Casappa Polaris GP3 GP2 GP1 Series Hydraulic Gear Pump | Tandem & Triple Pump | High Pressure 250 Bar

LIC Hydraulic’s GP Series (Polaris Compatible) represent the pinnacle of modular hydraulic power. These external gear pumps, available in Group 1, 2, and 3 frame sizes, are renowned for their exceptional tandem capability. As demonstrated by configurations like GP3F0394R…-GP1M…-GP1R…, we specialize in complex triple and quadruple pump assemblies that offer 100% drop-in interchangeability with Casappa Polaris units. Our GP series is designed to handle high-pressure demands up to 250 bar, with every multi-stage unit undergoing 100% individual stage load testing to ensure zero internal cross-leakage and maximum volumetric performance.

Technical Specifications

• Series Name: GP Series (Casappa Polaris Equivalent)

• Displacement (GP3): 22.1 – 91.1 cm³/rev (e.g., 0514 = 51.4cc)

• Displacement (GP2): 4.1 – 31.5 cm³/rev (e.g., 0279 = 27.9cc)

• Displacement (GP1): 1.1 – 13.8 cm³/rev (e.g., 0061 = 6.1cc)

• Rated Pressure: 250 bar (3625 psi)

• Peak Pressure: 280 bar (4060 psi)

• Max Operating Speed: Up to 3000 rpm

• Body Material: High-tensile extruded aluminum alloy

• Flange & Cover Material: Heavy-duty cast iron

Key Technical Advantages

• Axial Pressure Compensation: Utilizing floating pressure-balanced thrust plates, our pumps maintain optimal clearance between gear faces, sustaining over 95% volumetric efficiency even at high temperatures.

• Premium DU Bearing System: Equipped with high-performance composite DU bearings, the GP series offers superior radial load capacity, essential for the high-torque demands of tandem assemblies.

• Low-Noise Gear Profiles: Precision-ground gears with optimized tooth profiles minimize fluid pulsation, resulting in a quieter operation within industrial and mobile environments.

• Rugged Multi-Stage Coupling: The intermediate drive shafts are heat-treated to withstand the cumulative torque required by triple or quadruple configurations, ensuring structural integrity during heavy duty cycles.

Application Areas

• Material Handling: Main lift and auxiliary steering pumps for electric and diesel forklifts.

• Agriculture: Harvesting headers and reel drives for combines and tractors.

• Waste Management: Compression and auxiliary circuits for refuse collection vehicles.

• Mobile Construction: Multi-circuit supply for mini-loaders and telehandlers.

Expert Maintenance Tips

• Alignment Precision: Ensure the drive shaft alignment is within 0.05mm TIR. Misalignment is the primary cause of premature shaft seal failure and bearing wear.

• Inlet Suction Integrity: For tandem units, verify all suction lines are air-tight. Air ingress leads to cavitation, which can destroy gear surfaces in the primary stage within hours.

• Filtration Protocol: Maintain a fluid cleanliness level of ISO 4406 20/18/15. Given that gear pumps are “silt-sensitive,” we recommend replacing return line filters every 1,000 operating hours.