EIPS2-005LD34-11 | Eckerle Gear Pump 5.4cc 250bar

Product Overview

The EIPS2 / EIPC3 / EIPC5 / EIPC6 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 EIPS2 series is one of ECKERLE’s flagship internal gear pump product lines, with displacements ranging from 5 to 25 cm³/rev. 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 EIPS2 series is specifically designed for mobile hydraulic applications, including electric forklifts, diesel forklifts, and gas-powered forklifts.

The EIPC series (EIPC3 / EIPC5 / EIPC6) are medium-to-high pressure internal gear pumps developed for industrial applications. The EIPC3 covers displacements from 20 to 64 cm³/rev， the EIPC5 covers 80 to 125 cm³/rev， and the EIPC6 covers 125 to 250 cm³/rev. Featuring aluminum alloy housings, they are specifically designed for industrial hydraulics requiring high pressure and high reliability.

Model Code Breakdown:

EIPS2-005LD34-11:

• EIPS2: EIPS2 series internal gear pump

• 005: Nominal displacement – 5.4 cm³/rev

• L: Rotation direction – Left (counter-clockwise)

• D34: Shaft and flange configuration code

• 11: Additional configuration code

• Material Number: 6000200013

EIPS2-005RK04-111:

• EIPS2: EIPS2 series internal gear pump

• 005: Nominal displacement – 5.4 cm³/rev

• R: Rotation direction – Right (clockwise)

• K04: Shaft and flange configuration code

• 111: Additional configuration code

EIPS2-005RD34-111:

• EIPS2: EIPS2 series internal gear pump

• 005: Nominal displacement – 5.4 cm³/rev

• R: Rotation direction – Right (clockwise)

• D34: Shaft and flange configuration code

• 111: Additional configuration code

We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. All EIPS2 / EIPC3 / EIPC5 / EIPC6 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 (Bulleted List)

EIPS2 Series General Specifications:

• Brand Series: ECKERLE EIPS2 Series

• Pump Type: Internal gear pump

• Displacement Range: 5.4 – 25.2 cm³/rev

• Continuous Operating Pressure: 250 bar

• Peak Pressure (max. 10s, 15% duty cycle): 320 bar

• Instantaneous Peak Pressure: 350 bar

• Noise Level: Below 66 dB

• Pressure Pulsation: Approx. 2%

• Pressure Compensation: Radial and axial pressure compensation

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

• Port Orientation: 180°

• Fluid Temperature Range: -40°C to +120°C

• Minimum Speed: 200 rpm

• Recommended Filtration: ISO 4406 class 20/18/15

• Fluid Media: Mineral hydraulic oil

EIPS2-005LD34-11 Specifications:

• Model: EIPS2-005LD34-11

• ECKERLE Material Number: 6000200013

• Nominal Displacement: 5.4 cm³/rev

• Continuous Operating Pressure: 250 bar

• Peak Pressure: 320 bar

• Instantaneous Peak Pressure: 350 bar

• Maximum Speed: 4200 rpm

• Rotation Direction: Counter-clockwise (L designation)

• Mounting Flange: 52mm direct mounting flange

• Shaft Type: 19.50 mm

• Seal Material: NBR

• Thread Standard: Metric

• Weight: Approx. 2.9 kg

EIPS2-005RK04-111 Specifications:

• Model: EIPS2-005RK04-111

• Nominal Displacement: 5.4 cm³/rev

• Continuous Operating Pressure: 250 bar

• Maximum Speed: 4200 rpm

• Rotation Direction: Clockwise (R designation)

EIPS2-005RD34-111 Specifications:

• Model: EIPS2-005RD34-111

• Nominal Displacement: 5.4 cm³/rev

• Continuous Operating Pressure: 250 bar

• Rotation Direction: Clockwise (R designation)

EIPC3 Series General Specifications:

• Brand Series: ECKERLE EIPC3 Series

• Pump Type: Internal gear pump (aluminum housing)

