VDC-11A(B)-2A3-2A*20/35 Nachi Double vane Pump
VDC Series:VDC-1A/B; VDC-2A/B; VDC-3A/B
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Nachi Double Vane Pump VDC-11A-2A3-2A*20/35 & VDC-11B-2A3-2A*20/35 Specifications
Model Interpretation
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VDC: Series name, representing Nachi high-pressure variable displacement vane pump, widely used in industrial high-pressure hydraulic systems.
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11: Double pump identifier, indicating that the product is a twin (double) vane pump, integrating two independent vane pump units to provide dual-path hydraulic output.
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A/B: Mounting method (A: Foot type mounting, sub plate type, sub plate not included; B: Flange mounting optional, suitable for different installation space and application scenarios).
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2: Pump size, indicating the basic structural size of each single vane pump unit in the double pump (matched with the VDC-2 series single pump size).
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A: Ring size, corresponding to the matching size of the pump ring, ensuring stable operation and pressure resistance of the pump.
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3: Pressure adjustment range, corresponding to the high-pressure regulation specification for the VDC-11 series double vane pump, suitable for medium and high-pressure hydraulic system requirements.
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2A: Flow characteristics, meaning dual constant discharge type, ensuring stable and consistent flow output of both two pump units, meeting the demand of dual-path synchronous or independent hydraulic power supply.
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*20/35: Design and matching code, 20 represents the basic design number of the pump, 35 represents the matching specification of the pressure control component, ensuring the pump’s pressure stability and control precision.
Detailed Technical Parameters
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Parameter Item
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Nachi VDC-11A-2A3-2A*20/35
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Nachi VDC-11B-2A3-2A*20/35
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Displacement per unit (in³/rev)
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2.1 (each pump unit)
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2.1 (each pump unit)
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Total Displacement (in³/rev)
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4.2 (two pump units combined)
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4.2 (two pump units combined)
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No-Load Discharge Rate (gpm) @ 1500 min⁻¹ (per unit)
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14.0
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14.0
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Total No-Load Discharge Rate (gpm) @ 1500 min⁻¹
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28.0
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28.0
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No-Load Discharge Rate (gpm) @ 1800 min⁻¹ (per unit)
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16.8
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16.8
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Total No-Load Discharge Rate (gpm) @ 1800 min⁻¹
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33.6
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33.6
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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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105
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108
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Weight (kg)
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47.6
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49.0
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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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Dual constant discharge type (each unit independent output)
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Dual constant discharge type (each unit independent output)
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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 (both units synchronous rotation)
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Right from shaft end (both units synchronous rotation)
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Material
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High-strength reinforced cast iron (enhanced for double pump pressure-bearing and wear resistance)
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High-strength reinforced cast iron (enhanced for double pump pressure-bearing and wear resistance)
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Pressure Control Precision
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±0.3MPa (excellent level), pressure fluctuation ≤0.1MPa
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±0.3MPa (excellent level), pressure fluctuation ≤0.1MPa
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Operation Noise (dB @ 1m)
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≤55dB, low noise design
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≤55dB, low noise design
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Key Features
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Dual-Path Hydraulic Output: Integrates two independent vane pump units, providing stable dual-path hydraulic power output that can be used synchronously or independently, meeting the demand of complex hydraulic systems for multi-path power supply, and saving installation space compared with two single pumps.
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High Pressure Stability: With allowable peak pressure up to 3000 psi (214.3 kgf/cm²) and pressure adjustment range of 290-1800 psi, equipped with high-precision pressure control components (matching code 35), pressure control precision reaches ±0.3MPa, pressure fluctuation ≤0.1MPa, ensuring stable pressure output of the system.
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Stable & Quiet Operation: Adopts 3-point ring support system and optimized structural design, combined with precision machining and noise reduction technology, operation noise is ≤55dB (1m distance), minimizing vibration and noise, suitable for precision machinery and indoor working scenarios.
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High Efficiency & Durability: Innovative mechanical design reduces power loss and improves overall system efficiency; high-strength reinforced cast iron material enhances pressure-bearing capacity and wear resistance, ensuring long service life even under long-term continuous operation of double pump units.
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Easy Installation & Maintenance: Compact integrated structure, foot/flange optional mounting methods, adapting to different installation spaces; pressure and flow adjustment mechanisms of the two pump units are concentrated on the same side, simplifying maintenance and handling, reducing equipment downtime.
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Strong Adaptability: Wide shaft speed range (800-1800 min⁻¹), suitable for different power matching requirements; dual constant discharge type design ensures stable flow output, adapting to various industrial hydraulic system scenarios.
Application Scope
Note
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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.
