GPC4 Series High Pressure Gear Pump | GPC4-25 GPC4-32/80 | Cast Iron Pump

LIC Hydraulic specializes in the GPC4 Series, a heavy-duty, high-pressure gear pump range designed for the most punishing industrial and mobile environments. Featuring a rugged three-piece cast iron construction, the GPC4 series—including single pumps like GPC4-25-1E2F1 and tandem units like GPC4-32/80—offers superior mechanical integrity and thermal stability compared to aluminum alternatives. Rated for continuous pressures exceeding $25\text{ MPa}$ ($3625\text{ PSI}$), these pumps are the heart of hydraulic systems in mining, construction, and heavy material handling.

Technical Specifications (Bulleted List)

• Series: GPC4 (Heavy-duty Cast Iron Series).

• Configurations: Single, Double, and Multiple pump options.

• Pressure Rating: Nominal $25\text{ MPa}$, Peak up to $31.5\text{ MPa}$.

• Material: High-tensile cast iron housing and end covers.

• Rotation: Left-hand (L) or Right-hand (R) specified by model.

• Mounting: Variety of SAE and ISO standard flanges/shafts.

Key Technical Advantages

• Rigid Cast Iron Housing: Minimizes body expansion under high-pressure spikes, maintaining tight internal tolerances and preventing efficiency drop.

• Advanced Pressure Compensation: Floating bushings automatically adjust for axial clearance, ensuring maximum volumetric performance throughout the life of the pump.

• High Load Capacity: Equipped with heavy-duty DU bearings to handle significant radial and axial stresses from hydraulic shocks.

• Modular Tandem Design: The GPC4-32/80 configuration allows multiple independent flows from a single drive source, simplifying system layout and reducing costs.

Application Areas

• Construction Equipment: Primary hydraulic pumps for heavy loaders, dozers, and excavators.

• Mining Machinery: Powering hydraulic drives in drilling and crushing equipment.

• Industrial Presses: Reliable flow for high-tonnage scrap metal balers and shears.

Expert Maintenance Tips

• Initial Priming: Before the first start-up, fill the GPC4-32/80 housing with clean hydraulic fluid and manually rotate the shaft to ensure the bushings are lubricated.

• Inlet Vacuum: Ensure the suction line is large enough to prevent cavitation. A vacuum exceeding $-0.02\text{ MPa}$ will lead to internal erosion and noise.

• Filtration Integrity: Maintain an oil cleanliness level of $ISO\text{ 19/17/14}$. Given the high-pressure capabilities of the GPC4, hard particulates can quickly cause internal “scoring” and lead to pressure loss.

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