VDR-1B-1A3-22 NACHI Variable Volume Vane Pump
VDR Series: VDR-1A、VDR-2A、VDR-1B、VDR-2B
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Parameters of NACHI Variable Displacement Vane Pump VDR-1B-1A3-22
1. Basic Information
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Model: VDR-1B-1A3-22
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Product Type: Variable Displacement Single Vane Pump
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Series: VDR 22 Design Series
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Mounting Method: Flange Type Mount (Code “B”)
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Design Number: 22 (Note: The change from design number 21 to 22 represents a change in the shaft key width from 0.125 in to 0.187 in)
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Pump/Head Side Size: 1
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Ring/Head Ring Size: 1
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Flow Characteristics: Constant Discharge Rate Type (Code “A”)
2. Technical Parameters
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Parameter
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Value
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Unit
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|---|---|---|
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Displacement
|
16.7
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cc/rev
|
|
No-Load Discharge Flow (1800 min⁻¹)
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30 (7.9)
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L/min (gpm)
|
|
No-Load Discharge Flow (1500 min⁻¹)
|
25 (6.6)
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L/min (gpm)
|
|
No-Load Discharge Flow (1200 min⁻¹)
|
20 (5.3)
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L/min (gpm)
|
|
No-Load Discharge Flow (1000 min⁻¹)
|
16.7
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L/min
|
|
Pressure Adjustment Range
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3.0 – 10.5 (30.6 – 107; 435 – 1522)
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MPa (kgf/cm²; psi)
|
|
Allowable Peak Pressure
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14.0 (143; 2030)
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MPa (kgf/cm²; psi)
|
|
Rotational Speed Range
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800 – 1800
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min⁻¹
|
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Weight (Foot Mounting Type)
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9.2 (20.3)
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kg (lb) (Flange Mounting Type)
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3. Performance Characteristics
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Stable and highly efficient operation up to 10.5 MPa (1522 psi), with a biased piston that minimizes ring vibration and leak-free pressure balance construction for reliable medium-high pressure performance。
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High-precision instantaneous response, improved by a special bias piston mechanism that ensures prompt response at both on-off and off-on operations, enabling stable and accurate work[3]。
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Silent operation even in the medium-high pressure range, thanks to quiet journal bearings, a 3-point support system from the bias piston, and optimized suction/discharge port shapes that reduce operational noise significantly。
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Reduced power loss, especially at full cutoff, achieved through NACHI original mechanical innovations and precision machining techniques[2]。
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Solid and durable construction, made with high-quality materials and exquisite craftsmanship, suitable for harsh operating conditions and ensuring long service life[3]。
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Compact structure that facilitates easy installation and daily maintenance, adapting to various industrial hydraulic system configurations。
4. Notes
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When the ring size is Code “2”, the maximum setting pressure is 7 MPa (71.4 kgf/cm²; 1015 psi)。
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The discharge rate provided is the no-load value measured at 1800 min⁻¹。
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When using a 0.125 in key coupling, additional accessories are required due to the shaft key width change of design number 22。
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Under full cutoff continuous operation, the oil temperature limit is room temperature +25°C (with the tank in a well-ventilated area)。
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The pump is specifically designed for reliable performance in various industrial hydraulic systems, ensuring stable operation under different working conditions。
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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.
