EIPH2-005RK03-1X | Eckerle Gear Pump 5.4cc 330bar

Product Overview

The EIPH2 / EIPH3 / EIPH5 / EIPH6 Series Internal Gear Pumps are high-performance internal gear pumps from ECKERLE, the German manufacturer. 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 EIPH series is ECKERLE’s internal gear pump product line specifically developed for high-pressure heavy-duty applications, covering four sizes: EIPH2, EIPH3, EIPH5, and EIPH6. The series features radial and axial pressure compensation design with the patented two-piece eccentric gap-filling structure that enhances radial pressure compensation performance. Noise levels are below 66 dB， with pressure pulsation as low as 2%.

The EIPH2 series covers displacements from 3.5 to 25.2 cm³/rev, with continuous operating pressure of 330 bar and peak pressure of 350 bar. It is suitable for mobile hydraulics, industrial hydraulics, and the automotive industry.

EIPH2-005RK03-1X model code breakdown:

• EIPH2: EIPH2 series high-pressure internal gear pump

• 005: Nominal displacement – 5.4 cm³/rev

• R: Rotation direction – Right (clockwise)

• K: Shaft type – Cylindrical shaft

• 03: Mounting flange – SAE A 2-hole flange

• 1X: Additional configuration code

EIPH2-008RK03-11 model code breakdown:

• EIPH2: EIPH2 series high-pressure internal gear pump

• 008: Nominal displacement – 7.9 cm³/rev

• R: Rotation direction – Right (clockwise)

• K: Shaft type – Cylindrical shaft

• 03: Mounting flange – SAE A 2-hole flange

• 11: Additional configuration code

We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. All EIPH2 / EIPH3 / EIPH5 / EIPH6 series models offer 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 

EIPH2 Series General Specifications:

• Brand Series: ECKERLE EIPH2 Series

• Pump Type: Internal gear pump

• Displacement Range: 3.5 – 25.2 cm³/rev

• Continuous Operating Pressure: 330 bar

• Peak Pressure (max. 10s, 15% duty cycle): 350 bar

• Instantaneous Peak Pressure: 400 bar

• Pressure Pulsation: Approx. 2%

• Noise Level: Below 66 dB

• Pressure Compensation: Radial and axial pressure compensation

• Special Design: Two-piece eccentric gap-filling design

• Port Orientation: 180° (radial suction and pressure ports)

• Minimum Speed: 400 r/min

• Maximum Speed: 4200 r/min

• Fluid Media: HL, HLP mineral hydraulic oil (DIN 51524)

• Media Temperature: -20°C to +80°C

• Viscosity Range: 10 – 300 cSt

• Seal Material: Viton (FKM)

• Housing Material: Cast iron

EIPH2-005RK03-1X Specifications:

• Model: EIPH2-005RK03-1X

• Nominal Displacement: 5.4 cm³/rev

• Continuous Operating Pressure: 330 bar

• Peak Pressure (max. 10s): 350 bar

• Instantaneous Peak Pressure: 400 bar

• Flow Rate (@ 1450 rpm, 100 bar): 7.55 L/min

• Drive Power (@ 1450 rpm, 100 bar): 1.52 kW

• Input Torque (@ 1450 rpm, 100 bar): 8.91 Nm

• Maximum Speed: 4200 r/min

• Minimum Speed: 400 r/min

• Rotation Direction: Clockwise (R designation)

• Drive Shaft: Cylindrical Ø20 mm

• Mounting Flange: SAE A 2-hole flange, 82.55 mm centering diameter

• Suction Port: SAE ½” 3000 psi

• Pressure Port: SAE ½” 3000 psi

• Housing Material: Cast iron

• Seal Material: Viton (FKM)

• Weight: Approx. 4.9 kg

EIPH2-008RK03-11 Specifications:

• Model: EIPH2-008RK03-11

• Nominal Displacement: 7.9 cm³/rev

• Continuous Operating Pressure: 330 bar

• Peak Pressure: 350 bar

• Maximum Speed: 4200 r/min

• Flow Rate (@ 1500 rpm): 12 L/min

• Rotation Direction: Clockwise (R designation)

• Drive Shaft: Cylindrical shaft

• Mounting Flange: SAE A 2-hole flange

EIPH3 / EIPH5 / EIPH6 Series Specifications Overview:

• EIPH3 Displacement Range: 16.0 – 64.4 cm³/rev

• EIPH5 Displacement Range: 80 – 125 cm³/rev

• EIPH6 Displacement Range: 125 – 299.5 cm³/rev

• EIPH3/5/6 Continuous Pressure: Up to 330 bar

• EIPH3/5/6 Peak Pressure: Up to 350 bar

• EIPH Series Noise Level: 53 – 63 dB(A)

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 EIPH 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. Radial and Axial Pressure Compensation – High Efficiency with Long Service Life

The EIPH series features radial and axial pressure compensation design with segmented radial compensation, maximizing pump efficiency. Specially designed arc-shaped components with unique materials provide radial compensation, effectively reducing internal leakage and ensuring peak volumetric efficiency throughout the product’s lifecycle.

