890-EI-1000-RS2-C-502 Hydraulic Internal Gear Pump | 890-EI Series | High Pressure 300 Bar

LIC Hydraulic’s 890-EI Series represents the pinnacle of industrial-grade high-pressure internal gear pump technology. Engineered for the most demanding duty cycles, the 890-EI-1000-RS2-C-502 offers 100% seamless interchangeability with global industrial standards. Featuring dual radial and axial pressure compensation, this 100cc pump maintains exceptional volumetric integrity at continuous pressures up to 300 bar. It is widely recognized for its ultra-low noise emission and near-zero flow pulsation, making it the preferred choice for high-precision hydraulic power units (HPUs) and servo-driven systems.

Technical Specifications

• Model String: 890-EI-1000-RS2-C-502

• Displacement: 100.0 cm³/rev

• Rated Pressure: 300 bar (4350 psi)

• Peak Pressure: 325 bar (4712 psi)

• Max Speed: 3600 rpm

• Min Speed: 400 rpm (Ideal for VFD/Servo applications)

• Volumetric Efficiency: $\ge 97\%$

• Shaft Type: RS2 (Reinforced Keyed or Splined Shaft)

• Noise Emission: $\le 68\text{ dB(A)}$ at full load conditions

Key Technical Advantages

• Dual Pressure Compensation: The internal floating plates automatically optimize internal clearances based on real-time load, ensuring maximum efficiency even at low RPMs.

• Enhanced Durability: Utilizing precision-ground nitrided gears and heavy-duty sliding bearings, the 890-EI series is built to resist wear and handle fine particle contamination better than standard gear pumps.

• Minimal Flow Ripple: The internal gear engagement geometry produces a highly stable flow with minimal pulsation, significantly reducing harmonic vibrations in hydraulic circuits and protecting sensitive valves.

• Energy Efficiency: High overall efficiency leads to reduced heat generation, allowing for smaller reservoirs and extended fluid life in continuous-duty applications.

Application Areas

• Precision Injection Molding: Reliable power for clamping, injection, and auxiliary movements.

• Heavy Hydraulic Presses: Core power source for metal forming, scrap baling, and shearing machinery.

• Servo-Hydraulic Drives: Perfect for integration with servo motors to achieve extreme energy savings and precision control.

• Laboratory Test Rigs: Ideal for simulation environments requiring ultra-quiet fluid power.

Expert Maintenance Tips

• Mandatory Bleeding: Before the initial run, ensure all air is evacuated from the pump housing and the unit is pre-filled with filtered oil. Entrapped air will cause cavitation and rapid mechanical scoring.

• Viscosity Management: Maintain operating temperatures between 30°C and 50°C. Low viscosity can compromise the protective oil film within the internal gear teeth, leading to premature wear.

• Check Rotation: The 890-EI is a unidirectional pump. Ensure the drive motor rotation matches the pump’s designated direction to prevent compensator failure and catastrophic damage.