Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of cbn-3 series lightweight single gear pump in China, also supports customized service. If you're going to wholesale high quality cbn-3 series lightweight single gear pump made in China, welcome to get pricelist from our factory.
Products Description
Product Definition
The CBN-3 series lightweight single gear pump is a high-performance, positive displacement hydraulic unit designed to efficiently convert mechanical rotational energy into pressurized fluid flow. As a lightweight alternative to heavier cast-iron designs, it serves as the core power source for hydraulic systems in small-scale industrial and mobile machinery where space and weight are critical factors.
Working Principle
The operation of the CBN-3 series lightweight single gear pump is based on the classic meshing gear principle. As the precision-ground driving and driven gears rotate within the housing, the teeth disengage on the suction side, creating a localized vacuum that draws hydraulic oil into the pump cavity. The oil is then trapped between the gear teeth and the pump body, transported around the periphery, and forced out under high pressure through the discharge port as the gears re-engage.
Core Structural Design
Integral Aluminum Alloy Pressure Casting: The pump body is made from a single-piece high-strength aluminum alloy casting. This design provides excellent rigidity while keeping the overall weight low, making it suitable for applications where both strength and lightweight construction are required.
Floating Bushing Thrust Compensation: The CBN-3 adopts a floating bushing structure to compensate for axial clearance during operation. As components wear over time, the system automatically adjusts the internal gap, helping to reduce leakage, maintain sealing performance, and ensure stable volumetric efficiency (≥90%) throughout the service life of the pump.
Precision Gear Profile: The gears are manufactured with high machining accuracy to achieve smooth engagement and stable oil flow. This helps reduce pressure pulsation and operating noise, making the pump suitable for hydraulic systems requiring reliable and consistent performance.
Features & Advantages
Remarkably Lightweight Design: The use of integral aluminum alloy casting reduces the net weight of the pump significantly (ranging from 3.0 kg to 6.2 kg depending on the model). This weight reduction is crucial for mobile equipment, helping to lower overall fuel consumption and improve the maneuverability of small excavators and tractors.
Consistent Efficiency: The floating bushing thrust compensation technology ensures that the pump maintains a stable volumetric efficiency of ≥ 90%. This minimizes energy waste and heat generation, keeping the hydraulic oil at optimal operating temperatures.
Dual Pressure Capability: The series offers two distinct pressure grades: E-grade for standard applications and F-grade for demanding tasks. This flexibility allows engineers to select the exact pressure rating required for their specific hydraulic circuit.
Rugged Reliability: The heavy-duty floating bushing design absorbs axial thrust forces generated by high pressure, protecting the drive shaft from stress and significantly extending the bearing service life.
Product Parameters
| Model | Displacement (mL/r) |
Rated Pressure E F |
Rated Speed (r/min) | Input Power (kW) | |
|---|---|---|---|---|---|
| CBN-E306 | 6 |
16 |
20 | 2000 | 3.95 |
| CBN-E308 | 8 | 16 | 20 | 2000 | 5.27 |
| CBN-E310 | 10 | 16 | 20 | 2000 | 6.58 |
| CBN-E312 | 12 | 16 | 20 | 2000 | 7.90 |
| CBN-E314 | 14 | 16 | 20 | 2000 | 9.22 |
| CBN-E316 | 16 | 16 | 20 | 2000 | 10.53 |
| CBN-E320 | 20 | 16 | 20 | 2000 | 13.17 |
| CBN-E325 | 25 | 16 | 20 | 2000 | 16.46 |
Displacement (6~25 mL/r): Select the displacement based on the required hydraulic cylinder speed. Lower displacements (6-10 mL/r) are ideal for precise, low-flow tasks like steering systems, while higher displacements (20-25 mL/r) suit fast-acting boom lifts.
Input Power (3.95~16.46 kW): This indicates the required engine/ motor horsepower needed to drive the pump under rated pressure. This direct metric simplifies the matching process with your prime mover.
Pressure Grade (E/F): The F-grade (20 MPa) models provide a 25% increase in working pressure compared to E-grade (16 MPa) models, making them suitable for equipment needing extra lifting or digging force.
Operating Environment:
Hydraulic Oil: 20 - 43 cSt (Standard mineral hydraulic oil, e.g., ISO VG 32/46).
Working Temp.: -20°C to 80°C.
Filtration Accuracy: ≤ 25 μm.
Volumetric Efficiency: ≥ 90%.
Application
Target Industries:
Small/Mini Construction Equipment: Mini-excavators, skid steer loaders, and small dumpers requiring dependable hydraulic power in tight spaces.
Agricultural Machinery: Small tractors, harvesters, and sprayers used in narrow-field operations.
Material Handling: Light-duty forklifts and small aerial work platforms.
