HPLPA Series Internal Gear Pump | High Pressure Gear Pump Replacement

Genlu Hydraulic proudly introduces our HPLPA Series high-pressure internal gear pumps, engineered for industrial-grade high-pressure hydraulic systems renowned for superior flow-pulsation control and pressure handling. The HPLPA series comprehensively covers the HPLPA114, HPLPA131, HPLPA148, HPLPA180, and HPLPA214 range, ensuring perfect compatibility for complex configurations such as HPLPA214DMNE5E3B00. Genlu unequivocally guarantees 100% Drop-in Interchangeability in mounting flanges, shaft specifications, port dimensions, and pressure characteristics. Backed by our uncompromising 100% Simulation Load Testing, each unit is validated for volumetric efficiency, dynamic seal durability, and noise performance before dispatch, ensuring relentless, stable, and quiet power delivery for your critical engineering or industrial applications.

Technical Specifications 

• Product Series: HPLPA Series High-Pressure Internal Gear Pump

• Available Models: HPLPA114, HPLPA131, HPLPA148, HPLPA180, HPLPA214

• Representative Model: HPLPA214DMNE5E3B00

• Rated Operating Pressure: 250 – 300 bar (Model-dependent)

• Peak Pressure: Up to 320 bar

• Speed Range: 400 – 3000 rpm

• Structural Configuration: Axial & radial pressure-compensated internal gear design

• Fluid Compatibility: Hydraulic oils, lubricating oils, etc.

Key Technical Advantages:

• Pressure-Compensation Technology: Utilizes industry-leading pressure-compensated side plates that automatically adjust axial clearances during operation. This ensures peak volumetric efficiency even at extreme pressures, drastically reducing internal leakage and enhancing overall energy conversion efficiency.

• Whisper-Quiet Operation: The smooth mesh of the internal gears ensures a uniform fluid suction and discharge process. Compared to standard external gear pumps, the HPLPA series generates minimal pressure pulsation, resulting in lower noise levels and reduced vibration fatigue in hydraulic lines.

• High-Pressure Wear-Resistance: Core gear components are manufactured from high-strength alloy steel, subjected to specialized heat treatment and precision gear-profile modification. This provides exceptional surface hardness and wear resistance, maintaining precision and longevity even under frequent high/low-pressure cycling.

• Compact Modular Design: The internal gear architecture inherently provides high power-density, allowing for versatile multi-pump combinations. Its compact geometric footprint facilitates easy integration into space-constrained equipment, such as machine tool power units.

Application Areas:

• High-Precision Machine Tools: Main drive and auxiliary servo systems for CNC machining centers.

• Injection Molding Machinery: Power circuits for high-pressure mold clamping and injection.

• Heavy-Duty Hydraulic Stations: Power units for steel/metallurgical equipment and industrial presses.

• Mobile Construction Machinery: Power systems for load-sensing hydraulic controls.

Expert Maintenance Tips:

• Cold Start Protocol: If the operating environment is cold, use VFD control or low-pressure idling to pre-heat the hydraulic oil to the appropriate viscosity before applying full load. This prevents instantaneous wear on the gear set caused by high-viscosity oil during start-up.

• Fluid Cleanliness Standards: Given the precision clearances of the HPLPA series, a 10μm (or finer) system filter is mandatory. Maintain fluid cleanliness within ISO 4406 18/16/13 standards at all times.

• Alignment Precision: The drive shaft must be free of side-loads. When installing couplings, ensure the radial misalignment between the motor shaft and the pump shaft is within 0.05mm to prevent eccentric wear, which can cause catastrophic damage to the internal gear assembly.