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PGH4
Green Hydraulic
PGH4
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
Product Description
Robust Cast Iron Construction:
The PGH4 is built with high-density cast iron housings and covers, providing maximum structural rigidity to withstand high continuous pressures. This rugged construction minimizes housing expansion and mechanical fatigue, ensuring stable performance and an extended service life in demanding industrial environments.
Advanced Internal Gear Design:
Utilizing a specialized internal meshing gear geometry, the PGH4 offers a significantly lower noise profile and reduced flow pulsation compared to external gear pumps. This design is inherently smoother, making it ideal for indoor factory settings and applications requiring high-precision fluid delivery.
Radial and Axial Gap Compensation:
Equipped with state-of-the-art gap compensation technology, the PGH4 uses pressure-balanced sealing elements to automatically optimize internal clearances. This minimizes internal leakage (bypass), ensuring exceptional volumetric efficiency even at low rotational speeds and high operating pressures.
Extreme High-Pressure Capability:
Engineered for the most rigorous industrial tasks, the PGH4 handles continuous operating pressures of up to 5,076 psi (350 bar). Its case-hardened steel gears and precision-ground components allow it to power heavy-duty actuators, such as those found in large presses and injection molding machines, with reliable flow.
Modular Versatility and System Integration:
The PGH4 series offers a wide range of displacements (from 20 to 50 cc/rev) and supports standard SAE or ISO mounting configurations. Its modular design allows it to be easily combined into multiple pump units (tandem or triple pumps), providing unmatched flexibility for complex, multi-circuit hydraulic system layouts.
| Size (cc/rev) | Displacement | Max. Continuous Pressure (bar) | Max. Speed (rpm) | Min. Speed (rpm) |
| 20 | 20.2 | 350 | 3000 | 600 |
| 25 | 25.4 | 350 | 3000 | 600 |
| 32 | 32.5 | 350 | 3000 | 600 |
| 40 | 40.5 | 350 | 3000 | 500 |
| 50 | 50.6 | 350 | 3000 | 500 |
Applications
Plastics Processing Machinery: A primary choice for injection molding machines and blow molding equipment, where the PGH4’s low pulsation and high-pressure capability ensure precise clamping and injection movements.
Metal Forming & Machine Tools: Optimized for hydraulic presses, bending machines, and punching units, where the robust gap-compensated design maintains stable flow and pressure during intensive, high-cycle production runs.
Industrial Power Units (HPUs): Widely used in centralized hydraulic systems for steel mills and power plants that require continuous-duty operation and minimal noise emissions in indoor factory environments.
General Automation & Testing: Ideal for hydraulic test stands and specialized automation cells, offering a high-precision flow source that facilitates accurate control of actuators and sensitive hydraulic components.
Lifting & Transport Engineering: Frequently employed in heavy-duty theater stage hydraulics, large elevators, and cargo handling systems, where its smooth operation and reliability are critical for safe and steady load positioning.
PGH4 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.
The PGH4 is a high-pressure, fixed-displacement internal gear pump and a premium component of Rexroth’s "Platform H" series. Engineered for heavy-duty industrial applications, it utilizes a gap-compensated design to provide exceptional volumetric efficiency and stable power output, even at low speeds and high pressures.
Ultra-Low Noise & Pulsation: The internal meshing design and specialized tooth geometry result in significantly lower noise levels and reduced flow ripples, which is critical for quiet industrial environments.
Higher Pressure Ratings: While aluminum pumps typically top out at 250 bar, the PGH4 is built for continuous operation at much higher pressures.
Gap Compensation Technology: It features radial and axial sealing gap compensation, ensuring that volumetric efficiency remains high throughout the pump's entire service life.
Continuous Pressure: Up to 5,076 PSI (350 bar).
Intermittent/Peak Pressure: Up to 6,000 PSI (420 bar) in certain configurations.
This extreme pressure rating makes the PGH4 ideal for injection molding machines, presses, and heavy-duty industrial power units.
Oil Type: Premium mineral-based (HLP) or synthetic (HEES) hydraulic fluids.
Viscosity: The optimal operating range is 20 to 100 cSt, though it can handle start-ups up to 2,000 cSt.
Filtration: Due to the tight internal clearances, cleanliness is paramount. A minimum filtration level of ISO 4406 19/17/14 is required to prevent abrasive wear on the sealing gaps.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
Please provide the following details:
Model or displacement
Working pressure
Speed
Quantity
We will reply within 12 hours with a competitive quotation.
PGH4 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.
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.
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.
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.
Of course we can. Just send me your logo we can make it for you.
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.
