EIPC5-100RA23-10 Eckerle Internal Gear Pump 250 bar 3000 rpm

Product Overview

The EIPC5-050RA23-10, EIPC5-100RA23-10, EIPC6-125RA23-11, and EIPH2-016RK03-1X are high-performance internal gear pumps from Germany’s Eckerle Technologies GmbH – a family-owned enterprise with over 40 years of experience in the design and manufacture of internal gear pumps. Eckerle internal gear pumps are renowned for their ultra-low pressure pulsation (≈2%), low noise (≤66 dB), and axial & radial gap compensation technologies, making them the ideal power source for high-precision hydraulic systems in injection molding machines, servo-hydraulic systems, and machine tools.

The EIPC Series features internal gear pump construction with integrated axial and radial gap compensation, maintaining excellent operating efficiency even under partial load conditions. The EIPH Series further optimizes this design, delivering continuous operating pressures up to 330 bar and peak pressures up to 350 bar.

Key Interchangeability Advantage: Our EIPC/EIPH series internal gear pumps are manufactured to strict German Eckerle original design specifications, ensuring 100% direct interchangeability with original units. All mounting interfaces, flange dimensions, shaft configurations, and port positions are identical to the original product – no modifications required. Every pump undergoes 100% factory performance testing under simulated operating conditions (covering rated pressure, peak pressure, and full speed range performance curves), guaranteeing plug-and-play reliability with zero performance deviation.

Model Code Breakdown (based on Eckerle series designation rules):

• EIPC = Industrial Internal Gear Pump / EIPH = High-Pressure Internal Gear Pump

• 5 / 6 = Size code (EIPC5 / EIPC6) / 2 = Size code (EIPH2)

• 050 / 100 / 125 / 016 = Nominal displacement (cm³/rev)

• RA = Shaft type: Straight keyed shaft (RA23-10: 32 mm straight keyed; RK03-1X: straight keyed shaft with PTO)

• 23 / 11 / 1X = Design code and revision

Technical Specifications 

EIPC5-050RA23-10

• Product Series: EIPC5 Series Internal Gear Pump

• Displacement: 50 cm³/rev (approx.)

• Continuous Operating Pressure: 250 bar

• Peak Pressure: Up to 300 – 350 bar

• Pressure Pulsation: Approx. 2%

• Maximum Speed: 3000 rpm

• Volumetric Efficiency: ≥ 95%

• Mounting Flange: SAE C 2-bolt

• Shaft Type: RA23-10 = Straight keyed shaft

• Rotation: Right-hand (clockwise)

• Seals: NBR

• Weight: Approx. 13.8 kg

• Operating Temperature Range: -20°C to +100°C

• Recommended Fluid Viscosity: 10 – 300 mm²/s

• Inlet Pressure: 0.8 – 2 bar abs

EIPC5-100RA23-10

• Product Series: EIPC5 Series Internal Gear Pump

• Displacement: 100.5 cm³/rev

• Continuous Operating Pressure: 250 bar

• Peak Pressure: 300 bar

• Pressure Pulsation: Approx. 2%

• Maximum Speed: 3000 rpm

• Minimum Speed: 150 rpm

• Volumetric Efficiency: > 95%

• Mounting Flange: SAE C 2-bolt

• Shaft Type: 32 mm straight keyed shaft

• Rotation: Right-hand (clockwise)

• Seals: NBR

• Weight: Approx. 13.8 kg

• Operating Temperature Range: -20°C to +100°C

• Recommended Fluid Viscosity: 10 – 300 mm²/s

• Inlet Pressure: 0.8 – 2 bar abs

EIPC6-125RA23-11

• Product Series: EIPC6 Series Internal Gear Pump

• Displacement: 125.7 cm³/rev

• Continuous Operating Pressure: 250 bar

• Peak Pressure: 300 bar (per series standard)

• Pressure Pulsation: Approx. 2%

• Maximum Speed: 2800 rpm

• Minimum Speed: 150 rpm

• Mounting Flange: SAE D 2-bolt

• Shaft Type: 40 mm straight keyed shaft

• Rotation: Right-hand (clockwise)

• Seals: NBR

• Weight: Approx. 27.3 kg

• Operating Temperature Range: -20°C to +100°C (per series standard)

• Recommended Fluid Viscosity: 10 – 300 mm²/s (per series standard)

EIPH2-016RK03-1X

• Product Series: EIPH2 Series High-Pressure Internal Gear Pump

• Displacement: 15.8 cm³/rev

• Continuous Operating Pressure: 330 bar

• Peak Operating Pressure: 350 bar (10 sec, 15% duty cycle)

• Maximum Speed: 4000 rpm

• Rated Speed Range: 400 – 3000 rpm

• Mounting Flange: SAE B 2-bolt

• Shaft Type: Straight keyed shaft with PTO

• Rotation: Right-hand (clockwise)

