Product Overview
The CBN-F316, CBN-F540-BFPL, CBN-E316, as well as CBK, CBT, CBN, and GPM series gear pumps originate from the mature medium-high pressure external gear pump platform. The CBN Series gear pumps are power components in hydraulic systems, featuring high-precision gears, high-strength aluminum alloy housings, floating bushings, and DU bushings that deliver simple structure, light weight, high efficiency, and low noise – widely used in construction machinery, agricultural machinery, material handling equipment, and mining machinery.
The CBN-F540-BFPL belongs to the CBN-F5 series medium-high pressure gear pumps with a cast iron housing, suitable for higher-load construction machinery applications. The GPM Series are medium-low pressure gear pumps with displacements of 40–500 mL/r, widely used in gearbox lubrication and clutch power systems.
Key Interchangeability Advantage: Our CBN/CBT/CBK/GPM series gear pumps are manufactured to strict original design specifications, ensuring 100% direct interchangeability with original units. All mounting interfaces, flange dimensions, shaft configurations, and port positions are identical to the original product – no modifications required. Every pump undergoes 100% factory performance testing under simulated operating conditions (covering rated pressure, peak pressure, and full speed range performance curves), guaranteeing plug-and-play reliability with zero performance deviation.
Model Code Breakdown (based on CBN Series designation rules):
CBN = Series: Medium-High Pressure External Gear Pump
E / F / G = Pressure Grade (E: 16 MPa, F: 20 MPa, G: 25 MPa)
316 / 540 / 50 = Displacement code (e.g., 316 = 16 mL/r, 540 = 40 mL/r, 50 = 50 mL/r)
Technical Specifications
CBN Series – General Specifications
Product Series: CBN Series Medium-High Pressure External Gear Pump
Pump Type: External involute gear pump
Pressure Grades: E (16 MPa) / F (20 MPa) / G (25 MPa)
Gear Material: High-precision gears
Housing Material: High-strength aluminum alloy (CBN-E/F series) / Cast iron (CBN-F5 series)
Bearings: Floating bushings + DU bushings
Recommended Fluid: Mineral hydraulic oil
Operating Temperature Range: -20°C to +80°C
Recommended Viscosity: 16–36 cSt
CBN-F316
CBN-F540-BFPL
Series: CBN-F5 Series Medium-High Pressure Gear Pump
Displacement: 40 mL/r
Rated Pressure: 20 MPa
Maximum Pressure: 25 MPa
Speed Range: 1000–4000 r/min
Volumetric Efficiency: ≥ 90%
Mounting Type: Flange mounting, extended shaft (BFPL)
Housing Material: Cast iron
Motor Power Range: 7.5–11 kW
CBN-E316
Displacement: 16 mL/r
Rated Pressure: 16 MPa
Maximum Pressure: 20 MPa
Rated Speed: 2000 r/min
Maximum Speed: 3000 r/min
Volumetric Efficiency: ≥ 95%
Overall Efficiency: ≥ 85%
CBN-F50-BFHL
Series: CBN-F5 Series Medium-High Pressure Gear Pump
Displacement: 50 mL/r
Rated Pressure: 20 MPa
Maximum Pressure: 25 MPa
Speed Range: 1000–4000 r/min
Mounting Type: Flange mounting, extended splined shaft (BFHL)
CBT-E316
CBK1016
GPM Series
Key Technical Advantages
1. High-Precision Gears with DU Bushings for High Efficiency and Long Service Life
The CBN Series features high-precision gears, floating bushings, and DU bushings (self-lubricating composite bearings). DU bushings offer excellent self-lubricating properties and wear resistance; combined with floating bushing automatic compensation, internal leakage is effectively minimized, volumetric efficiency is significantly improved (≥ 90–95%), and service life is extended.
2. Axial Clearance Automatic Compensation for High Efficiency Across All Conditions
The CBN Series features axial clearance automatic compensation, enabling the pump to maintain high efficiency over long-term operation. The pressure-balanced design ensures automatic clearance adjustment between gear faces and housing under all operating conditions, effectively minimizing internal leakage and maintaining stable flow output.
3. High-Strength Aluminum/Cast Iron Housing – Lightweight with High Strength
CBN-E/F Series feature high-strength aluminum alloy housings, delivering weight reduction while maintaining structural integrity. CBN-F5 Series (e.g., CBN-F540-BFPL) feature cast iron housings for higher-load construction machinery applications. Two material options are available for flexible matching to different operating conditions.
4. Wide Displacement Coverage and Flexible Configuration
The CBN Series offers displacements from 4 to 63 mL/r. Multiple mounting types (BFP/BFPL/BFH/BFHL), rotation directions (left-hand/right-hand), and shaft types (straight/splined/extended) are available. The CBT Series offers a wide speed range of 600–4000 r/min, adaptable to various power drive requirements.
Application Areas
Construction Equipment: Excavators, wheel loaders, bulldozer hydraulic systems
Agricultural Machinery: Tractors, combine harvesters, agricultural implement hydraulic systems
Material Handling Equipment: Forklifts, crane and material handling equipment hydraulic systems
Mining Machinery: Mining equipment hydraulic systems
Industrial Hydraulic Systems: Machine tools, presses, light industrial machinery hydraulic power units
Gearbox Lubrication: GPM Series for gearbox lubrication and clutch power systems
Expert Maintenance Tips
1. Model Confirmation and Selection
Complete CBN series model should include: Series (CBN) + Pressure Grade (E/F/G) + Displacement Code (e.g., 316/540/50) + Mounting Suffix (BFPL/BFHL, etc.) .
E Series rated pressure: 16 MPa; F Series rated pressure: 20 MPa; G Series rated pressure: 25 MPa.
CBN-F540-BFPL displacement: 40 mL/r; CBN-F50-BFHL displacement: 50 mL/r. Verify system flow requirements during selection.
2. Pre-Installation Checks
CBN Series pumps have a fixed rotation direction (typically clockwise, verify by nameplate) – verify matches system drive direction before installation.
Pump shaft and drive shaft concentricity deviation must be less than 0.1 mm to avoid radial or axial forces on the pump shaft.
Flange mounting bolts must be tightened diagonally in sequence.
Never use hammer-driven installation – always use proper tools.
3. First Start-Up & Oil Priming
Prime the pump housing with clean hydraulic oil before first start-up for pre-lubrication.
Jog the pump several times to purge air before continuous operation.
Never operate without oil or with insufficient oil – this will instantly damage the pump.
Maintain operating temperature within -20°C to +80°C.
4. Filtration & Fluid Cleanliness
Fluid contamination should be controlled within NAS Class 9 or better.
Regularly inspect and replace filters to maintain fluid cleanliness.
Monitor oil temperature – avoid prolonged operation above 80°C.
5. Operating Monitoring
Operating pressure must not exceed rated pressure; instantaneous peak pressure must not exceed maximum pressure.
Monitor pump operating sound – abnormal noise or vibration is often a precursor to failure.
Regularly check pump mounting bolts and connecting piping for looseness.
