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KP20 Tandem Gear Pumps

The KP20 Series Gear Pump is a high-performance external gear pump widely used in industrial and mobile hydraulic systems. It is characterized by its robust construction, high volumetric efficiency, and low noise levels. Designed for durability under high pressure, the KP20 is commonly applied in construction machinery, agricultural equipment, and power units where reliable fluid power is essential.
  • KP20

  • Green Hydraulic

  • KP20

  • Standard export carton/plywood case

  • Yes

  • ISO9001,CE

  • • Industrial • Energy • Government (Non Aerospace) • HVAC • Mobile • Natural Resources • Transportation (Non Aerospace)

  • 1. Industrial Hydraulic Systems 2. Mobile Equipment (Industrial Vehicles) 3. Construction and Engineering Machinery 4. Metallurgy Industry

  • Key Shaft and Spline shaft

  • 1 set

Availability:
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Product Description

KP20 Gear Pump  Overview

The KP20 is a high-performance, fixed-displacement external gear pump designed for modern hydraulic systems that require high efficiency and reliability. Featuring a high-strength aluminum alloy body with cast iron end covers, the KP20 is engineered to provide an exceptional power-to-weight ratio. Its compact and robust design makes it a versatile solution for a wide range of mobile and industrial applications, especially where high operating pressures and consistent performance are paramount.

Features and Benefits

  • High-Strength Aluminum Alloy Construction:
    The KP20 features a body extruded from high-strength aluminum alloy, complemented by heavy-duty cast iron covers. This combination ensures superior structural integrity and heat dissipation while minimizing overall weight, making it ideal for mobile equipment.

  • Exceptional Volumetric Efficiency:
    Utilizing precision-machined gears and high-performance pressure-balanced bushings, the KP20 achieves outstanding volumetric efficiency. This design reduces internal leakage and ensures consistent flow delivery even under high-pressure conditions and varying oil temperatures.

  • Optimized Low-Noise Performance:
    The gear tooth profile is specifically engineered to reduce vibration and noise levels during operation. The high-precision manufacturing process ensures smooth meshing, which extends the service life of the pump and provides a quieter working environment.

  • Robust High-Pressure Capability:
    The KP20 is built to handle continuous operating pressures of up to 250 bar (3,625 psi), with peak pressures reaching even higher. Its reinforced internal components allow it to power demanding hydraulic circuits with stability and precision.

  • Modular Versatility and Installation Flexibility:
    The KP20 series offers a wide range of displacements (from 14 to 31.5 cc/rev) and supports multiple standardized mounting options, including SAE and European flanges. Available with various shaft styles and both side and rear porting configurations, it integrates seamlessly into diverse system layouts.

Model Codes

KP20(1)

Technical Data

Pump Type (Model)      Displacement  Max Continuous Pressure  (bar/psi) Max Peak Pressure  (bar/psi) Max Speed (min⁻⊃1;) Min Speed (min⁻⊃1;)
KP 20.4 4.95 285 / 4133 330 / 4785 4000 350
KP 20.6.3 6.61 285 / 4133 330 / 4785 4000 350
KP 20.8 8.26 285 / 4133 330 / 4785 3500 350
KP 20.11.2 11.23 275 / 3988 320 / 4640 3500 350
KP 20.14 14.53 265 / 3843 320 / 4640 3500 350
KP 20.16 16.85 260 / 3770 320 / 4640 3000 300
KP 20.20 21.14 210 / 3045 250 / 3625 3000 300
KP 20.25 26.42 180 / 2610 220 / 3190 2500 300
KP 20.31.5 33.03 140 / 2030 180 / 2610 2000 300

KP20 Hydraulic Gear Pump Installation Dimensions

KP20(2)

Applications

The KP20 series provides a versatile, high-pressure hydraulic solution specifically engineered for mobile and industrial applications where high power density, reliability, and compact design are essential:
  • Construction & Earthmoving Machinery: A reliable choice for mini-excavators, skid steer loaders, and small backhoes. The KP20’s high-strength body and pressure-balanced design provide the consistent force needed for demanding digging and lifting cycles.

  • Material Handling Equipment: Extensively used in forklifts, reach trucks, and warehouse automation systems. Its high volumetric efficiency ensures smooth, precision control for lifting heavy loads while maintaining low noise levels in indoor environments.

  • Refuse & Waste Management: Ideal for medium-duty garbage compactors, bin lifters, and recycling trucks. The KP20 handles high-cycle operations and peak pressure spikes with ease, ensuring long-term durability in grueling waste collection schedules.

  • Agricultural & Forestry Machinery: Frequently employed in tractors, harvesters, and log splitters. The pump is designed to withstand the harsh environments, variable load shocks, and fluid contamination often encountered in field and forest operations.