• Seals: NBR (per series standard)

• Weight: Approx. 5.7 kg

• Operating Temperature Range: -20°C to +80°C (per series standard)

• Recommended Fluid Viscosity: 10 – 300 mm²/s

Key Technical Advantages

1. Axial and Radial Gap Compensation for High Efficiency and Long Service Life

The EIPC/EIPH Series features integrated axial and radial gap compensation with a patented two-piece eccentric gap-fill design, delivering radial pressure compensation. This design ensures automatic hydraulic clearance adjustment between gears and housing under all operating conditions, significantly improving volumetric efficiency (≥ 95% ), minimizing internal leakage, and maintaining stable efficiency even under partial load conditions.

2. Ultra-Low Pressure Pulsation (≈2%) for Smooth System Operation

The EIPC/EIPH Series delivers pressure pulsation of only approximately 2%. Ultra-low pressure pulsation effectively reduces hydraulic system vibration, ensuring smooth equipment operation and extending the service life of other hydraulic system components.

3. Ultra-Low Noise Operation (≤ 66 dB) for Indoor and Quiet Environments

Thanks to the optimized internal gear design and gap compensation structure, the EIPC/EIPH Series operates at extremely low noise levels, with test values below 66 dB(A) . This characteristic makes it particularly suitable for injection molding workshops, laboratories, indoor precision equipment, and other applications with strict noise requirements.

4. High Pressure Capacity for Heavy-Duty Applications

The EIPC Series delivers continuous operating pressure of 250 bar with peak pressures of 300 bar; the EIPH Series delivers even higher continuous pressure of 330 bar with peak pressures of 350 bar. The EIPH2-016RK03-1X additionally withstands maximum speeds of 4000 rpm, making it ideal for high-speed, heavy-duty applications.

5. Flexible Configurations and Multi-Pump Combination Capability

The EIPC/EIPH Series supports single, tandem, and multiple pump combinations, adaptable to various hydraulic system configurations. Suction and pressure ports are arranged at 180° for convenient piping layout.

Application Areas

• Injection Molding Machinery: Hydraulic systems for injection molding machines and rubber injection molding – the EIPC Series is specifically developed for injection molding machine technology

• Servo-Hydraulic Systems: Variable-speed servo-driven hydraulic systems

• Press Technology: Hydraulic presses, stamping equipment

• Conveyor and Lifting Technology: Conveying equipment, lifting machinery

• Marine Engineering: Marine hydraulic systems

• Paper Industry: Paper machinery hydraulic systems

• Power Generation and Wind Power: Power plant technology, wind turbine hydraulic systems

• Forklifts and Stackers: Material handling equipment hydraulic systems

• Brake Ventilators: Brake ventilation systems for container gantries, cranes, and lifts

Expert Maintenance Tips

1. Pre-Installation Checks

• EIPC/EIPH Series pumps have a fixed rotation direction – verify pump rotation is right-hand (clockwise) matches system drive direction before installation.

• Check mounting flange type (EIPC5: SAE C 2-bolt; EIPC6: SAE D 2-bolt; EIPH2: SAE B 2-bolt) to ensure compatibility with system interface.

• Confirm shaft type specifications (EIPC5-100: 32 mm straight keyed shaft; EIPC6-125: 40 mm straight keyed shaft; EIPH2-016: straight keyed shaft with PTO).

2. First Start-Up & Oil Priming

• Prime the pump housing with clean hydraulic oil before first start-up; ensure the suction line is fully filled – never run dry.

• Inlet pressure must be maintained within 0.8 – 2 bar abs.

• Recommended fluid: HL/HLP mineral hydraulic oil (DIN 51524), viscosity range 10 – 300 mm²/s.

• Maintain operating temperature within -20°C to +100°C.

3. Filtration & Fluid Cleanliness

• System filtration should meet ISO 4406 cleanliness class 20/18/15 or better.

• Regularly monitor fluid cleanliness to prevent contaminants from accelerating gear and bearing wear.

4. Operating Monitoring

• The EIPC/EIPH Series is renowned for low noise and low pulsation – if abnormal noise or pressure fluctuation occurs, first check suction lines for leakage or blockage.

• EIPH Series peak pressure (350 bar) is permitted for 10 seconds maximum at 15% duty cycle – do not operate continuously at peak pressure.

• Regularly check torque on pump and piping connection bolts to prevent loosening from vibration.

5. Model Confirmation and Selection

• The EIPC Series (industrial grade) and EIPH Series (high-pressure grade) have different pressure ratings – verify operating pressure requirements carefully during selection.

• Complete order model should include: series code, displacement size, shaft type, flange type, design code.