CBH Series Low Noise Gear Pump | CBHZ-F30/F32/F36-ALH | CBHC CBHZB CBHZA

LIC Hydraulic specializes in the CBH Series, a premium range of external gear pumps specifically engineered for low-noise hydraulic applications. The series, encompassing CBHC-F, CBHZ-F, CBHZB-F, and CBHZA-F, is the preferred choice for material handling equipment where operator comfort and quiet operation are paramount. Featuring flagship models like CBHZ-F30-ALH and CBHZ-F32-ALH, this series utilizes high-precision gear grinding and pressure-balanced floating bushings to achieve exceptional volumetric efficiency at pressures up to $25\text{ MPa}$ ($3625\text{ PSI}$).

Technical Specifications (Bulleted List)

• Series: CBH / CBHZ (High Pressure, Low Noise Series).

• Displacement Range: $20\text{ cc/rev}$ to $40\text{ cc/rev}$ (Standard: 30, 32, 36).

• Pressure Rating: Nominal $20\text{ MPa}$, Peak up to $25\text{ MPa}$.

• Speed Range: Rated $2000\text{–}2500\text{ RPM}$, Max up to $3000\text{ RPM}$.

• Efficiency: Volumetric efficiency $\ge 93\%$ at rated conditions.

• Mounting: SAE and specialized forklift-standard flange options.

Key Technical Advantages

• Advanced Noise Reduction: The specialized “low-pulsation” gear profile minimizes fluid-borne vibration, making it ideal for indoor warehouse environments.

• Robust Aluminum Housing: Constructed from premium-grade aluminum alloy, the pump offers high thermal conductivity and excellent resistance to structural fatigue under high-pressure cycles.

• Axial Clearance Compensation: Floating bushings automatically adjust to maintain the optimal seal between the gears and side plates, ensuring stable performance across the entire temperature range.

• Drive Shaft Versatility: Available in multiple spline and keyed configurations to match engines and electric motors from major global manufacturers.

Application Areas

• Material Handling: Main hydraulic pump for electric and internal combustion forklifts.

• Municipal Engineering: Quiet power source for street sweepers and waste collection vehicles.

• Warehouse Automation: Powering hydraulic lift tables and automated docking systems.

Expert Maintenance Tips

• Check Filtration: To preserve the precision gear surfaces, maintain an oil cleanliness of $ISO\text{ 19/17/14}$. A contaminated system will quickly erode the “low noise” benefits of the CBHZ series.

• Rotation Verification: Always verify the rotation direction (Clockwise vs. Counter-clockwise) before installation. Operating a gear pump in the wrong direction will blow the shaft seal immediately.

• Fluid Selection: Use a high-quality anti-wear hydraulic oil (AW46 or AW68). Low-quality oils with poor air-release properties can lead to cavitation noise, negating the pump’s quiet design.