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GHP1 GHP2 GHP3 Gear Drive Hydraulic Pump

Green Hydraulic GHP1 GPH2 GHP3 delivers steady displacement from 4.5 to 35.2 cc/rev, with 250 bar continuous pressure and 280 bar peak pressure.Compact, efficient and durable, it is widely used in construction, agricultural and material handling machinery.

Model:
GHP1 GHP2 GHP3
Brand:
Green Hydraulic
Model Number:
GHP1 GHP2 GHP3
Packaging Details:
Standard export carton/plywood case
Testing Before Shipment:
Yes
Cartification:
ISO9001，CE
Application:
1. Industrial Hydraulic Systems 2. Mobile Equipment (Industrial Vehicles) 3. Construction and Engineering Machinery 4. Metallurgy Industry
Shaft Type:
Key Shaft and Spline shaft
MOQ:
1 set


Availability:



Inquiry

Product Description

GHP2 SERIES Gear Pump Overview

The Green GHP2 is a high‑pressure, fixed‑displacement external gear pump engineered for demanding mobile and industrial hydraulic systems that require reliable performance, compact packaging, and long service life. Built for efficiency and durability, it is optimized for applications where space is limited and consistent high‑pressure output is critical.

GHP2

Features and Benefits

Rugged Construction for Heavy‑Duty Use:
The GHP1 GHP2 features a high‑strength aluminum alloy body with ductile iron flanges and covers, offering a high power‑to‑weight ratio while maintaining structural rigidity under continuous high‑pressure loads. This design minimizes deflection and fatigue, ensuring stable performance even in harsh working conditions.
High‑Efficiency Gear and Bearing Design:
Utilizing precision‑machined, hardened steel gears and advanced pressure‑balanced bearings, the GHP2 delivers high volumetric efficiency across its operating range. The design reduces wear and improves contamination tolerance, supporting reliable operation with minimal maintenance.
Optimized Pressure Capability:
Despite its compact footprint, the GHP2 is rated for continuous operating pressures up to 250 bar (3,625 psi) and peak pressures up to 280 bar (4,060 psi). This makes it suitable for powering high‑force actuators and complex hydraulic circuits in demanding applications.
Modular Versatility and Installation Flexibility:
The GHP2 series offers a wide range of displacements (from 4.5 to 35.2 cc/rev) and supports standard mounting configurations, making it easy to integrate into diverse system designs. Its compact form factor and multiple porting options provide unmatched flexibility for both mobile equipment and stationary industrial machinery.
Low Noise and Smooth Operation:
Precision‑balanced components and optimized gear profiles reduce noise and flow pulsation, resulting in quieter, smoother operation that improves overall system comfort and reliability.

Specifications

Model Codes

Technical Data

Parameter	Specification
Type	Fixed-displacement external gear pump
Displacement Range	4.5 – 35.2 cc/rev
Max Continuous Pressure	250 bar (3,625 psi)
Max Intermittent Pressure	280 bar (4,060 psi)
Max Peak Pressure	295 bar (4,280 psi)
Speed Range	500 – 4,000 rpm (varies by displacement)
Flow Rate (@ 1500 rpm)	6.4 – 50.2 L/min
Body Material	High-strength aluminum alloy
Flange/Cover Material	Ductile cast iron
Gear Material	Hardened steel
Fluid Viscosity Range	10 – 1000 cSt
Operating Temperature Range	-40°C to +80°C (rated performance: -10°C to +80°C)
Mounting Options	Standard SAE and European flanges
Porting Options	Side or rear ports (dual-port design available)
Efficiency	Up to 88% volumetric efficiency

GHP2 Hydraulic Gear Pump Installation Dimensions

Applications

Applications

The Marzocchi GHP2 series provides a compact, high‑pressure power solution tailored for mobile and industrial hydraulic systems where reliability, efficiency, and space‑saving design are critical.

