890-EI Series Internal Gear Pump | 890-EI-0400, 0800, 1250 | Silent Servo Pump

890-EI Series High-Performance Silent Internal Gear Pumps

Product Overview: The 890-EI Series is a premier power source for industrial high-pressure hydraulic systems, renowned for its silent operation and extreme efficiency. As a high-performance internal gear pump, this series is specifically engineered for servo-driven applications demanding sustained high pressures (Rated 31.5 MPa) and ultimate smoothness. This featured range includes core models: the medium-displacement 890-EI-0400-RS2-C302 and 890-EI-0640-RS2-C301, as well as heavy-duty high-flow specs 890-EI-0800-RS2-C502 and 890-EI-1250-RK2-H601. Its unique gap compensation technology ensures near-perfect volumetric efficiency, especially under variable-speed servo-drive conditions.

Key Technical Advantages:

• Ultra-Quiet & Low Pulsation: Utilizing the internal meshing principle, operational noise levels are significantly lower than external pumps. Minimal pressure ripples drastically reduce system vibration and extend the service life of hydraulic lines, seals, and actuators.

• Dual Gap Compensation: Equipped with automated axial and radial pressure compensation mechanisms. Even at continuous high pressures of 31.5 MPa (315 Bar), it maintains a volumetric efficiency above 95%, effectively minimizing internal leakage and oil overheating.

• Ideal Partner for Servo Drives: Exceptional low-speed performance (stable high pressure even at 10-50 RPM) matches servo motor dynamics perfectly, enabling high-precision flow control and superior energy efficiency for machinery.

• 100% Direct Replacement: Codes like RS2 and RK2 define the drive shaft types (e.g., Keyed or Splined), while suffixes like C302/H601 guarantee that mounting flanges and port configurations are fully compatible with original systems.

• Target Applications: CNC bending machines, servo hydraulic presses, ceramic brick presses, injection molding machines, and various closed-loop servo hydraulic systems.

Detailed Models & Parameters:

• Core Series: 890-EI High Pressure Series.

• Model Keywords: 890-EI-0400-RS2-C302, 890-EI-0800-RS2-C502, 890-EI-0640-RS2-C301, 890-EI-1250-RK2-H601.

• Displacements: Covering precise specs: 40cc, 64cc, 80cc, and 125cc/rev.

• Pressure Ratings: Rated at 31.5 MPa (315 Bar); Peak pressure up to 35 MPa (5075 PSI).

• Speed Range: Supports 300 – 3000 RPM (broader range achievable with servo integration).