Duplomatic Gear Pump Series Overview
[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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I. Classification of Core Duplomatic Gear Pump Series
1. External Gear Pumps (Standard & High Pressure)
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Series
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Features
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Displacement Range
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Pressure Rating
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Typical Applications
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GP Series
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Aluminum alloy external gear pump, axial clearance compensation, low noise, high efficiency, three frame sizes
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1.3–87.6 cm³/rev
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Standard 230 bar, High version up to 310 bar
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General industrial machinery, automation equipment, auxiliary hydraulic circuits
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GPA Series
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Enhanced high-pressure external gear pump, reinforced structure, improved sealing system
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Up to 61 cm³/rev
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Max 260 bar continuous pressure
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High-precision machine tools, heavy-duty automated production lines
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GPM Series
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Modular multi-section external gear pump, flexible combined flow, compact layout
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Custom combined displacement
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Rated 210–230 bar
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Multi-circuit hydraulic systems, customized industrial equipment
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2. Internal Gear Pumps (Low Noise, Ultra-High Pressure)
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Series
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Features
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Displacement Range
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Pressure Rating
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Typical Applications
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IGP Series
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Precision internal gear pump, radial & axial pressure compensation, ultra-low noise, long service life
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10–251.7 cm³/rev
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Standard 250 bar, peak up to 330 bar
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High-end machine tools, servo hydraulic systems, precision automation, injection molding machines
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IGP-H Series
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High-pressure upgraded version of IGP series, optimized bearing and sealing structure
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16–160 cm³/rev
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Peak pressure 310 bar, stable high-load operation
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Heavy industrial high-pressure circuits, die-casting and molding equipment
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II. Complete List of 30 Typical Models (Classified by Series)
1. GP Standard External Gear Pump Series
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GP1-1.3R10N – Ultra-small displacement pump, precision lubrication and auxiliary circuits
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GP1-9.1L10N – Max displacement of GP1 frame, compact general-purpose pump
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GP2-7.0R11N – Small flow standard pump for light industrial equipment
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GP2-27.9L11N – Medium flow GP2 frame universal hydraulic pump
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GP3-20.7R12N – GP3 large frame entry-level displacement model
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GP3-51.4L12N – Medium-large flow pump for general industrial hydraulics
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GP3-87.6R12N – Maximum displacement of GP series, high-flow supply
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GP2-16.0R11H – High-pressure version, suitable for intermittent heavy load
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GP1-4.5L10H – Small high-pressure pump for compact high-pressure circuits
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GP3-32.0R12H – High-efficiency high-pressure standard industrial pump
2. GPA High-Pressure External Gear Pump Series
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GPA10-10R – 10 cm³/rev high-precision high-pressure pump
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GPA20-25L – 25 cm³/rev medium-flow enhanced pressure pump
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GPA30-40R – 40 cm³/rev heavy-duty GPA series pump
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GPA30-61L – Max displacement GPA model for high-flow high-pressure systems
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GPA20-16R – Compact high-stability pump for machine tool hydraulic circuits
3. GPM Multi-Combination Gear Pump Series
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GPM20-16/10R – Double combined pump, dual-flow synchronous supply
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GPM30-32/16L – Large & medium flow combined multi-circuit pump
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GPM20-20/08R – Main & auxiliary dual pump for compound hydraulic systems
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GPM30-50/25L – High-flow double modular combination pump
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GPM10-09/04R – Small dual pump for compact multi-circuit equipment
4. IGP Precision Internal Gear Pump Series
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IGP3-10R15N – Small displacement low-noise precision pump
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IGP4-25L15N – Medium flow standard internal gear pump
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IGP5-40R15N – Universal high-efficiency industrial IGP pump
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IGP6-80L15N – Medium-large flow high-stability pump
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IGP7-160R15N – Large displacement mainstream industrial model
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IGP7-250L15N – Maximum displacement high-flow internal gear pump
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IGP4-16R15H – IGP high-pressure upgraded version
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IGP5-32L15H – High-pressure low-noise servo dedicated pump
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IGP6-63R15H – Heavy-load high-pressure precision pump
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IGP7-125L15H – Large flow high-pressure molding equipment dedicated pump
III. Model Naming Convention
IV. Selection Guidelines
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Pressure Selection: Standard GP series suits 210–230 bar medium-pressure working conditions; GP-H/GPA high-pressure versions adapt to 260–310 bar heavy-load scenarios; IGP internal gear pumps support up to 330 bar peak pressure for ultra-high-precision systems.
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Noise & Stability Requirements: IGP internal gear pumps feature meshing gap compensation and low pulsation, ideal for silent machine tools, servo hydraulics and high-end automation equipment; GP external pumps are cost-effective for conventional general industrial scenarios.
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Flow Combination Demand: GPM multi-section combined pumps can match different front and rear stage displacements, meeting simultaneous high and low flow demands of multi-circuit hydraulic systems and optimizing system layout.
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Working Medium & Environment: All series support standard mineral hydraulic oil; optional special seals are available for low-temperature, high-temperature and anti-corrosion working environments, with strong environmental adaptability.
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Cost Performance: GP series is preferred for ordinary auxiliary circuits and general power circuits; IGP series is recommended for core precision hydraulic circuits requiring low noise and high stability; GPA/GP-H are selected for long-term high-pressure continuous operation.
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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.
