QT32-12.5 /QT32-16/QT42-20 Gear pump
QT31,QT32,QT33 series Gear pump; QT41,QT42,QT43 series Gear pump;
QT51,QT52,QT53 series Gear pump;QT61,QT62,QT63 series Gear pump;
Parameter Specification of Sumitomo QT Series Gear Pump (QT32-12.5 / QT32-16 / QT42-20)
1. Model Interpretation
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QT: Series identifier, representing Sumitomo QT series fixed displacement gear pump, featuring simple structure, strong pollution resistance and low maintenance cost;
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32/42: Frame size code, indicating the overall structural size and installation dimension of the pump. QT32 and QT42 series have different flange and shaft end dimensions to adapt to different installation scenarios;
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12.5/16/20: Geometric displacement code, representing the theoretical displacement of the pump per revolution, with the unit of cm³/rev, which is the core parameter determining the output flow of the pump.
2. Core Technical Parameters
|
Parameter Name
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QT32-12.5
|
QT32-16
|
QT42-20
|
Unit
|
|
Pump Type
|
Fixed Displacement Gear Pump
|
Fixed Displacement Gear Pump
|
Fixed Displacement Gear Pump
|
–
|
|
Geometric Displacement
|
12.5
|
16.0
|
20.0
|
cm³/rev
|
|
Rated Operating Pressure
|
20
|
20
|
25
|
MPa (2900 / 3625 psi)
|
|
Maximum Pressure
|
25
|
25
|
30
|
MPa (3625 / 4350 psi)
|
|
Rated Speed
|
1800
|
1800
|
1800
|
r/min
|
|
Maximum Speed
|
3000
|
3000
|
2800
|
r/min
|
|
Recommended Oil Viscosity
|
20 – 68
|
20 – 68
|
20 – 68
|
cSt (ISO VG 32/46/68, 40℃)
|
|
Material
|
Cast Iron
|
Cast Iron
|
Cast Iron
|
–
|
3. Performance Parameters
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Volumetric Efficiency: ≥ 92% (under rated speed and pressure, with ISO VG 46 oil at 40℃), which is in line with the standard level of industrial gear pumps);
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Overall Efficiency: ≥ 85% (under rated working conditions), featuring excellent energy-saving performance in medium and low pressure hydraulic systems;
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Flow Characteristics: The output flow is proportional to the rotating speed, with stable flow output and small pressure fluctuation, suitable for occasions requiring constant flow supply;
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Noise Level: ≤ 75 dB(A) (at 1800 r/min, no-load condition), with low operating noise and good environmental adaptability.
4. Installation & Working Conditions
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Mounting Type: Flange Mounting, consistent with the standard installation dimensions of Sumitomo QT series, easy to assemble and disassemble;
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Rotation Direction: Clockwise (standard configuration) when viewed from the shaft end; counterclockwise rotation can be customized according to user requirements;
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Working Temperature: -10℃ ~ 70℃ (ambient temperature), and the oil temperature is recommended to be controlled within 25℃ ~ 55℃ for long-term stable operation to extend the service life of the pump;
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Oil Cleanliness: NAS 9 class or higher, which can effectively reduce the wear of internal gear and bearing components and ensure the reliability of the pump;
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Application Scope: Suitable for industrial machinery, construction machinery, agricultural machinery, hydraulic stations, and other equipment that require stable medium and low pressure hydraulic power supply.
5. Other Specifications
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Drive Method: Mechanical drive, which needs to be matched with the corresponding motor power according to the actual working pressure and flow requirements;
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Weight: QT32-12.5 / QT32-16: Approximately 18 kg; QT42-20: Approximately 25 kg (depending on specific configuration);
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Design Standard: Complies with Sumitomo’s internal gear pump technical standards, with mature structure and long service life, and strong interchangeability of accessories;
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Maintenance: Regular oil change and filter replacement are recommended (oil change cycle is 2000 working hours), and wear parts are compatible with original Sumitomo accessories to ensure maintenance convenience.
Sumitomo Gear pump QT32-12.5 , QT32-16 , QT42-20 , QT42-25 , QT42-31.5
Sumitomo Gear pump QT52-50 , QT52-63 , QT62-80 , QT62-100 , QT62-125 , QT31-20 , QT31-25
Sumitomo Gear pump QT31-31.5 , QT41-40 , QT41-50 , QT41-63 , QT51-80 , QT51-100 , QT51-125
Sumitomo Gear pump QT61-160 , QT61-200 , QT61-250 , QT33-12.5 , QT33-16 , QT43-20
Sumitomo Gear pump QT43-25 , QT43-31.5 , QT53-40 , QT53-50 , QT53-63 , QT63-80
Sumitomo Gear pump QT63-100 , QT63-125 , QT52-40
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.
