EIPC3-040RA23-10 Eckerle Gear Pump | 40cc 250 bar Internal Gear

Product Overview

The EIPC3-040RA23-10, EIPC3-050RA23-10, EIPC5-080RA, and EIPC6-125RA23-11 are representative models of the German ECKERLE EIPC series gap-compensated high-pressure internal gear pumps. ECKERLE is a global leader in internal gear pump technology with over 200 filed patents.

The EIPC series is ECKERLE’s fixed-displacement internal gear pump range developed specifically for industrial hydraulic applications. Featuring axial and radial gap compensation with radial compensation segments, the series delivers extremely low noise and extremely low pressure pulsation (approx. 2%) at continuous operating pressures up to 250 bar.

The EIPC series is available in three frame sizes: EIPC3, EIPC5, and EIPC6. EIPC3-040RA23-10 offers 40 cc/rev displacement, EIPC3-050RA23-10 offers 50 cc/rev; EIPC5-080RA offers 80 cc/rev; EIPC6-125RA23-11 offers 125.7 cc/rev. EIPC3 and EIPC5 feature aluminum alloy housings, while EIPC6 features a cast iron housing.

The EIPC series is widely used in injection molding machines, die casting machines, presses, lifting and conveying technology, plastics and rubber injection molding technology, and high-efficiency servo drive systems.

Engineered as a direct OEM-replacement solution for ECKERLE original products, these models fully comply with ECKERLE original design standards and SAE mounting interface specifications, offering 100% direct interchangeability. Every unit undergoes 100% workload simulation testing prior to shipment, rigorously validating pressure retention, volumetric efficiency, and internal leakage performance to meet or exceed OEM standards.

Model Code Breakdown (Bulleted List) :

EIPC3-040RA23-10 / EIPC3-050RA23-10

• EIPC — Series: ECKERLE Internal Gear Pump (Industrial Pump Series)

• 3 — Frame size: EIPC3 (small frame)

• 040 / 050 — Displacement code: 40 / 50 cc/rev nominal

• RA — Configuration code: Shaft type, mounting flange, etc.

• 23 — Design code

• 10 — Design series number

EIPC5-080RA

• EIPC — Series: ECKERLE Internal Gear Pump

• 5 — Frame size: EIPC5 (medium frame)

• 080 — Displacement code: 80 cc/rev nominal

• RA — Configuration code

EIPC6-125RA23-11

• EIPC — Series: ECKERLE Internal Gear Pump

• 6 — Frame size: EIPC6 (large frame)

• 125 — Displacement code: 125.7 cc/rev nominal

• RA — Configuration code

• 23 — Design code

• 11 — Design series number

Technical Specifications 

EIPC3-040RA23-10

• Model: EIPC3-040RA23-10

• Brand: ECKERLE (Germany)

• Series: EIPC3 Internal Gear Pump

• Displacement: 40 cc/rev

• Continuous Operating Pressure: 250 bar

• Peak Pressure: 270 – 300 bar (10 sec / 15% duty cycle)

• Maximum Speed: 3900 r/min

• Housing Material: Aluminum alloy

• Mounting Flange: SAE B 2-bolt flange

• Rotation Direction: Clockwise

• Seals: NBR

EIPC3-050RA23-10

• Model: EIPC3-050RA23-10

• Brand: ECKERLE (Germany)

• Series: EIPC3 Internal Gear Pump

• Displacement: 50.3 cc/rev

• Continuous Operating Pressure: 250 bar

• Rated Speed: 1800 r/min

• Maximum Speed: 3900 r/min

• Shaft Diameter: 25 mm

• Housing Material: Aluminum alloy

• Mounting Flange: SAE B 2-bolt flange

• Rotation Direction: Clockwise

• Seals: NBR

EIPC5-080RA

• Model: EIPC5-080RA23-10

• Brand: ECKERLE (Germany)

• Series: EIPC5 Internal Gear Pump

• Displacement: 80.4 cc/rev

• Continuous Operating Pressure: 210 – 230 bar

• Peak Pressure: 210 – 320 bar (10 sec / 15% duty cycle)

• Maximum Speed: 3000 r/min

• Flow Rate (@1500 r/min): 120 L/min

• Housing Material: Aluminum alloy

• Rotation Direction: Clockwise

• Shaft Type: Cylindrical shaft

EIPC6-125RA23-11

• Model: EIPC6-125RA23-11

• Brand: ECKERLE (Germany)

• Series: EIPC6 Internal Gear Pump

• Displacement: 125.7 cc/rev

• Continuous Operating Pressure: 250 bar

• Peak Pressure: 150 – 280 bar (10 sec / 15% duty cycle)

• Maximum Speed: 2800 r/min

• Shaft Diameter: 40 mm

• Weight: 27.3 kg

• Mounting Flange: SAE D 2-bolt flange

• Rotation Direction: Clockwise

• Seals: NBR

• Inlet Port: 2 1/2″

• Outlet Port: 1 1/2″

Key Technical Advantages

1. Axial & Radial Gap Compensation – High Volumetric Efficiency Throughout Service Life
The EIPC series features axial and radial gap compensation with radial compensation segments. This design ensures consistently high volumetric efficiency throughout the entire operating life, even under low-speed and low-viscosity conditions.

