CBKA Series Hydraulic Gear Pump | CBKA-F1.6 CBKA-F2 CBKA-F4.2 | High Pressure

The CBKA Series axial-compensated high-pressure gear pumps from Chengyuan Hydraulic are the essential power source for miniature hydraulic systems. This series is specifically engineered for Hydraulic Power Units (HPU), forklift auxiliary systems, and lift platforms. Featuring a high-strength aluminum alloy housing and floating sleeve structure, the CBKA series delivers exceptional performance under 25MPa conditions. As a premier micro-pump from Chengyuan, every unit (including CBKA-F1.6, CBKA-F4.2) undergoes 100% simulated condition testing to ensure that flow characteristics and mechanical interfaces match original specifications, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Core Model Codes: CBKA-F1.2, CBKA-F1.6, CBKA-F2.1, CBKA-F3.2, CBKA-F4.2

• Displacement Range: 1.2 mL/r to 4.2 mL/r

• Nominal Pressure: 25 MPa (250 bar)

• Peak Pressure: 28 MPa (280 bar)

• Rated Speed: 2000 – 2500 rpm

• Minimum Speed: 600 rpm

• Rotation: Clockwise (R) / Counter-clockwise (L) available

• Mounting: F (Diamond or Square Flange options)

• Shaft Type: A (Tang), P (Keyed), or Splined options

Key Technical Advantages:

• Automatic Axial Pressure Compensation: Utilizes a floating side plate mechanism that leverages hydraulic feedback to adjust axial clearances. This ensures a volumetric efficiency exceeding 90% even at constant 25MPa pressure, reducing energy loss and heat generation.

• High-Strength Monoblock Aluminum Body: Extruded from specialized high-density aluminum alloy, providing excellent pressure resistance and heat dissipation. The CBKA series significantly reduces the weight of mobile machinery compared to cast iron alternatives.

• High-Load DU Sliding Bearings: Equipped with premium DU bearings lubricated by a high-pressure oil film. This construction ensures long service life and minimal mechanical friction under high speed and radial loads.

• Precision-Ground Gear Sets: Gears are precision-hobbed and ground with a surface hardness exceeding HRC 60. This enhances fatigue strength and ensures ultra-low noise operation (below 65 dB).

Application Areas:

• Hydraulic Power Units (HPU): Tailgates, electric pallet trucks, and scissor lift tables.

• Small Construction Machinery: Mini excavators, small dozers, and auxiliary circuits for agricultural machinery.

• Industrial Automation: Clamping devices and machine tool lubrication systems.

Expert Maintenance Tips:

• Pre-Lubrication: Before the initial startup or after maintenance, fill the suction port with clean hydraulic oil and manually rotate the shaft to prevent dry-run damage to the floating sleeves.

• Suction Filtration: Due to the high precision of the CBKA series, system filtration must be better than 25μm. Ensure the suction line is perfectly airtight to prevent cavitation caused by air ingress.

• Temperature Monitoring: Maintain oil temperatures between 30-50°C. Exceeding 80°C will accelerate seal aging and cause a sharp decline in volumetric efficiency.