VDC-3A-1A4, VDC-3B-1A4 Vane pump
VDC Series:VDC-1A/B; VDC-2A/B; VDC-3A/B
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Nachi Vane Pump VDC-3A-1A4 & VDC-3B-1A4 Specifications
Model Interpretation
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VDC: Series name, representing Nachi high-pressure variable displacement vane pump.
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3: Pump size, indicating the basic structural size of the pump (larger than the VDC-2 series).
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A/B: Mounting method (A: Foot type mounting; B: Flange mounting optional).
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1: Ring size, corresponding to the matching size of the pump ring.
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A: Flow characteristics, meaning constant discharge type for stable flow output.
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4: Pressure adjustment range, corresponding to the ultra-high pressure regulation specification for the VDC-3 series (higher than the “3” suffix model, with larger pressure range and higher peak pressure).
Detailed Technical Parameters
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Parameter Item
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Nachi VDC-3A-1A4
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Nachi VDC-3B-1A4
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Displacement (in³/rev)
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3.1
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3.1
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No-Load Discharge Rate (gpm) @ 1500 min⁻¹
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20.6
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20.6
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No-Load Discharge Rate (gpm) @ 1800 min⁻¹
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24.7
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24.7
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Pressure Adjustment Range (psi)
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290 – 1800
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290 – 1800
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Pressure Adjustment Range (kgf/cm²)
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20.4 – 128.6
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20.4 – 128.6
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Allowable Peak Pressure (psi)
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3000
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3000
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Allowable Peak Pressure (kgf/cm²)
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214.3
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214.3
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Shaft Speed Range (min⁻¹)
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800 – 1800
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800 – 1800
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Weight (lbs)
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70
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70
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Weight (kg)
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31.8
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31.8
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Mounting Method
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Foot type mounting (Sub plate type, sub plate not included)
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Flange mounting optional
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Flow Characteristics
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Constant discharge type
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Constant discharge type
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Design Number
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20
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20
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Rotation Direction
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Right from shaft end
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Right from shaft end
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Material
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High-strength cast iron (reinforced for ultra-high pressure resistance)
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High-strength cast iron (reinforced for ultra-high pressure resistance)
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Key Features
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Ultra-High Pressure Performance: Withstand peak pressure up to 3000 psi (214.3 kgf/cm²), and adjustable pressure range of 290-1800 psi, suitable for ultra-high pressure hydraulic systems requiring stable and continuous pressure output.
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Stable Operation: Adopts 3-point ring support system and upgraded pressure control mechanism, ensuring stable discharge rate even in ultra-high pressure range, effectively reducing pressure fluctuations and ensuring system stability.
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Low Vibration & Noise: Advanced structural optimization and noise reduction design minimize vibration and noise, providing a quiet operation environment, suitable for precision machinery, indoor equipment and high-demand working scenarios.
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Easy Maintenance: Pressure and discharge rate adjusting mechanisms are located on the same side, simplifying maintenance and handling, reducing equipment downtime and improving work efficiency.
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High Efficiency & Durability: Innovative mechanical design reduces power loss, improving overall system efficiency and energy saving; high-strength reinforced cast iron material enhances wear resistance and pressure resistance, ensuring long service life under ultra-high pressure working conditions.
Application Scope
Note
VDC series Nachi vane pump
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Process steps：
Customer inquiry: Customers will make inquiries before placing an order to understand product details and communication needs.
Quotation: According to customer needs, provide a formal quotation, including the name, model, quantity, delivery time, payment method, etc. of the goods.
Order confirmation: After the customer confirms the quotation, a formal purchase order will be placed.
Confirm the delivery time: communicate the delivery time with the production department, inform the factory of the order details, and arrange the production plan.
Sign an export contract: After the two parties confirm that it is correct, sign an export contract to establish a trade relationship.
Implement the letter of credit (if applicable): If the payment method of the letter of credit is used, the customer needs to be urged to issue the certificate and review the contents of the letter of credit.
Export stocking: According to the requirements of the contract and the letter of credit, arrange production, purchase raw materials and packaging, and prepare the goods.
Chartering and booking: Contact the freight forwarder to make a booking and arrange the transportation of goods.
Export inspection: Apply to the quality inspection department for export commodity inspection and provide relevant documents.
Apply for a write-off slip: apply for a write-off slip from the foreign exchange management department for subsequent foreign exchange write-off.
Export declaration: Declare exports to the customs and provide documents such as power of attorney for customs declaration, customs declaration form for export goods, commercial invoice, packing list, etc.
