EIPH2-006RK03-10 EIPH3-025RK23-10 Eckerle Internal Gear Pump High Pressure 400 bar

Product Overview

The EIPH2-006RK03-10, EIPH2-008RK03-10, EIPH3-025RK23-10, and EIPH3-032RK23-10 are high-pressure internal gear pumps from the ECKERLE EIPH series. Manufactured by the German original equipment manufacturer with over 60 years of internal gear pump experience, this next-generation EIPH series is specifically engineered to meet the rigorous demands of contemporary industrial hydraulics.

The EIPH series incorporates proven gap-compensated internal gear pump technology, featuring combined radial and axial pressure compensation along with the patented two-piece crescent seal design that delivers exceptional volumetric efficiency and long-term operational stability. The series supports multi-pump combinations to accommodate diverse system flow requirements.

Interchangeability: The EIPH series is manufactured to exacting ECKERLE original design standards. Mounting flange, shaft type, port dimensions, and rotation direction are fully compliant with genuine ECKERLE specifications, enabling 100% drop-in replacement without any system modification.

Technical Specifications 

EIPH2-006RK03-10

• Brand: ECKERLE (Germany)

• Series: EIPH2

• Displacement (Vth): 6.4 cm³/rev

• Continuous operating pressure: 330 bar

• Peak pressure (max. 10 sec, 15% duty cycle): 350 bar

• Maximum intermittent pressure: 400 bar

• Rated speed range: 400 – 3,600 rpm

• Maximum speed: 4,200 rpm

• Mounting flange: SAE B 2-bolt

• Rotation: Right-hand (clockwise)

• Thread standard: Metric

• Seal kit: NBR

• Shaft type: Ø20 mm

• Net weight: Approx. 5.0 kg

• Housing material: Cast iron

EIPH2-008RK03-10

• Brand: ECKERLE (Germany)

• Series: EIPH2

• Displacement (Vth): 7.9 cm³/rev

• Continuous operating pressure: 330 bar

• Peak pressure (max. 10 sec, 15% duty cycle): 350 bar

• Maximum intermittent pressure: 400 bar

• Rated speed range: 400 – 3,400 rpm

• Maximum speed: 4,000 rpm

• Mounting flange: SAE B 2-bolt

• Rotation: Right-hand (clockwise)

• Thread standard: Metric

• Seal kit: NBR

• Housing material: Cast iron

EIPH3-025RK23-10

• Brand: ECKERLE (Germany)

• Series: EIPH3

• Displacement (Vth): 24.8 cm³/rev

• Continuous operating pressure: 330 bar

• Peak pressure (max. 10 sec): 350 bar

• Maximum intermittent pressure: 400 bar

• Rated speed: 3,200 rpm

• Mounting flange: SAE B 2-bolt

• Rotation: Right-hand (clockwise)

• Thread standard: Metric

• Seal kit: NBR

• Shaft type: 25 mm

• Net weight: 11.2 kg

• Housing material: Cast iron

EIPH3-032RK23-10

• Brand: ECKERLE (Germany)

• Series: EIPH3

• Displacement (Vth): 32.1 cm³/rev

• Continuous operating pressure: 330 bar

• Peak pressure (max. 10 sec): 350 bar

• Maximum intermittent pressure: 400 bar

• Rated speed range: 400 – 3,000 rpm

• Maximum speed: 3,000 rpm

• Mounting flange: SAE B 2-bolt

• Rotation: Right-hand (clockwise)

• Thread standard: Metric

• Seal kit: NBR

• Shaft type: 25 mm

• Net weight: 11.9 kg

• Housing material: Cast iron

Key Technical Advantages

1. Patented Two-Piece Crescent Seal Design

The patented two-piece crescent seal design effectively enhances radial pressure compensation, significantly reducing internal leakage and maintaining excellent volumetric efficiency across the full operating pressure range.

2. Bidirectional Radial and Axial Clearance Compensation

Equipped with both radial and axial pressure compensation mechanisms, the pump automatically adapts to clearance variations under different operating pressures and fluid viscosities, ensuring stable volumetric efficiency throughout the entire service life (up to 95%).

3. Ultra-Low Noise Operation

Tested noise levels below 66 dB, significantly outperforming comparable products. Ideal for noise-sensitive work environments, contributing to a more operator-friendly workspace.

4. Extremely Low Pressure Pulsation (≤2%)

Pressure pulsation as low as 2% ensures stable system pressure and uniform flow output, effectively extending the service life of other hydraulic components (valves, actuators, etc.) and improving overall machine precision.

5. Wide Viscosity and Speed Range

Maintains efficient and stable operation across a viscosity range of 10–300 mm²/s and speeds from 400 to 4,200 rpm, accommodating everything from cold-start conditions to high-temperature continuous operation.

6. Flexible Multi-Pump Configurations

Supports multi-pump combinations with independent or common suction, accommodating diverse flow and pressure requirements for complex hydraulic systems.

Application Areas

• Injection Molding Machines – Delivers stable high-pressure oil supply for precise injection and clamping control

• Hydraulic Presses & Press Brakes – Meets continuous high-pressure, high-flow demands

• Servo-Hydraulic Energy Saving Systems – Enables on-demand oil supply when paired with servo motors, significantly reducing energy consumption

• Material Compactors – Provides stable high-pressure output ensuring compaction quality

• Pipe Crimping Machines (Tube Connector Clamping) – Precise crimping force control for reliable connections

• General Industrial Hydraulic Systems – Widely applicable to various stationary industrial hydraulic equipment

Expert Maintenance Tips

1. Fluid Cleanliness Management

EIPH series internal gear pumps are sensitive to fluid contamination. Recommended fluid cleanliness: ISO 4406 18/16/13 (NAS 1638 Class 9) or higher. Install a suction filter with minimum 100 μm filtration and a return line filter with 10 μm filtration.

2. Fluid Viscosity & Temperature Control

HLP 46 or equivalent hydraulic oil is recommended. Operating viscosity should be maintained within 10–300 mm²/s. Optimal operating temperature: 40–60°C. For cold starts, ensure fluid temperature is above -10°C to prevent cavitation due to excessive viscosity.

3. Suction Conditions

Ensure suction lines are properly sealed to prevent air ingress. Suction vacuum should not exceed 0.3 bar (absolute pressure). Recommended suction line flow velocity: 0.5–1.5 m/s.

4. Alignment During Installation

Ensure concentricity between pump shaft and drive motor shaft does not exceed 0.05 mm, with angular misalignment within 0.5°. Flexible couplings are recommended to compensate for minor misalignment.

5. First Start-Up

Before initial start-up, pre-lubricate the pump by filling clean hydraulic oil through the case drain port. Start with jog operation to verify correct rotation direction (standard EIPH2/EIPH3 configuration is right-hand/clockwise), then gradually load to operating pressure.

6. Periodic Maintenance

Replace hydraulic oil and filters every 2,000 operating hours or annually. Regularly monitor pump body temperature (surface temperature should not exceed 80°C) and listen for abnormal noise increases, which may indicate internal wear or cavitation.