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PGZ4
Green Hydraulic
PGZ4
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
The Rexroth PGZ4 is a compact, fixed-displacement gerotor/annular gear pump engineered for low-pressure hydraulic systems that demand reliable lubrication, cooling, and auxiliary flow. Featuring a lightweight yet robust construction, the PGZ4 is specifically designed to deliver consistent performance with minimal noise and pulsation, making it an ideal choice for direct mounting in machine tools, gearboxes, and mobile equipment where space is constrained and dependable operation is essential.
Compact Lightweight Aluminum Housing:
The PGZ4 is built with a high-strength aluminum body and cast iron covers, offering an excellent power-to-weight ratio compared to larger pump designs. This construction ensures rigidity while minimizing weight, making it easy to integrate into space-limited systems without sacrificing structural integrity.
Specifications
| Parameter | Value |
| Pump Type | Fixed-displacement gerotor (annular gear) pump |
| Series | PGZ4 (Size 4, Series 1X) |
| Primary Application | Low-pressure lubrication, cooling, filtration, auxiliary hydraulic circuits |
| Construction | Aluminum housing, cast iron covers, steel gerotor gears, slide bearings |
| Mounting | Standard ISO 2-hole flange (80A2HW, compatible with SAE-A) |
Applications
Applications
Factory&FAQ
PGZ4 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.
Gerotor/Annular Gear Design: Unlike standard external gear pumps, the PGZ4 uses an internal/external rotor design. This results in exceptionally low flow pulsation and noise, reducing system vibration and wear.
Compact, Lightweight Construction: Its aluminum body provides a superior power-to-weight ratio compared to cast iron pumps, making it ideal for space-constrained applications like gearboxes and machine tools.
High Self-Priming Capability: The gerotor design creates strong suction, ensuring reliable operation even in low-inlet-pressure lubrication circuits.
Continuous Pressure: Up to 15 bar (217 PSI).
Intermittent/Peak Pressure: Up to 20 bar (290 PSI).
This pressure rating makes the PGZ4 ideal for gearbox lubrication, machine tool oil circulation, and hydraulic system pre-charge circuits.
Rexroth PGZ and similar series
Other gerotor pumps with ISO 2-hole mounting flanges (80A2HW)
To ensure a successful swap, verify the Mounting Flange, Shaft Type (e.g., spline profile), and Displacement (cc/rev) to match your existing system.
Oil Type: Standard mineral-based hydraulic oils (HLP, HLPD, HVLP) with anti-wear and anti-foam additives.
Viscosity: The optimal operating range is 20–50 cSt (at 40°C). It can handle viscosities from 10 to 2000 cSt for start-up and varying conditions.
Filtration: Cleanliness is vital for pump life. A minimum filtration level of ISO 4406 21/18/15 is recommended to prevent contamination.
Minimum Speed: 600 rpm (to ensure adequate lubrication).
Recommended Operating Speed: 1000–2000 rpm (for optimal efficiency and noise performance).
Maximum Speed: 3000 rpm (absolute maximum).
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.
PGZ4 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.
