890-EI-0630-RS2-C313 | Eckerle Internal Gear Pump 6.3L/min 420bar

Product Overview

The 890-EI-0630-RS2-C313 is a flagship model of the German ECKERLE 890-EI series high-pressure internal gear pumps. Founded in 1935, ECKERLE is the inventor of the internal gear pump and holds the foundational patent for internal gear pump technology. In the 1970s, ECKERLE invented a new type of radial and axial compensated internal gear pump, rewriting the history that gear pumps could only be used for medium and low pressures, and successfully solving the problems of high pulsation and high noise.

The 890-EI series internal gear pumps are specifically designed for high-pressure servo systems, featuring a high-strength cast iron body and internal gear structure, delivering outstanding advantages of high pressure, low noise, and low pulsation. The series is widely used in injection molding machines, die-casting machines, bending machines, press machines, and servo hydraulic energy-saving systems.

Model code 890-EI-0630-RS2-C313 breakdown:

• 890: Product series code

• EI: Internal Gear Pump identifier

• 0630: Displacement/flow code, corresponding to rated flow of 6.3 L/min (@ 1500 rpm)

• RS2: Shaft and seal configuration code

• C313: Port and mounting configuration code

We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. The 890-EI-0630-RS2-C313 offers 100% direct interchangeability with original ECKERLE pumps of the same model—no modification required. Every unit undergoes 100% simulated load testing before shipment, ensuring performance validation under real-world operating conditions.

Technical Specifications 

Model & Series Information:

• Model: 890-EI-0630-RS2-C313

• Brand Series: ECKERLE 890-EI Series

• Pump Type: Internal gear pump

• Body Material: High-strength cast iron

• Bearing Material: Steel/Bronze

• Country of Origin: Germany

Flow & Pressure Parameters:

• Rated Flow: 6.3 L/min (@ 1500 rpm)

• Maximum Operating Pressure: Up to 420 bar (model-dependent)

• Rated Pressure: 350 bar

• Peak Pressure: 420 bar

Efficiency & Noise Parameters:

• Volumetric Efficiency: Up to 92%

• Noise Level: Below 66 dB

• Pressure Pulsation: Approx. 2%

Design Features:

• Pressure Compensation: Radial and axial pressure compensation

• Port Layout: Suction and pressure ports at 180°

• Safety Certification: EN ISO 12100 (Safety of machinery)

Key Technical Advantages

1. Inventor of Internal Gear Pump—Genuine German Technology

ECKERLE is the inventor of the internal gear pump and holds the foundational patent for internal gear pump technology. The 890-EI series inherits nearly a century of ECKERLE technological expertise, featuring the patented two-piece eccentric gap-filling design that enhances radial pressure compensation performance. This unique design ensures outstanding performance and extended service life under high-pressure conditions.

2. Ultra-Low Noise Operation (<66 dB)—Industry-Leading Quiet Performance

The 890-EI series internal gear pumps deliver noise levels below 66 dB. Compared to conventional external gear pumps, the internal gear design significantly reduces fluid pulsation and mechanical noise, making it ideal for noise-sensitive applications such as injection molding machines, medical equipment, and precision machining facilities.

3. Extremely Low Pressure Pulsation (Approx. 2%)—Ensuring Smooth System Operation

The 890-EI series internal gear pumps feature pressure pulsation of only approximately 2%. This exceptionally low pressure pulsation significantly enhances hydraulic system control precision and stability, ensuring smooth mechanical operation—particularly suitable for precision equipment such as injection molding machines and die-casting machines where pressure and flow stability are critical.

4. Radial and Axial Pressure Compensation—High Efficiency with Long Service Life

The 890-EI series features radial and axial pressure compensation design, maximizing pump efficiency. Specially designed arc-shaped components with unique materials provide radial compensation, effectively reducing internal leakage and achieving volumetric efficiency up to 92%. The high-strength cast iron body is approximately 30% stronger than aluminum-bodied pumps, ensuring reliable operation under extreme pressures and temperatures.

5. Modular Design with Flexible Servo System Integration

The 890-EI series features a compact modular design with customizable mounting holes, offering a 20% smaller footprint than standard industrial pumps. Engineered specifically for servo-driven applications, it seamlessly integrates into automation equipment, construction machinery, and industrial equipment. With a wide range of flow combinations, it can be configured as dual or multi-pump assemblies.

Application Areas

• Injection Molding Machines—clamping, injection, and ejection hydraulic systems

• Die-Casting Machines—injection and clamping hydraulic systems

• Bending Machines—hydraulic bending systems

• Press Machines—hydraulic stamping systems

• Servo Hydraulic Energy-Saving Systems—servo motor-driven hydraulic systems

• Construction Machinery—hydraulic systems for forklifts and engineering vehicles

• Industrial Hydraulic Machinery—various industrial hydraulic equipment

Expert Maintenance Tips

Model Code Verification (verify each element):

Before installation, carefully verify the complete model code on the pump nameplate—890-EI-0630-RS2-C313—and confirm the following:

• 890: Product series code.

• EI: Internal Gear Pump identifier.

• 0630: Displacement/flow code, corresponding to rated flow of 6.3 L/min (@ 1500 rpm).

• RS2: Shaft and seal configuration code.

• C313: Port and mounting configuration code.

Verify Rotation Direction:

Confirm that the drive shaft rotation matches the pump configuration. Incorrect rotation will prevent pressure build-up and may damage internal gears and bearings.

Suction Line and Inlet Pressure Requirements:

890-EI series internal gear pumps are sensitive to suction resistance. Ensure the suction line is properly sealed with no air leaks, and the suction filter is not clogged. Recommended suction vacuum does not exceed 0.3 bar (absolute pressure).

Coupling Alignment Precision:

Ensure shaft concentricity between the pump and drive shaft is within 0.05 mm during installation. Excessive misalignment will cause premature bearing wear, seal leakage, or even shaft fracture. Use flexible couplings and dial gauges for precise alignment.

Oil Cleanliness Management:

ECKERLE internal gear pumps have high requirements for oil cleanliness. Hydraulic oil with cleanliness not lower than ISO 4406 18/16/13 is recommended. Ensure the suction line is properly sealed to prevent air ingress and cavitation.

First-Start Priming Procedure:

After new pump installation or system overhaul, perform priming before first start. Jog the pump at low speed and low pressure until the pump body is fully filled with oil and air is purged, then gradually increase to rated speed and working pressure. Running the pump dry will cause irreversible damage to gears and bearings.

Regular Maintenance and Temperature Monitoring:

Replace hydraulic oil and return filters every 1,000 operating hours or per equipment manufacturer recommendations. Regularly monitor pump body temperature—if it consistently exceeds +80°C, inspect the system cooling and relief valve settings.