• Displacement Range: 20 – 64 cm³/rev

• Continuous Operating Pressure: 250 bar

• Peak Pressure (max. 10s): 320 bar

• Instantaneous Peak Pressure: 350 bar

• Operating Viscosity: 10 – 300 mm²/s

• Starting Viscosity: Up to 2000 mm²/s

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

• Maximum Inlet Pressure: 2 bar absolute

EIPC5 Series General Specifications:

• Brand Series: ECKERLE EIPC5 Series

• Pump Type: Internal gear pump (aluminum housing)

• Displacement Range: 80 – 125 cm³/rev

• Continuous Operating Pressure: 210 – 250 bar

• Peak Pressure: 230 – 300 bar

• Maximum Speed: 2500 – 3000 rpm

• Operating Viscosity: 10 – 300 mm²/s

EIPC6 Series General Specifications:

• Brand Series: ECKERLE EIPC6 Series

• Pump Type: Internal gear pump (aluminum housing)

• Displacement Range: 125 – 250 cm³/rev

• Continuous Operating Pressure: 140 – 250 bar

• Peak Pressure: 150 – 280 bar

• Maximum Speed: 2800 rpm

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 EIPS2 / EIPC 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 EIPS2 / EIPC series features radial and axial pressure compensation design, maximizing pump efficiency. Specially designed arc-shaped components with unique materials provide radial compensation, effectively reducing internal leakage and ensuring high volumetric efficiency across all operating conditions.

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

The EIPS2 / EIPC series delivers noise levels below 66 dB. 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 EIPS2 / EIPC 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. Wide Displacement Coverage with Flexible Mounting Configurations

The EIPS2 series covers displacements from 5 to 25 cm³/rev， the EIPC3 from 20 to 64 cm³/rev， the EIPC5 from 80 to 125 cm³/rev， and the EIPC6 from 125 to 250 cm³/rev. A wide variety of shaft types, mounting flanges (52mm direct mounting flange, SAE A 2-bolt flange, etc.), and port configurations are available for flexible adaptation to various industrial equipment.

6. 180° Port Orientation – Convenient Piping Connections

The EIPS2 / EIPC series features suction and pressure ports oriented at 180°, facilitating piping connections and system integration while reducing the number of pipe bends and minimizing pressure losses.

Application Areas

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

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

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

• Oil Hydraulic Machinery—hydraulic systems for various oil hydraulic equipment

• Electric Forklifts—hydraulic systems

• Diesel Forklifts—hydraulic systems

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

• Die-Casting Machines—injection and clamping hydraulic systems

• Molding Machines—hydraulic systems

• Mobile Hydraulic Equipment—hydraulic systems for various mobile equipment

Expert Maintenance Tips

Model Code Verification (verify each element):

EIPS2 series model codes contain critical information. Before selection and installation, confirm the following:

• EIPS2: EIPS2 series internal gear pump identifier.

• Three digits (e.g., 005, 008, 011, 013, 016, 019, 022, 025, etc.) : Nominal displacement – 005 = 5.4 cm³/rev， 022 = 22.2 cm³/rev。

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

• Second through fourth characters (e.g., D34, RK04, RD34, RA04, etc.) : Shaft and flange configuration code.

• Suffix (e.g., 10, 11, 111, 12S111, 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。 EIPS2-005LD34-11 is counter-clockwise rotation。 Incorrect rotation will prevent pressure build-up and may damage internal gears and bearings.

Mounting Flange and Drive Shaft Matching:

EIPS2 series offers multiple mounting flange options:

• 52mm direct mounting flange (e.g., EIPS2-005LD34-11)

• SAE A 2-bolt flange (e.g., EIPS2-022RA04-12)
  Verify that the equipment-side flange type and shaft specification match the pump configuration before installation.

Port Orientation Confirmation:

EIPS2 / EIPC series suction and pressure ports are oriented at 180°。 Confirm that port orientation matches piping layout during installation.

Suction Line and Fluid Requirements:

EIPS2 / EIPC series internal gear pumps have high requirements for oil cleanliness。 Recommended filtration is ISO 4406 class 20/18/15。 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.