3. Ultra-Low Noise Operation (<66 dB) – Industry-Leading Quiet Performance

The EIPH series delivers noise levels below 66 dB, with some models as low as 53 – 63 dB(A). 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, machine tools, and precision machining facilities.

4. Extremely Low Pressure Pulsation (Approx. 2%) – Ensuring Smooth System Operation

The EIPH series features 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 servo energy-saving systems, injection molding machines, and die-casting machines where pressure and flow stability are critical.

5. Ultra-High Pressure Capability – 330 bar Continuous, 400 bar Peak

The EIPH series delivers continuous operating pressures up to 330 bar, peak pressures of 350 bar, and instantaneous peak pressures up to 400 bar. This ultra-high pressure capability makes it suitable for a wide range of heavy-duty industrial hydraulic applications, including die-casting machines, injection molding machines, bending machines, and press machines.

6. Wide Displacement Coverage with Flexible Mounting Configurations

The EIPH2 series covers displacements from 3.5 to 25.2 cm³/rev, the EIPH3 from 16 to 64 cm³/rev, the EIPH5 from 80 to 125 cm³/rev, and the EIPH6 from 125 to 299.5 cm³/rev. A wide variety of shaft types, mounting flanges (SAE A 2-hole, SAE B 2-hole, etc.), and port configurations are available for flexible adaptation to various industrial equipment.

Application Areas

• Injection Molding Machines—clamping and injection hydraulic systems, servo energy-saving systems

• Die-Casting Machines—injection and clamping hydraulic systems

• Bending Machines, Press Machines—high-pressure oil hydraulic machinery

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

• Machine Tools—hydraulic systems for machining centers, lathes, milling machines

• Mobile Hydraulics—electric forklifts, diesel forklifts

• Industrial Hydraulic Systems—hydraulic power units, manufacturing machinery, automation equipment

• Molding Machines—hydraulic systems

• Plastic and Rubber Injection Molding—industrial machinery

• Press Technology, Marine Engineering, Paper Industry—heavy-duty industrial applications

Expert Maintenance Tips

Model Code Verification (verify each element):

EIPH2 series model codes contain critical information. Before selection and installation, confirm the following:

• EIPH2: EIPH2 series high-pressure internal gear pump identifier.

• Three digits (e.g., 004, 005, 006, 008, 011, 013, 016, 019, 022, 025) : Nominal displacement– 005 = 5.4 cm³/rev， 008 = 7.9 cm³/rev.

• First letter (R/L) : Rotation direction – R = Clockwise， L = Counter-clockwise.

• Second letter (K, etc.) : Shaft type – K = Cylindrical shaft.

• Two digits (03, etc.) : Mounting flange – 03 = SAE A 2-hole flange, 82.55 mm centering.

• Suffix (e.g., 1X, 10, 11, etc.) : Additional configuration code – seal material, special options.

Verify Rotation Direction:

Confirm that the drive shaft rotation matches the direction code in the model – “R” indicates clockwise， “L” indicates counter-clockwise. Incorrect rotation will prevent pressure build-up and may damage internal gears and bearings.

Mounting Flange and Drive Shaft Matching:

The EIPH2 series features a SAE A 2-hole flange with 82.55 mm centering diameter and a cylindrical Ø20 mm shaft. Verify that the equipment-side flange type and shaft specification match the pump configuration before installation.

Port Orientation Confirmation:

The EIPH series features suction and pressure ports oriented at 180° radially. Confirm that port orientation matches piping layout during installation.

Suction Line and Fluid Requirements:

The EIPH series has high requirements for oil cleanliness. Recommended fluids are HL, HLP mineral hydraulic oil (DIN 51524), with viscosity range of 10 – 300 cSt and media temperature of -20°C to +80°C. Ensure the suction line is properly sealed with no air leaks and the suction filter is not clogged.

First-Start Priming Procedure:

After new pump installation or system overhaul, ensure the pump cavity is filled with oil 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.

Oil Cleanliness and Regular Maintenance:

Replace hydraulic oil and return filters every 1,000 operating hours or per equipment manufacturer recommendations. Using hydraulic oil with proper cleanliness will significantly extend pump service life. Regularly monitor pump body temperature—if it consistently exceeds +80°C, inspect the system cooling.