KZP4/KRP4 Series Gear Pump High Pressure Hydraulic Gear Pumps

KZP4/KRP4 Series Gear Pump

Features and Benefits

• High‑pressure Resistance: Rated pressure up to 21MPa, maximum working pressure reaches 25MPa, stable performance under long‑time heavy‑load operation.

• Durable & Long Service Life: Reinforced bearing structure and high‑wear‑resistant gears, greatly improving service life under continuous working conditions.

• Compact & High Efficiency: Small overall size, high volumetric efficiency, low energy consumption, easy installation and maintenance.

• Low Noise & Stable Flow: Optimized gear profile design reduces meshing impact, low operating noise, steady flow output.

• Strong Environmental Adaptability: Good tolerance for contaminated hydraulic oil, suitable for construction sites, mining yards and other complex working environments.

• Complete Displacement Specifications: Multiple displacement options, compatible with various standard installation dimensions, easy model replacement.

Model Codes

VG Series Gear Pump Installation Dimensions

gear pump.pdf

Applications

• Forklift & Material‑handling Equipment: Electric/diesel forklifts, stackers, pallet trucks

• Construction Machinery: Mini excavators, road rollers, aerial work platforms

• Mining & Heavy‑duty Machinery: Mine hydraulic systems, heavy‑duty conveying equipment

• Industrial Hydraulic Systems: Hydraulic presses, injection molding machines, automated production lines

• Special Vehicles: Sanitation vehicles, small engineering vehicles, agricultural machinery

Packaging & Delivery

KZP4/KRP4 Series 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.

KZP4/KRP4 Series Gear Pump FAQ

1. What is the pressure range of KZP4/KRP4 gear pump?

Rated pressure: 21MPa; Max pressure: 25MPa.

2.What is the maximum rotating speed?

1800‑3200 r/min, varies by displacement models.

3.What hydraulic oil is recommended?

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

4.What is the displacement range?

Covers 20‑80 ml/r, standard KZP4/KRP4 series specifications.

5.How to solve pump oil leakage?

Check oil seals, O‑rings and mounting bolts; replace damaged seals and fasten bolts evenly.

6.What is the difference between KZP4 and KRP4?

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

KZP4/KRP4 Series 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.