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VDR-2B-1A4-22 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-1A4-22: Model Explanation & Technical Parameters
1. Model Code Explanation
|
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.
|
|
1A4
|
Control Type & Displacement Grade
|
1A4 indicates the pressure compensation control type, which can automatically adjust the displacement according to the system pressure. It corresponds to a specific displacement grade, with a no-load displacement of approximately 24 cm³/rev.
|
|
22
|
Design & Seal Type
|
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
|
Notes
|
|---|---|---|---|
|
Displacement (No-load)
|
24
|
cm³/rev
|
Nominal no-load displacement under standard conditions
|
|
Max Working Pressure
|
14
|
MPa (2030 psi)
|
Stable and efficient operation range for long-term use
|
|
Allowable Peak Pressure
|
16
|
MPa (2320 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
|
30
|
ℓ/min
|
Measured at the standard speed of 1500 r/min
|
|
Flow Range
|
0–30
|
ℓ/min
|
Variable volume adjustment, adjustable according to system demand
|
|
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.
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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.
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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.
-
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.
4. Application & Maintenance Notes
-
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.
-
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.
-
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.
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