2. Ultra-Low Noise & Ultra-Low Pulsation Operation
The EIPC series is renowned for its extremely low noise and extremely low pressure pulsation. Pressure pulsation is only approximately 2%. Compared to external gear pumps or piston motors, the internal gear profile ensures significantly lower pulsation and noise, often eliminating the need for expensive sound insulation.

3. Superior High-Pressure Capability
EIPC3 series delivers continuous pressure of 250 bar with peaks of 270–300 bar; EIPC5 series delivers 210–230 bar continuous with peaks of 210–320 bar; EIPC6 series delivers 250 bar continuous with peaks of 150–280 bar. ECKERLE internal gear pumps withstand peak pressures up to 400 bar.

4. Flexible Multi-Pump Combination Capability
The EIPC series supports multi-flow combinations. Different displacement sizes within the same series can be flexibly combined into tandem or multiple pump configurations to meet the multi-circuit oil supply requirements of complex hydraulic systems.

5. Long Service Life & High Reliability
ECKERLE holds over 200 patents, and its internal gear pumps are renowned for outstanding efficiency and long service life. The robust gap-compensated construction with few moving parts ensures exceptionally long maintenance intervals.

6. Wide Speed Range – Adaptable to Multiple Drive Types
EIPC3 reaches up to 3900 r/min, EIPC5 reaches 3000–3600 r/min, and EIPC6 reaches 2200–2800 r/min. Suitable for both fixed-speed and variable-speed drives, including high-efficiency servo drive systems.

7. 100% Factory Tested & Direct Interchangeability
Every unit undergoes 100% workload simulation testing prior to shipment, covering pressure retention verification, internal leakage detection, and flow validation. Fully compliant with ECKERLE original design standards and SAE mounting interface specifications, with flange dimensions, shaft specifications, and mounting interfaces identical to OEM pumps—direct drop-in replacement with zero modifications required.

Application Areas

The EIPC series internal gear pumps are widely used in the following equipment and systems:

• Injection Molding Machines: Stable, low-pulsation hydraulic power for injection, clamping, and other processes

• Die Casting Machines: High-pressure, high-flow hydraulic systems

• Press Technology: Hydraulic systems for various press equipment

• General Machine Tools: Hydraulic systems for metal cutting and forming machinery

• Lifting & Conveying Technology: Lift platforms, conveyor equipment

• Plastics & Rubber Injection Molding Technology: Plastics and rubber processing equipment

• High-Efficiency Servo Drive Systems: Servo variable-frequency drive systems

• Paper Industry: Hydraulic systems for paper manufacturing equipment

• Wind Power: Wind turbine pitch control and braking systems

• Container Handling Equipment: Gantry cranes, hoists, elevators

Expert Maintenance Tips

1. Model Confirmation
EIPC3-040RA23-10 (40 cc/rev), EIPC3-050RA23-10 (50.3 cc/rev), EIPC5-080RA (80.4 cc/rev), and EIPC6-125RA23-11 (125.7 cc/rev) belong to different frame sizes and displacement ranges. Before installation, confirm the correct model based on system flow requirements and verify the complete model code on the pump nameplate.

2. Rotation Direction Confirmation
All standard models feature clockwise rotation (viewed from shaft end). Before installation, always verify that the PTO rotation direction of the host machine matches the pump’s rotation direction—incorrect rotation will result in pump failure to prime and may cause severe damage to internal components within a short period.

3. Installation Precautions

• Thoroughly clean the SAE standard mounting flange and shaft mating surfaces before installation to ensure no debris remains

• EIPC3 features SAE B 2-bolt flange

• EIPC6 features SAE D 2-bolt flange

• Use ECKERLE-specified torque values for mounting bolts—avoid over-tightening which may cause housing distortion

• Ensure correct connection of inlet and outlet ports

• The series supports multi-flow combinations—if connecting additional stages in series, verify through-drive specifications and mounting dimensions

4. First Start-Up and Bleeding

• Before first start-up, must fill the pump with hydraulic oil through the inlet port—never start dry

• After start-up, run at low speed with no load for 2–3 minutes to ensure complete air evacuation from the system

• Check for abnormal noise or leakage—internal gear pumps are particularly sensitive to cavitation

5. Fluid and Filtration

• Use high-quality anti-wear hydraulic oil compliant with DIN 51524 standards

• EIPC series test conditions: HLP 46 fluid, 50℃ temperature

• Operating temperature range: -20℃ to +100℃

• Maximum inlet pressure: 2 bar absolute

• Start-up viscosity: 2000 mm²/s

• Maintain system oil cleanliness to ISO 4406 18/15 or better

• Regularly replace return line filters to prevent contaminants from entering the pump

6. Periodic Maintenance

• Check mounting bolt torque every 1,000 operating hours

• Regularly monitor system operating pressure—EIPC3 not to exceed 250 bar (peak 270–300 bar); EIPC5 not to exceed 230 bar (peak 210–320 bar); EIPC6 not to exceed 250 bar (peak 150–280 bar)

• The EIPC series is known for long service life—nevertheless, regularly inspect shaft seals to prevent leakage

• If flow output decreases, noise levels increase abnormally, or system temperature rises excessively, inspect and replace worn components promptly