CBT-E5 Series Hydraulic Gear Pump | CBT-E520 CBT-E540 CBT-E563 CBT-E580 | External High Pressure Pump

The CBT-E5 Series external gear pumps from Chengyuan Hydraulic are high-efficiency power components specifically designed for industrial hydraulic systems, forklifts, and compact construction machinery. This series utilizes a high-strength die-cast aluminum alloy housing and a DU composite bearing support system, providing an exceptional power-to-weight ratio. For models ranging from CBT-E520 to CBT-E580, we implement advanced axial clearance automatic compensation technology to ensure peak volumetric efficiency under continuous high pressure. Every CBT-E5 pump undergoes 100% simulated condition testing to strictly verify pressure pulsation and internal leakage, guaranteeing 100% original-place interchangeability with OEM equipment.

Technical Specifications:

• Core Models: CBT-E520, CBT-E525, CBT-E532, CBT-E540, CBT-E550, CBT-E563, CBT-E580

• Displacement Range: 20 cm³/rev to 80 cm³/rev

• Nominal Pressure: 20 MPa (200 bar)

• Maximum Pressure: 25 MPa (250 bar)

• Max Speed: 2000 – 3000 rpm (depending on displacement)

• Volumetric Efficiency: ≥ 93%

• Input Shaft Types: Parallel key, rectangular spline, or SAE spline available

• Mounting Flange: SAE standard 2-bolt or 4-bolt flange

• Working Medium: Mineral-based hydraulic oil

Key Technical Advantages:

• Axial Clearance Automatic Compensation: The internal floating bushing design utilizes hydraulic feedback to press the bushing against the gear end-faces. This compensation mechanism effectively minimizes internal leakage at high pressures, maintaining high efficiency throughout the pump’s lifespan.

• High-Strength Extruded Aluminum Housing: The housing is die-cast from aerospace-grade aluminum alloy and heat-treated for superior fatigue resistance. Even under 25 MPa peak pressure spikes, the body maintains structural integrity, preventing internal seizure.

• DU Bearing Support System: Equipped with high-performance composite DU bearings, offering extreme load-carrying capacity and wear resistance. Combined with ultra-precision ground gear journals, it significantly reduces friction, suppresses operational noise, and extends service life.

• Modular Connection Flexibility: The CBT-E5 series offers multiple port configurations (side-in/side-out, rear-in/side-out) and shaft options, allowing seamless replacement for legacy equipment without manifold modifications.

Application Areas:

• Material Handling: Main lift pumps for forklifts and steering systems for reach trucks.

• Agricultural Machinery: Hydraulic output for combine harvesters and tractors.

• Environmental Equipment: Hydraulic circuits for garbage compactors and road sweepers.

Expert Maintenance Tips:

• Fluid Cleanliness Standards: To protect high-precision components, maintain hydraulic fluid cleanliness at ISO 4406 19/16 or better. Particulates cause side-plate erosion, leading to significant pressure loss.

• Rotation Direction Verification: Always check the rotation direction (CW or CCW) against the nameplate before installation. Incorrect rotation will result in immediate shaft seal failure.

• Pre-Startup Lubrication: Before the initial startup, fill the suction port with clean hydraulic oil and manually rotate the drive shaft to ensure the gears are fully lubricated for the first run.