890-EI-1000-RS2-C503 ECKERLE Gear Pump 100 cm³/rev 320 bar

Product Overview

The 890-EI series is a highly representative high-pressure internal gear pump product line from ECKERLE—a renowned German manufacturer of internal gear pumps. This series covers multiple displacement specifications including 890-EI-0320, 890-EI-0640, 890-EI-1000, and 890-EI-1250, with displacements ranging from 32 to 125 cm³/rev and operating pressures up to 320 bar. These pumps are widely used in injection molding machines, forming machines, servo hydraulic energy-saving systems, and various industrial high-pressure hydraulic machinery.

As a professional hydraulic component manufacturer, we provide 100% interchangeable replacement solutions for the ECKERLE 890-EI series. Every 890-EI series internal gear pump undergoes 100% performance testing under simulated actual operating conditions—from displacement accuracy and pressure stability to volumetric efficiency—fully benchmarked against ECKERLE original equipment standards.

Model Code Explanation (using 890-EI-1000-RS2-C503 as an example):

• 890: Product series code

• EI: Internal Gear Pump series identifier

• 1000: Displacement code—corresponds to 100 cm³/rev

• RS2: Mounting flange type and shaft configuration code

• C503: Special configuration/seal options code (different suffixes represent different port configurations and seal materials)

Technical Specifications 

890-EI-0320-RS2-C313

• Brand: ECKERLE (Germany)

• Series: 890-EI Internal Gear Pump

• Theoretical Displacement: 32 cm³/rev

• Maximum Operating Pressure: 320 bar

• Design Features: Axial and radial pressure compensation

• Noise Level: Low noise

• Pressure Pulsation: Low pulsation

• Suction & Pressure Port Angle: 180°

• Applications: Servo hydraulic systems, injection molding machines

890-EI-0640-RS2-C302

• Brand: ECKERLE (Germany)

• Series: 890-EI Internal Gear Pump

• Theoretical Displacement: 64 cm³/rev

• Material: Cast iron

• Suction & Pressure Port Angle: 180°

• Noise Level: Low noise

• Pressure Pulsation: Low pulsation (approx. 2%)

• Applications: Industrial high-pressure hydraulic machinery, servo systems

890-EI-1000-RS2-C503

• Brand: ECKERLE (Germany)

• Series: 890-EI Internal Gear Pump

• Theoretical Displacement: 100 cm³/rev

• Material: Cast aluminum

• Design Features: Axial and radial clearance compensation

• Suction & Pressure Port Angle: 90°

• Noise Level: Low noise, conforms to DIN 45635 standard

• Multiple Pump Configuration: Available

• Applications: Injection molding machines, forming machines, servo hydraulic energy-saving systems

890-EI-1250-RS2-C602

• Brand: ECKERLE (Germany)

• Series: 890-EI Internal Gear Pump

• Theoretical Displacement: 125 cm³/rev

• Material: Cast aluminum

• Suction & Pressure Port Angle: 180°

• Noise Level: Low noise, < 66 dB

• Pressure Pulsation: < 2%

• Applications: Injection molding machines, servo hydraulic systems

Important Note: The above specifications are compiled from ECKERLE official technical documentation and publicly available industry data. Different suffix codes (RS2, RK2, etc.) represent different mounting flanges, shaft configurations, and seal specifications. Please refer to the product nameplate or technical agreement for exact specifications.

Key Technical Advantages

1. Axial and Radial Clearance Compensation — High Efficiency Across All Conditions

The 890-EI series features dual axial and radial clearance compensation—with special material arc-shaped components for radial compensation. This design minimizes internal leakage and maintains high volumetric efficiency across the entire operating pressure range, with stable flow and minimal pressure fluctuation, significantly reducing system energy consumption.

2. Low Pressure Pulsation (< 2%) — Smooth System Operation

The 890-EI series internal gear pump delivers extremely low pressure pulsation of approximately 2%. This low pulsation characteristic minimizes excitation from hydraulic valves, piping, and mechanical components (approx. 2–3%), ensuring smooth hydraulic system operation and extending the service life of other system components.

3. Ultra-Low Noise Operation (< 66 dB) — Conforms to DIN 45635

The 890-EI series operates at noise levels below 66 dB, conforming to DIN 45635 noise testing standards. Maintaining quiet operation across the entire operating range, it is particularly suitable for noise-sensitive environments such as injection molding workshops, medical equipment applications, and precision manufacturing facilities.

4. High-Strength Cast Iron/Cast Aluminum Housing — Lightweight with High Strength

The 890-EI series pump body is manufactured from high-strength cast iron or cast aluminum, achieving optimal weight control while maintaining structural rigidity and impact resistance. The cast iron version offers approximately 30% higher strength than aluminum-bodied pumps.

5. Extended Service Life with High Reliability

The 890-EI series features exceptionally long service life. High-quality bearings and precision machining processes ensure stable performance across the entire pressure range. With long design life and low maintenance costs, it is particularly suitable for industrial applications requiring long-term continuous operation.

6. Flexible Multiple Pump Configurations

The 890-EI series supports duplex or multiple pump combinations. Multiple gear pumps can be connected in series or parallel to meet complex system flow and pressure requirements, saving installation space and piping costs.

Application Areas

• Injection Molding Machine Hydraulic Systems: Main pumps and servo energy-saving retrofits for molding equipment

• Forming Machines & Die-Casting Machines: Hydraulic power supply for forming equipment

• Servo Hydraulic Energy-Saving Systems: High-efficiency energy-saving hydraulic systems driven by servo motors

• Industrial High-Pressure Hydraulic Machinery: Various industrial hydraulic power units

• Construction Machinery: Hydraulic systems for excavators, loaders, and related equipment

• Automation Equipment: Hydraulic power supply for precision automated production lines

• Lubrication & Transfer Systems: Lubrication pumps, transfer pumps, etc.

Expert Maintenance Tips

1. Verify Rotation Direction

890-EI series pumps must only be operated in the specified rotation direction. Always verify that the rotation direction marked on the nameplate matches the drive motor’s rotation before installation. Reverse operation is strictly prohibited.

2. First Start-up and Priming

Ensure the pump cavity is fully primed with hydraulic fluid before first start-up. Purge air from the highest point of the pump body to ensure no air remains in the cavity. Never start the pump dry—this will cause severe wear of internal gears and bearings.

3. Fluid Cleanliness Management

Internal gear pumps are sensitive to fluid cleanliness. Maintain fluid cleanliness to ISO 4406 standards. Install appropriately rated filters on the pump suction line and regularly inspect filter element condition.

4. Suction and Pressure Port Verification

Different 890-EI models have different suction and pressure port angles—some models feature 90° ports, while others feature 180°. Verify port configuration before installation to ensure correct piping connections.

5. Pressure Limits

• Maximum Operating Pressure: 320 bar

• Never exceed rated pressure—peak pressure is permitted for short-term transient conditions only

6. Temperature Monitoring

• Recommended Operating Oil Temperature: 30–60°C

• Outside this range, inspect the cooling system or select special seal configurations

7. Regular Inspection and Maintenance

Inspect the system filter element condition every 500 operating hours. Regularly monitor the pump for abnormal operating noise—if abnormal noise, excessive housing temperature rise, or system pressure drop is detected, shut down immediately for inspection. The 890-EI series features long design life with few wear parts and low maintenance costs.