods are optional: foot type mounting is easy to install and suitable for most common hydraulic layouts, while flange type mounting provides better load-bearing capacity and installation stability for layouts requiring firm connections.
• 1A5: Pressure Adjustment Level & Flow Characteristics. “1” indicates the ring size specification, corresponding to a no-load flow rate of 7.9 gpm (30 L/min) at 1800 min⁻¹; “A” represents the constant discharge type, ensuring stable flow output even in the high-pressure range; “5” indicates the fifth level of pressure adjustment range, with an adjustable pressure range of 7 to 14 MPa (1000 to 2000 psi), suitable for high-pressure working conditions.
• 1A: Secondary Pressure/Flow Specification, consistent with the “1A” specification in the front segment (constant discharge type, matching ring size). It ensures matching performance between the two pump units of the double vane pump, maintaining stable and coordinated operation, and the total flow rate can be superimposed according to the working needs.
• *20: Design Number, where “*” is a separator, and “20” represents the specific design version of the pump. This number is related to the internal structure, sealing type, and adjustment mechanism configuration, consistent with the standard design of the VDC series double pumps.

2. Technical Parameters

3. Key Features

• High-Efficiency & Stable High-Pressure Operation: Adopts innovative pressure control, pressure balance mechanisms and an original 3-point ring support system, significantly improving high-pressure operation performance. It delivers efficient and stable performance up to 14 MPa (2000 psi) with minimal power loss, especially at full cutoff[1][5].
• Low Vibration & Quiet Operation: Multiple new mechanisms are adopted to prevent vibration and noise; the 3-point support system for the control piston and bias piston enhances ring stability, minimizing ring vibration and ensuring quiet operation.
• High-Precision Operation with Excellent Responsiveness: An innovative ring stopper eliminates excessive ring displacement, improving response speed. It achieves high-precision operation at all times, including startup, shutdown and load changes.
• Stable Discharge Rate: A revolutionary pressure compensator-type pressure control mechanism ensures a highly stable constant discharge rate even in the high-pressure range, adapting to the requirements of high-pressure hydraulic systems.
• Easy Maintenance & Handling: Pressure adjusting and discharge rate adjusting mechanisms are installed on the same side of the pump body, simplifying maintenance and daily operation.
• Durable Construction: Made of high-quality materials with exquisite craftsmanship, optimized for high-pressure working conditions, ensuring excellent durability and long service life. The double pump structure meets the demand for medium to large flow hydraulic systems, and the optional mounting methods adapt to different installation layouts.