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VDR-2B-2A3-22 NACHI Variable vane pump
VDR Series: VDR-1A、VDR-2A、VDR-1B、VDR-2B
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Description
NACHI Variable Vane Pump VDR-2B-2A3-22: Model Explanation & Technical Parameters
1. Model Code Explanation
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Code Segment
|
Meaning
|
Detailed Description
|
|---|---|---|
|
VDR
|
Series
|
Variable Volume Vane Pump, belonging to the VDR22 design series. It is an economical model equipped with mechanical pressure compensation, suitable for general industrial hydraulic systems.
|
|
2B
|
Pump Size & Mounting Type
|
Size 2: Classified as medium-large displacement; B: Flange type mounting (distinguished from Type A, which is foot type mounting), facilitating stable installation in various equipment.
|
|
2A3
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Control Type & Displacement Grade
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2A3 indicates the pressure compensation control type, which can automatically adjust the displacement according to the system pressure. It corresponds to an intermediate displacement grade, with a no-load displacement of approximately 23 cm³/rev.
|
|
22
|
Design & Seal Type
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Standard seal configuration, compatible with ISO VG32 and ISO VG68 hydraulic fluids, ensuring good sealing performance and adaptability to common hydraulic working conditions.
|
2. Core Technical Parameters
|
Parameter
|
Value
|
Unit
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Notes
|
|---|---|---|---|
|
Displacement (No-load)
|
23
|
cm³/rev
|
Nominal no-load displacement under standard conditions
|
|
Max Working Pressure
|
14 (2030)
|
MPa (psi)
|
Stable and efficient operation range for long-term use
|
|
Allowable Peak Pressure
|
16 (2320)
|
MPa (psi)
|
Short-time peak load, not suitable for long-term operation
|
|
Speed Range
|
800–1800
|
r/min
|
Recommended operating speed to ensure pump performance and service life
|
|
No-load Flow Rate
|
29
|
ℓ/min
|
Measured at the standard speed of 1500 r/min, matching the no-load displacement
|
|
Flow Range
|
0–29
|
ℓ/min
|
Variable volume adjustment, adjustable according to system demand, consistent with displacement
|
|
Rotation Direction
|
Clockwise
|
–
|
Observed from the shaft end (standard configuration)
|
|
Net Weight
|
≈17
|
kg
|
Approximate value, subject to slight differences due to production batches
|
|
Fluid Viscosity
|
ISO VG32 / VG68
|
–
|
VG32 for low-pressure working conditions, VG68 for high-pressure; viscosity index ≥90
|
3. Key Features
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High Efficiency & Energy Saving: The leak-free pressure balance structure effectively reduces internal leakage, minimizes power loss, and achieves energy-saving effects, especially in the full cutoff state, which is suitable for the working characteristics of the VDR-2B-2A3-22 pump.
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Quiet Operation: Adopting quiet journal bearings and optimized suction/discharge port design, which significantly reduces noise and vibration during operation, improving the working environment and adapting to the stable operation needs of the pump.
-
Precise Response: Equipped with a special bias piston mechanism, it ensures fast and stable ON-OFF/OFF-ON response, adapting to the dynamic adjustment needs of the hydraulic system matched with the VDR-2B-2A3-22 pump.
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Compact Design: The overall structure is compact, easy to install and maintain; the pressure and flow adjusters are arranged on the same side for convenient operation and parameter adjustment, which is consistent with the overall design of the VDR series pump.
4. Application & Maintenance Notes
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Application Scope: Suitable for machine tools, injection molding machines, hydraulic presses and other general industrial hydraulic systems, meeting the variable flow and pressure demand of equipment, and perfectly matching the performance parameters of the VDR-2B-2A3-22 pump.
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Fluid Requirement: Compatible with mineral oil-based standard hydraulic fluids; do not use water-based fluids unless equipped with special seals to avoid damage to the pump and ensure the service life of the VDR-2B-2A3-22.
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Maintenance: Regularly replace the hydraulic filter and inspect the fluid cleanliness and viscosity to extend the service life of the pump; check the seal for leakage regularly, which is crucial for the stable operation of the VDR-2B-2A3-22 pump.
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