  • Transport & Mobile Hydraulics: Perfectly suited for truck-mounted cranes, tail lifts, and car transporters. Its excellent power-to-weight ratio and flexible mounting options allow for easy integration into modern truck chassis where space is limited.

Vane Pump Application



Packaging & Delivery

Shipping Methods

KP20 pumps are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the pump from environmental damage.

Custom Crates: For larger, heavier pumps, ensuring safe handling.

Documentation: Includes installation, maintenance instructions, and warranty details.

Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.


KP20 Gear Pump  FAQ

1. What are KP20 gear pumps

The KP20 is a high-efficiency, fixed-displacement external gear pump. It is a core component for modern hydraulic systems, featuring a high-strength aluminum alloy body with cast iron end covers. It is specifically engineered to provide a high power-to-weight ratio in compact mobile and industrial applications.

2. What makes the KP20 stand out among high-pressure gear pumps

The KP20 is built for high-cycle reliability and efficiency:
  • Superior Efficiency: Equipped with pressure-balanced bushings and high-precision gears, it maintains high volumetric efficiency even at high operating temperatures.

  • Low Noise Operation: The optimized gear tooth profile and precision manufacturing minimize vibration and noise, making it suitable for noise-sensitive environments.

  • Exceptional Durability: The use of specialized wear-resistant materials and heavy-duty DU bushings ensures a long service life under continuous high-pressure conditions.

3. What is the working pressure range of KP20 pumps

The KP20 is a robust high-pressure pump. Depending on the displacement, the series typically handles:
  • Continuous Pressure: Up to 3,625 PSI (250 bar).

  • Intermittent/Peak Pressure: Up to 4,060 PSI (280 bar).
    This high pressure rating makes the KP20 ideal for demanding tasks in construction and material handling equipment.

4. Can KP20 pumps replace other brands

Yes, the KP20 is a high-quality alternative and often used as a replacement or upgrade for leading European and American brands (such as Casappa, Marzocchi, or Galtech). To ensure a successful swap, please verify:
  • Mounting Flange: Standard SAE (A or B) or European 4-bolt patterns.

  • Shaft Type: Splined, Tapered, or Straight keyed shafts.

  • Displacement: Matching the cc/rev or gear width of your existing pump.

5. What hydraulic oil is suitable for KP20 gear pumps

To protect the high-precision internal components, we recommend:
  • Oil Type: High-quality mineral-based hydraulic fluids with Anti-Wear (AW) additives.

  • Viscosity: Standard ISO VG32 to VG68. The optimal operating viscosity range is 20 to 100 cSt.

  • Filtration: Cleanliness is critical. A minimum filtration of ISO 4406 19/17/14 is recommended to prevent premature wear.

6. What is the typical speed range of KP20 pumps

The KP20 series typically operates between  500 RPM and 3,000 RPM, depending on the displacement and system pressure.

7. Do you provide OEM or customized services

Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.

8. How can I get a quotation quickly

Please provide the following details:

  • Model or displacement

  • Working pressure

  • Speed

  • Quantity
    We will reply within 12 hours with a competitive quotation.


Certifications & Quality Assurance

KP20 pumps are manufactured in compliance with international standards, ensuring high performance and reliability:

ISO 9001: Certified for quality management systems.

CE Certification: Ensures compliance with European safety, health, and environmental protection standards.

RoHS Compliance: Ensures the pump does not contain hazardous materials.

Factory Testing: Every pump is rigorously tested for performance, pressure, and leak integrity before shipping.



Green Hydraulic Patent Certificate

FAQ

1.How does the variable displacement work?

The pump's flow is adjusted by changing the angle of an internal swash plate. As the swash plate angle changes, the stroke length of the pistons varies, which in turn changes the volume of fluid displaced per rotation, allowing the flow rate to adapt to the system's needs.


2.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.


3.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.


4.Can you make my own brand on the products?

Of course we can. Just send me your logo  we can make it for you.


5.What is our main export market?

America(40.5%):USA, Canada, Argentina, Brazil

Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).


Unedited footage of the Green Hydraulic Factory

The Green hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.

Unedited footage of the Green Hydraulic Factory

The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.

Unedited footage of the Green Hydraulic Factory

Green Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.

Unedited footage of the Green Hydraulic Factory3

All hydraulic pumps produced by Green Hydraulic have undergone compliance testing, ensuring their quality and reliability.

Unedited footage of the Green Hydraulic Factory4

To meet the diverse needs of different industries, the green hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.

Unedited footage of the Green Hydraulic Factory5

Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.


Green Hydraulic Advantages
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