QT Series Two-stage High Pressure Gear Pump Is A Positive Displacement Pump

QT Series Two-stage High Pressure Gear Pump

Features and Benefits

• High Working Pressure: Two‑stage supercharging structure, rated pressure up to 16‑21MPa, maximum pressure up to 25MPa, suitable for heavy‑load working scenarios.

• Stable Performance: Adopts internal gear meshing principle, small flow pulsation, stable oil supply, low vibration and long service life.

• Wide Displacement Range: Complete displacement specifications, covering 20–250ml/r, meeting different flow demand of customers.

• Strong Adaptability: Compatible with 32# / 46# anti‑wear hydraulic oil, suitable for construction machinery, mining equipment, metallurgical machinery and other heavy‑duty equipment.

• Compact Structure: Integrated two‑stage design, small overall size, easy installation and maintenance, strong anti‑pollution ability.

Model Codes

QT Series Two-stage High Pressure Gear Pump Installation Dimensions

gear pump.pdf

Applications

1. Construction Machinery  Excavators, loaders, road rollers, concrete pump trucks, aerial work platforms, pile drivers, etc.

2. Agricultural Machinery  Tractors, harvesters, irrigation equipment, agricultural spraying machines, grain transportation machinery.

3. Machine Tools & Industrial Equipment  CNC machine tools, hydraulic presses, injection molding machines, forging machinery, automatic production lines.

4. Mining & Metallurgical Machinery  Coal mining machinery, mine supporting equipment, metallurgical smelting equipment, heavy‑duty conveying machinery. 

5. Special Vehicles  Sanitation vehicles, fire trucks, garbage compactors, bulk material transport vehicles, marine auxiliary hydraulic systems. 

6. Other Hydraulic Systems  Hydraulic lifting platforms, material handling equipment, packaging machinery, environmental protection equipment.

Packaging & Delivery

QT Series Two-stage High Pressure Gear Pump 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.

QT Series Two-stage High Pressure Gear Pump FAQ

1.What is the pressure range of QT two‑stage high‑pressure gear pump?

Rated pressure: 16–21MPa; Max pressure: up to 25MPa.

3.What hydraulic oil should be used?

32# or 46# anti‑wear hydraulic oil, working temperature 0–60℃.

4.What are its main applications?

Construction machinery, mining equipment, metallurgical machinery, heavy‑duty machine tools and other high‑pressure hydraulic systems.

5.How to solve high noise during operation?

Check oil cleanliness, adjust installation levelness, and replace worn bearings or gear components.

6.What advantages does it have over single‑stage pumps?

7. What are the installation requirements for VVS pumps

Standard mounting: ISO 3019/2 or SAE flange

Rotation direction: right-hand (clockwise)

No radial or axial load should be applied to the shaft

Proper installation is critical for performance and durability.

8. What applications are VVS variable vane pumps commonly used in

They are widely used in:

CNC machine tools

Injection molding machines

Hydraulic power units

Industrial automation systems

Press machinery

Certifications & Quality Assurance

QT Series Two-stage High Pressure Gear Pump 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.

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%).

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.

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.

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.

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

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.

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.