Sumitomo Gear Pump Series Catalog
[Gear pump]: Rexroth gear pump | Parker gear pump | Nachi gear pump | Marzocchi gear pump | Sumitomo gear pump | Danfoss gear pump | Salami gear pump | Vivoil gear pump | Casappa gear pump | Caproni gear pump | Bucher gear pump | Hesper gear pump | Hydac gear pump | Roquet gear pump | Bondioli gear pump | Jihostroj gear pump | Duplomatic gear pump | Metaris gear pump | Atos gear pump | Kracht gear pump | Brevini gear pump | Ronzio gear pump | Commercial gear pump
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1. Core Product Series Overview
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Series
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Primary Application
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Key Features
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QT Series
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General industrial hydraulic systems
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Basic internal gear pump, multiple pressure ratings, wide displacement range
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QS Series
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Servo systems & precision control
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Enhanced for servo applications, low pulsation, improved pressure holding
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QTNS/QTN Series
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Advanced servo systems
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Optimized for servo motors, high efficiency, low noise
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QSG Series
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Special purpose applications
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Customized designs for specific industrial needs
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CQT Series
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Compact hydraulic systems
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Space-saving design, high power density
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2. QT Series: Standard Internal Gear Pumps (Core Product Line)
2.1 Model Nomenclature (Example: QT62-80F-SV-Z)
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Code
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Meaning
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QT
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Series identifier (Internal Gear Pump)
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6
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Size specification (2-8, larger number = larger displacement)
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2
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Pressure rating: 1=Low pressure (7 MPa/1000 psi) 2=Medium pressure (14 MPa/2000 psi) 3=High pressure (25 MPa/3600 psi)
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80
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Displacement (cc/rev)
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F
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Mounting/port configuration
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SV
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Optional features (e.g., pressure relief valve)
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Z
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Shaft type
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2.2 Technical Specifications
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Parameter
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Value Range
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Notes
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Displacement
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1.6–250 cc/rev
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Single pump: 1.6–125 cc/rev; Double pump: up to 250 cc/rev
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Pressure Ratings
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– Low (QT*1): 7 MPa (1000 psi) rated, 10 MPa max – Medium (QT*2): 14 MPa (2000 psi) rated, 17.5 MPa max – High (QT*3): 25 MPa (3600 psi) rated, 31.4 MPa max
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Maximum Speed
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1800–3600 rpm
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Dependent on size and pressure rating
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Efficiency
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>90% (volumetric)
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High efficiency due to precision gear design
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Noise Level
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55–75 dB(A)
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Significantly lower than external gear pumps
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Fluid Compatibility
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Mineral oil, synthetic hydraulic fluids
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Viscosity range: 10–400 cSt
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2.3 Common Models & Displacements
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Size Code
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Displacement Options (cc/rev)
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QT2*
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4, 6.3, 8, 10
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QT3*
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12.5, 16, 20, 25
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QT4*
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31.5, 40, 50
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QT5*
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63, 80
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QT6*
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100, 125
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QT7*
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160, 200
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QT8*
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250
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3. QS Series: Servo-Specific Internal Gear Pumps
3.1 Key Features
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Enhanced pressure holding performance for servo system stability
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Ultra-low pulsation (≤±1% pressure variation) for precise control
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Higher response speed for dynamic servo applications
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Compact, lightweight design for space-constrained installations
3.2 Technical Specifications
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Parameter
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Value Range
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Pressure Rating
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28 MPa (4060 psi) rated, 31.4 MPa max
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Displacement
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4–125 cc/rev
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Maximum Speed
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3000 rpm
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Pulsation Level
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≤±1% (at rated pressure)
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Temperature Range
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-10°C to +80°C
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4. QTNS/QTN Series: Advanced Servo Gear Pumps
4.1 Key Features
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Optimized for servo motor coupling with special mounting options
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Higher operating efficiency (up to 95% total efficiency)
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Lower starting torque for energy-saving servo systems
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Reduced heat generation for extended system life
4.2 Technical Specifications
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Parameter
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Value Range
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Pressure Rating
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21 MPa (3045 psi) rated, 25 MPa max
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Displacement
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4–100 cc/rev
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Maximum Speed
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3600 rpm
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Noise Level
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50–70 dB(A)
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Servo Response Time
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<50 ms
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5. QSG Series: Special Purpose Gear Pumps
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High-temperature environments (up to 120°C)
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Low-temperature operations (down to -40°C)
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Food-grade fluid handling (stainless steel construction)
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Chemical compatibility with aggressive fluids
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Pressure range: 7–25 MPa
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Displacement: 4–100 cc/rev
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Material options: Cast iron, aluminum alloy, stainless steel
6. Double Pump Configurations
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Parameter
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Value
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Combination Options
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Same or different displacements (e.g., QT42-31.5+QT52-63)
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Max Pressure
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Up to 31.4 MPa (for high-pressure models)
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Applications
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Injection molding machines, machine tools, mobile hydraulics
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7. Performance Advantages of Sumitomo Gear Pumps
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Internal Gear Design: Minimizes wear with no direct metal-to-metal contact between gears
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Forced Lubrication System: All sliding surfaces are lubricated by internal oil flow, extending component life
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Low Noise Operation: Specially designed gear geometry reduces noise by 10–15 dB compared to conventional gear pumps
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High Contamination Tolerance: Robust design handles up to 25 μm particle contamination (with proper filtration)
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Long Service Life: Typical MTBF (Mean Time Between Failures) exceeds 10,000 hours in industrial applications
8. Typical Applications
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Industrial Machinery: Injection molding machines, die-casting machines, machine tools
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Servo Systems: Electric injection molding machines, precision positioning systems
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Mobile Hydraulics: Construction equipment, agricultural machinery, material handling systems
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Specialty Applications: Marine systems, offshore equipment, renewable energy systems
Important Notes
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Installation: Follow Sumitomo’s recommended mounting and alignment procedures for optimal performance
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Maintenance: Regular oil analysis and filter replacement are essential for long service life
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Fluid Selection: Use only recommended hydraulic fluids within the specified viscosity range
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Specific details please refer to the official product catalog and technical documentation for the most accurate and up-to-date information
Sumitomo Gear Pump Series Catalog
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.
