HPLPA/HPLPB Series High-Pressure Gear Pump | Parker Replacement

Genlu Hydraulic proudly presents the HPLPA and HPLPB Series high-pressure external gear pumps, meticulously engineered as efficient power units for demanding mobile machinery and precision industrial hydraulic systems. This series is a precise match for Parker’s high-performance specifications, with a comprehensive model matrix covering HPLPA205, HPLPA206, HPLPA207, HPLPA208, HPLPA211, and HPLPA214, while fully supporting custom engineering configurations such as HPLPA214SMNG6G4B00. Genlu unequivocally guarantees 100% Drop-in Interchangeability in mounting flanges, drive shafts, port configurations, and geometric displacements with original equipment manufacturers. Backed by our uncompromising 100% Simulation Load Testing, every unit undergoes rigorous validation for volumetric efficiency, load pulsation, and continuous durability at high-pressure thresholds, ensuring relentless, stable, and high-performance fluid delivery for your hydraulic circuits.

Technical Specifications 

• Product Series: HPLPA (Standard) / HPLPB (High-Pressure Heavy-Duty)

• Displacement Range: 5.0 cc/rev to 14.0 cc/rev (Models HPLPA205 to HPLPA214)

• Rated Continuous Pressure: 250 bar (3625 psi)

• Max Intermittent Peak Pressure: 280 bar (4060 psi)

• Speed Range: 500 rpm to 3000 rpm

• Housing Construction: High-tensile extruded aluminum alloy body with heavy-duty cast iron end covers

• Rotation: Configurable as Clockwise (CW) or Counter-clockwise (CCW)

• Port Connections: SAE flange or threaded connections; side/rear or side/side porting

• Drive Type: Standard SAE splined or parallel keyed shaft

Key Technical Advantages:

• Pressure-Balanced Floating Side Plates: Internally equipped with precision-machined bronze-alloy floating bushings. By routing system pressure to the rear of the bushings, axial clearances are dynamically compensated in real-time, sustaining >92% volumetric efficiency even under high-pressure operation.

• Superior Thermal Dissipation: The pump body is crafted from specialized extruded aluminum profiles, which not only reduce overall weight but also impart exceptional thermal conductivity, effectively preventing efficiency degradation during prolonged heavy-load operations.

• Reinforced Heavy-Duty Bearing System: Equipped with premium DU self-lubricating composite bearings, these provide robust radial support against abrupt load fluctuations and high-frequency startup cycles, significantly extending the operational lifespan of the drive shaft.

• Precision Gear Mesh Profile: CNC precision-ground gear pairs with optimized pressure angles ensure smooth discharge and significantly dampened hydraulic shocks, achieving industry-leading noise performance.

Application Areas:

• Agriculture: Multi-valve power sources for tractors and combine harvesters.

• Mobile Equipment: Working implement drive pumps for skid steer loaders and mini-excavators.

• Material Handling: Hydraulic power supply for forklifts and logistics lift platforms.

• Municipal Vehicles: Rotary brush motors for street sweepers and compactor mechanisms for refuse vehicles.

Expert Maintenance Tips:

• Suction Vacuum Limitation: The HPLPA series is sensitive to inlet flow restrictions. Ensure suction lines have adequate inner diameters, and keep absolute pressure above 0.8 bar. Fluid starvation causes cavitation, leading to rapid erosion of gear end-faces and bushings.

• Initial Startup Protocol: Pre-fill the pump with hydraulic fluid before installation. Jog the motor at low speed to bleed all trapped air from the system before applying any load. Never operate the pump in a dry-start condition.

• Fluid Cleanliness Management: To protect the precision fit of the floating side plates and pump housing, maintain system fluid cleanliness at ISO 4406 19/17/14 or better.