Industrial Systems: Small hydraulic power units (HPUs) for machine tools and specialized automated equipment.
Typical Application Scenario:
In a Mini-Excavator: The CBN-3 pump drives the hydraulic system for the boom, arm, and bucket movements. Its lightweight aluminum construction reduces the overall machine weight, allowing the mini-excavator to operate on softer ground without sinking. The F-grade (20 MPa) option delivers the extra power needed when digging into hard soil or lifting heavy rubble.
Installation & Maintenance
Installation Guidelines:
Shaft Alignment: Use a flexible coupling to connect the pump shaft to the engine/motor. Misalignment is the leading cause of rapid bearing wear and shaft seal leakage.
Flange Mounting: Secure the pump flange to the bracket using the recommended torque for the 4 mounting bolts. Ensure the mounting surface is flat to prevent housing distortion.
Suction Line: The suction pipe must be rigid or wire-reinforced to avoid collapsing under vacuum. Keep it short and straight. Ensure the inlet pressure does not drop below -0.03 MPa to prevent cavitation.
Maintenance & Care:
Fluid Hygiene: Contaminated oil is the #1 enemy. Replace the hydraulic oil and return-line filters at regular intervals. Use fluids filtered to ≤ 25 μm.
Temperature Monitoring: Keep the oil temperature below 80°C. If the pump casing feels excessively hot, check the oil cooler or relief valve settings.
Seal Inspection: Check the drive shaft seal for any drips during daily pre-start inspections. Replace promptly if leakage is observed.
Our Support: We offer full technical support for installation and troubleshooting.
Our Heritage
Founded in 1988, our company has over 35 years of specialized experience in the design and manufacturing of hydraulic components. We are a high-tech enterprise affiliated with Hebei Wendefu Hydraulic Technology Co., Ltd., dedicated to delivering top-tier pressure valve components globally.
Production Capacity
We employ a professional team of over 200 people, including skilled engineers and production managers. Our annual production capacity allows us to ship over 10,000 containers of hydraulic products to more than 20 countries annually, including Russia, Europe, South America, and Southeast Asia.
Strict Quality Control (QC)
We implement a rigorous quality control system to ensure "reliable operation" for every delivered pump:
Material Verification: 100% inspection of incoming aluminum castings and steel gear blanks.
In-Process Dimensional Checks: CNC machining stations utilize advanced measurement tools to maintain precise tolerances.
Pre-Shipment Testing: A minimum of 10 inspection procedures are conducted before shipping, including:
Visual inspection of housing and shaft.
Dynamic performance testing on hydraulic benches to verify pressure, flow rate, and noise levels.
Certifications: Our manufacturing process is ISO9002 certified, ensuring international quality standards.
Services:
OEM & Customization: We accept custom shaft and port designs based on your specific drawings.
Fast Delivery: Stock items ship in 2-3 days; custom orders typically take 10-14 business days.
Secure Packaging: Export-grade plywood crates ensure safe global shipping via sea, air, or courier.
After-Sales Warranty: We provide a 12-month warranty against manufacturing defects from the B/L date.
FAQ
Q: What is the main difference between the CBN-3 and heavier cast-iron gear pumps?
A: The CBN-3 series is constructed from integral aluminum alloy pressure casting with a floating bushing thrust compensation design. This drastically reduces the pump's weight (up to 35% lighter in some applications) while maintaining high durability. It is specifically designed for compact machines where weight reduction and space efficiency are critical.
Q: What is the difference between the "E" and "F" pressure grades?
A: The "E" grade indicates a rated working pressure of 16 MPa, suitable for standard lifting and steering applications. The "F" grade provides a higher rated pressure of 20 MPa, offering more power reserve and capability for demanding operations like digging or heavy lifting. Choose the "F" series for equipment that frequently operates at maximum loads.
Q: What type of shaft connections and ports are available?
A: The CBN-3 series offers versatile connectivity. For the shaft, we support Plain Key Shafts, Rectangular Splines, and Screw Threads. For the oil ports, both Threaded and Flange types are available with various standard dimensions. Please consult our engineering team to confirm compatibility with your coupling and piping.
Q: Can I customize the pump for my specific OEM machine?
A: Absolutely. As a professional manufacturer, we offer full OEM (Original Equipment Manufacturer) and ODM (Original Design Manufacturer) services. If you have specific requirements for shaft length, port positioning, or pressure ratings, please provide your drawing or technical specifications, and we will manufacture the custom pump for you.
Q: How are the pumps tested before shipping?
A: Every CBN-3 series lightweight single gear pump undergoes a rigorous 100% performance test on our hydraulic test benches before leaving the factory. The test process includes checking the pressure output, flow rate stability, noise levels, and verifying that all seals are leak-free under rated load conditions. Test records are available for quality assurance upon request.
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