Casappa AP Series Gear Pump | AP200/22 D 838 | AP100 AP200 AP300

LIC Hydraulic proudly offers the Casappa AP Series—a premium line of high-pressure external gear pumps designed for maximum durability. Available in AP100, AP200, and AP300 frames, these pumps utilize a high-strength aluminum alloy body paired with cast iron mounting flanges and rear covers. The featured models, AP200/22 D 838 and AP200/22 S 838, are the industry choice for applications requiring constant high pressure up to $250\text{ bar}$. Known for their compact footprint and modular versatility, the AP series is the perfect heart for your hydraulic system.

Technical Specifications (Quick Reference)

• Displacement Range: $1.07\text{ cc/rev}$ (AP100) to over $70\text{ cc/rev}$ (AP300).

• Operating Pressure: Continuous up to $250\text{ bar}$ ($3625\text{ PSI}$); Intermittent up to $300\text{ bar}$.

• Material: High-tensile aluminum body with heat-treated alloy steel gears.

• Configurations: Available as single or multiple units (tandem pumps) with common or separate inlets.

Key Technical Advantages

• Superior Efficiency: Axial pressure compensation ensures minimum internal leakage and consistent volumetric efficiency throughout the pump’s service life.

• Rugged Construction: The combination of premium materials and DU-style bushings allows the AP series to withstand extreme thermal cycles and shock loads.

• Low Noise Emission: Precision gear tooth profiles minimize ripple and fluid-borne noise, contributing to a quieter operator environment in mobile equipment.

• Global Interchangeability: Built to international SAE and European standards, the AP200 and AP300 series are easy to integrate as drop-in replacements for most major hydraulic brands.

Application Areas

• Mobile Equipment: Hydraulic power for tractors, aerial work platforms, and steering systems.

• Construction Machinery: Auxiliary pumps for road rollers, skid steers, and mini-excavators.

• Industrial HPUs: Compact hydraulic units for machine tool clamping and material handling.

Expert Maintenance Tips

• Priming the Pump: Before first-time operation, fill the pump body with clean hydraulic fluid. Dry starts on high-pressure gear pumps can cause immediate galling of the pressure plates.

• Inlet Vacuum: Ensure the suction line is airtight and free of restrictions. High vacuum at the inlet will lead to cavitation, resulting in premature wear of the internal aluminum housing.

• Alignment Check: For direct motor mounting, ensure the coupling alignment is within $0.1\text{ mm}$. Excessive misalignment puts unnecessary radial stress on the pump shaft, leading to seal failure.