HPLPA211SMNG6G4BHY High Pressure Gear Pump | HPLPA148 HPLPA180 | Cast Iron Hydraulic Pump

LIC Hydraulic proudly presents the HPLPA Series High-Pressure Gear Pumps, specifically designed for power-dense mobile and industrial applications. The HPLPA211SMNG6G4BHY model represents a pinnacle in gear pump engineering, offering a robust solution for systems demanding pressures up to 28 MPa. Our HPLPA series is engineered for 100% drop-in interchangeability, providing a reliable and cost-effective alternative to Tier-1 original brands. Every unit undergoes 100% full-duty cycle testing in our state-of-the-art facility to guarantee exceptional volumetric efficiency and silent operation under maximum load.

Technical Specifications (Focus on HPLPA211)

• Model Number: HPLPA211SMNG6G4BHY

• Displacement: 11.0 $cm^3/r$ (Available range: 14, 31, 48, 80 mL/r)

• Rated Operating Pressure: 25 MPa (250 bar)

• Peak Pressure Capability: 28 MPa (280 bar)

• Rated Speed Range: 2000 – 2500 RPM

• Minimum Speed: 500 RPM

• Volumetric Efficiency: ≥ 93%

• Mounting & Shaft: Standard 4-bolt flange (G4B) / Splined shaft (SM) as per code.

Key Technical Advantages

• Axial Gap Compensation: Features floating thrust plates that automatically adjust based on operating pressure. This maximizes volumetric efficiency and maintains high performance even as the pump ages.

• High-Tensile Body Construction: The three-piece housing is forged from high-grade materials to prevent body flexing under extreme pressure spikes, ensuring structural integrity during heavy-duty cycles.

• Premium DU Bearings: Equipped with high-performance DU composite bushings that offer superior load-carrying capacity and self-lubrication, extending service life in high-temperature environments.

• Precision-Engineered Gears: Hardened and ground gear teeth provide a perfect mesh profile, which significantly reduces hydraulic ripple and noise while enhancing resistance to particulate contamination.

Application Areas

• Commercial Vehicles: Hydraulic power for refuse trucks, dump truck hoists, and recovery vehicles.

• Lifting Equipment: Auxiliary power for truck-mounted cranes and aerial work platforms.

• Industrial Power Units: Compact hydraulic presses, waste balers, and lifting tables.

Expert Maintenance Tips

• Verify Rotation: HPLPA pumps are rotation-specific (CW or CCW). Always check the direction arrow on the pump tag before installation; reversing the rotation will cause immediate shaft seal failure.

• Pre-Lubrication Protocol: Prior to the first start, fill the pump with clean hydraulic fluid through the suction port. Manually rotate the shaft several times to ensure the internal friction pairs are lubricated.

• Cavitation Prevention: Gear pumps are highly susceptible to damage from aeration. Ensure the suction line is airtight and the inlet filter is clean. If a high-pitched metallic noise occurs, stop the machine immediately to check for air ingress.

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