QT Series Medium Pressure Gear Pump Working

QT Series Medium Pressure Gear Pump

Features and Benefits

• Advanced Internal Gear Design: Employs a specialized tooth profile (rotor and idler gear configuration) that minimizes trapped oil volumes and ensures continuous, smooth engagement.

• Wide Operating Range: Capable of handling speeds spanning from low RPMs up to high rotational speeds without compromising pressure.

• Medium-to-High Pressure Capability: Standard medium-pressure models can comfortably operate in the range of 14 MPa to 25MPa, with robust versions handling up to 32 MPa.

• Forced Lubrication System: Friction surfaces are lubricated continuously by pressurized hydraulic fluid, virtually eliminating direct metal-to-metal contact. 

• Ultra-Low Noise Levels: The smooth gear-meshing geometry limits operational noise significantly, making them ideal for noise-sensitive industrial and laboratory environments.

• Negligible Pressure Pulsation: Eliminates pressure ripples (as low as 0.02 MPa), which ensures highly precise speed and pressure control.

• High Volumetric Efficiency: Internal sealing mechanics minimize internal leakage and energy loss, resulting in high mechanical efficiency.

• Exceptional Wear Resistance & Longevity: The forced lubrication mechanism prevents premature wear, allowing for an extended lifespan even when operating at higher pressures or withlower-viscosity fluids.

• Servo Compatibility: Their predictable output and low torque fluctuation make them a leading choice for modern servo-driven or variable-frequency drive (VFD) hydraulic systems, maximizing energy savings.

Model Codes

VG Series Gear Pump Installation Dimensions

gear pump.pdf

Applications

• Injection molding machines

• Hydraulic presses and die-casting equipment

• Precision machine tools

• Elevators and forging machinery

Packaging & Delivery

QT Series Medium 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 Medium Pressure Gear Pump FAQ

1. What is the working pressure range of QT series medium pressure gear pump?

The rated pressure is 6.3MPa, and the maximum working pressure can reach 8.0MPa, suitable for medium‑pressure hydraulic systems.

2. What is the maximum speed of QT gear pump?

The maximum speed ranges from 1500‑3000 r/min, varying with different displacement specifications.

3. What’s the main application of QT series gear pump?

It is widely used in engineering machinery, agricultural machinery, machine tools and other medium‑pressure hydraulic equipment for oil delivery and power transmission.

4. What types of hydraulic oil are suitable for this pump?

It is recommended to use anti‑wear hydraulic oil with viscosity of 32# or 46#, working temperature 0‑60℃.

5. How to solve oil leakage of QT gear pump?

Check oil seal, O‑ring and assembly bolts; replace damaged seals and fasten loose bolts evenly.

6. What are the advantages of QT internal gear pump compared with external gear pump?

Lower noise, higher volumetric efficiency, stable output flow and longer service life under medium‑pressure working conditions.

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 Medium 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.