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VDR-1A-1A2-13 NACHI pumps

   VDR Series: VDR-1A、VDR-2A、VDR-1B、VDR-2B
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Description

Parameters and Model Explanation of NACHI Hydraulic Pump VDR-1A-1A2-13

1. Model Explanation

The model VDR-1A-1A2-13 follows NACHI’s standard naming convention for VDR series variable vane pumps, where each segment represents specific structural and performance characteristics. The detailed breakdown is as follows:
  • VDR: Series Code, indicating NACHI VDR series variable volume vane pump, which is an economical and energy-saving basic model with compact structure and low noise operation.
  • 1: Pump Size, representing the 1-series pump/head side size, corresponding to a smaller displacement range and overall structural dimension compared with the 2-series pump.
  • A: Mounting Method, standing for foot-mounted type, which is a common mounting way for hydraulic pumps, suitable for scenarios requiring stable installation and easy maintenance in hydraulic systems.
  • 1: Ring Size, indicating the specified ring/head ring size for the 1-series pump, which is matched with the smaller internal structure to ensure stable operation and reliable sealing performance.
  • A: Flow Characteristic, representing fixed displacement type, meaning the pump can maintain a stable discharge flow under specified working conditions.
  • 2: Pressure Adjustment Range, corresponding to 30-60 psi (equivalent to 2.1-4.1 MPa), which is the adjustable range of the pump’s working pressure to meet different low-to-medium pressure system requirements.
  • 13: Design Number, indicating the 13th design series of the VDR pump[superscript:3]. This design is an upgraded version based on the previous 11-12 designs, with optimized internal structure, better noise reduction performance and improved operational stability while keeping the mounting dimensions unchanged.

2. Technical Parameters

The following parameters are based on NACHI official technical data, ensuring high accuracy and applicability for actual application and selection:
Parameter Item
Specification
Pump Type
Variable Volume Single Vane Pump
Displacement
Approx. 15 cm³/rev
No-Load Discharge Flow (at 1800 rpm)
Approx. 27 L/min
Pressure Adjustment Range
2.1-4.1 MPa (30-60 psi)
Maximum Allowable Peak Pressure
8 MPa (1160 psi)
Speed Range
750-1800 rpm
Shaft Seal
Type 1 (Standard Shaft Seal)
Working Medium
Mineral Oil, ISO VG32-68 (Viscosity Index ≥ 90)
Working Oil Temperature Range
10-60℃
Weight
Approx. 14.0 kg (30.9 lb)
Key Features
High efficiency with minimal power loss, quiet operation, compact design, precise performance and quick response, long service life

3. Supplementary Notes

1. The 13th design series (marked by “13” in the model) is interchangeable with the previous 11-12 design series in terms of mounting dimensions, facilitating replacement and maintenance.
2. The pump operates clockwise when viewed from the shaft side, and the suction pipe should be directly connected below the oil level to ensure the back pressure is not more than 0.03 MPa.
3. For optimal performance, it is recommended to use R&O type or wear-resistant hydraulic oil, and maintain the oil cleanliness within NAS 10 grade.

 VDR series NACHI VANE PUMP

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