NT Series Internal Gear Pump | NT2 NT3 NT4 NT5 | NT5-C200F NT5-G125F

The NT Series from LIC Hydraulic is a premier line of internal meshing gear pumps designed for high-pressure, high-precision applications. Covering a wide range from NT2 to NT5, these pumps are the industry benchmark for low-noise and high-efficiency power delivery. Models like NT5-C200F and NT5-G125F are engineered for continuous duty in demanding industrial circuits. We guarantee 100% mechanical interchangeability and subject every unit to 100% dynamic pulsation and full-load pressure testing, ensuring professional reliability for your hydraulic systems.

Technical Configuration Details

• Series Range: NT2, NT3, NT4, NT5 (NBZ/NB3 equivalent).

• Displacement Range: From compact sizes to high-flow $250\text{ cc/rev}$.

• Pressure Rating: Continuous pressure up to $250\text{–}315\text{ bar}$ ($3600\text{–}4500\text{ psi}$).

• Design: Internal meshing with radial and axial pressure compensation.

• Mounting: Flange mounting (F) with standard shaft configurations.

Key Technical Advantages

• Ultra-Low Noise Operation: The specialized internal gear geometry ensures exceptionally smooth meshing. This results in noise levels $10\text{–}15\text{ dB}$ lower than traditional external gear pumps, making them ideal for silent industrial power units.

• Minimal Pressure Pulsation: Multiple-tooth engagement significantly reduces flow ripples. This enhances the precision of servo and proportional control valves and extends the life of downstream components.

• Sophisticated Compensation Structure: Automatic axial and radial gap compensation maintains volumetric efficiency as high as $98\%$, even under extreme pressure conditions.

• Exceptional Service Life: Built with high-tensile materials and optimized lubrication paths, the NT series minimizes internal mechanical stress, offering thousands of hours of reliable performance in 24/7 industrial environments.

Application Areas

• Plastics Machinery: Primary pump for servo-driven injection molding machines.

• Sheet Metal Machinery: CNC bending machines and hydraulic shears.

• Precision Pressing: Small-scale stamping presses and stretching machines.

• General Industry: Elevators, test benches, and high-spec industrial power packs.

Expert Maintenance Tips

• Never Run Dry: Internal gear pumps rely heavily on the hydraulic fluid for lubrication. Ensure the pump is fully primed with clean oil before the initial startup.

• Suction Line Integrity: To prevent cavitation, maintain an inlet vacuum of no more than $-0.2\text{ bar}$. Ensure the suction pipe is large enough to facilitate free oil flow.

• Filtration Management: To preserve the precision internal clearances and maintain high efficiency, keep hydraulic fluid filtered to at least ISO 4406 19/17/14.