Construction & Mobile Equipment:
Ideal for truck‑mounted cranes, aerial lifts, and compact excavators, where the pump’s high power‑to‑weight ratio and continuous 250 bar pressure capability deliver reliable lifting and positioning power in limited spaces.
Agricultural Machinery:
Commonly used in tractors, seeders, fertilizer spreaders, and hydraulic steering systems. Its robust design handles variable load shocks, fluid contamination, and outdoor operating conditions common in field environments.
Material Handling & Logistics:
Perfect for forklifts, pallet trucks, tail‑lift systems, and dock levelers. The GHP2 maintains high efficiency under heavy loads, ensuring consistent performance for lifting, lowering, and material movement operations.
Snow & Ice Control Systems:
Optimized for salt spreaders, plow attachments, and de‑icing equipment. Its durable construction and contamination‑tolerant design withstand corrosive environments and high‑frequency winter maintenance cycles.
Industrial Hydraulic Power Units:
Used in compact power packs, machine tools, and process equipment requiring steady, high‑pressure flow. The pump’s low noise and modular mounting options make it suitable for both stationary and semi‑mobile industrial applications.

Factory&FAQ

Packaging & Delivery

GHP2 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.

GHP2 Gear Pump FAQ

1. What are GHP2 series gear pumps

The GHP2 is a high‑pressure, fixed‑displacement external gear pump from Marzocchi’s GHP Series. Featuring a compact, high‑strength aluminum alloy body with ductile iron flanges and covers, it is specifically engineered for mobile and industrial hydraulic systems that demand high efficiency, reliable performance, and long service life under continuous high‑pressure operation.

2. What makes the GHP2 different from standard gear pumps

The GHP2 stands out in demanding applications where standard pumps may struggle:

High‑Pressure Aluminum Construction: Unlike many low‑cost pumps, its reinforced aluminum body with ductile iron end covers maintains structural rigidity under pressure, minimizing internal deflection for consistent efficiency.
Pressure‑Balanced Gear & Bearing Design: It utilizes precision‑machined, hardened steel gears and pressure‑balanced bearings, offering superior resistance to wear, fluid contamination, and thermal shock compared to basic gear pump designs.
Modular Versatility: The series offers a wide range of displacements, standard SAE mounting options, and multiple port configurations, providing greater installation flexibility than many fixed‑design pumps.

3. What is the working pressure range of GHP2 pumps

The GHP2 is a high‑pressure‑rated pump designed for heavy‑duty use. Depending on the specific model, it typically handles:

Continuous Pressure: Up to 250 bar (3,625 PSI).
Intermittent/Peak Pressure: Up to 280 bar (4,060 PSI).

This robust pressure rating makes the GHP2 ideal for powering high‑force actuators and complex hydraulic circuits in construction, agricultural, and material handling machinery.

4. Can GHP2 pumps replace other brands

Yes, the GHP2 is a high‑quality, drop‑in compatible alternative to many premium gear pumps. It is often used as a replacement or upgrade for pumps from other manufacturers with similar mounting standards.

To ensure a successful swap, verify the Mounting Flange, Shaft Type (e.g., spline, keyed), Port Configuration, and Displacement (cc/rev) to match your existing system’s requirements.

5. What hydraulic oil is suitable for GHP2 gear pumps

To protect the precision‑machined gears and bearings, the following is recommended:

Oil Type: Premium mineral‑based hydraulic fluids with strong Anti‑Wear (AW) and anti‑oxidation additive packages.
Viscosity: Standard ISO VG32 to VG68. The optimal operating range is 20 to 46 cSt, though it can handle cold starts with higher viscosities (up to 430 cSt) for brief periods.
Filtration: Cleanliness is vital for pump life. A minimum filtration level of ISO 4406 18/16/13 is recommended to prevent abrasive particles from damaging gear and bearing surfaces.

6. What is the typical speed range of GHP2 pumps

The typical operating speed range for GHP2 pumps is 500 to 4,000 RPM, depending on the specific displacement and model. Operating outside this range may reduce efficiency or shorten service life.

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

GHP2 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.

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.

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.

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.