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

Product Overview

The EIPS2 Series Internal Gear Pumps are high-pressure 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 high-pressure 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%.

EIPS2-005LD34-11 model code breakdown:

• 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

EIPS2-022RA04-12S111 model code breakdown:

• EIPS2: EIPS2 series internal gear pump

• 022: Nominal displacement – 22.2 cm³/rev

• R: Rotation direction – Right (clockwise)

• A04: Shaft and flange configuration code

• 12S111: Additional configuration code

EIPS2-022RD34-11 model code breakdown:

• EIPS2: EIPS2 series internal gear pump

• 022: Nominal displacement – approx. 22 cm³/rev

• R: Rotation direction – Right (clockwise)

• D34: Shaft and flange configuration code

• 11: Additional configuration code

EIPS2-013RK34-10 model code breakdown:

• EIPS2: EIPS2 series internal gear pump

• 013: Nominal displacement – 13.3 cm³/rev

• R: Rotation direction – Right (clockwise)

• K34: Shaft and flange configuration code

• 10: Additional configuration code

We specialize in the R&D and manufacturing of high-pressure pumps, motors, and valve groups. All EIPS2 series models offer 100% direct interchangeability with original ECKERLE EIPS2 series 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

EIPS2 Series General Specifications:

• Brand Series: ECKERLE EIPS2 Series

• Pump Type: Internal gear pump

• Displacement Range: 5 – 25 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

• Seal Material: NBR (standard)

• Fluid Media: Mineral hydraulic oil

• Port Orientation: 180°

• Compatible Equipment: Machine tools, injection molding machines, oil hydraulic machinery, construction equipment

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 (10s): 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

• Weight: Approx. 1.9 kg

• Seal Material: NBR

• Thread Standard: Metric

EIPS2-022RA04-12S111 Specifications:

• Model: EIPS2-022RA04-12S111

• ECKERLE Material Number: 6000200078

• Nominal Displacement: 22.2 cm³/rev

• Flow Rate (@ 1500 rpm): Approx. 33 L/min

• Continuous Operating Pressure: 250 bar

• Peak Pressure (short-term): 320 bar

• Maximum Speed: 3600 rpm

• Rotation Direction: Clockwise (R designation)

• Mounting Flange: SAE A 2-bolt flange

• Shaft Type: 20 mm

• Weight: Approx. 4.3 kg

• Seal Material: NBR

• Thread Standard: Metric

EIPS2-022RD34-11 Specifications:

• Model: EIPS2-022RD34-11

• ECKERLE Material Number: 6000200049

• Nominal Displacement: Approx. 22 cm³/rev

• Continuous Operating Pressure: 250 bar

• Peak Pressure: 320 bar

• Rotation Direction: Clockwise (R designation)

• Weight: Approx. 1 kg

EIPS2-013RK34-10 Specifications:

• Model: EIPS2-013RK34-10

• Nominal Displacement: Approx. 13.3 cm³/rev

• Continuous Operating Pressure: 250 bar

• Peak Pressure: 280 – 320 bar

• Rotation Direction: Clockwise (R designation)

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 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 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 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 machine tools, medical equipment, and precision machining facilities.

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

The EIPS2 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 precision equipment such as injection molding machines and die-casting machines where pressure and flow stability are critical.

5. High Pressure Capability – Withstands Heavy-Duty Industrial Applications

The EIPS2 series delivers continuous operating pressures up to 250 bar and peak pressures up to 350 bar. This high pressure capability makes it suitable for a wide range of heavy-duty industrial hydraulic applications, including die-casting machines, injection molding machines, and oil hydraulic machinery.

6. Wide Displacement Coverage with Flexible Mounting Configurations

The EIPS2 series covers displacements from 5 to 25 cm³/rev, offering a broad range of flow options. A wide variety of shaft types, mounting flanges, and port configurations are available for flexible adaptation to various industrial equipment. Suction and pressure ports are oriented at 180° for convenient piping connections.

Application Areas

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

• Injection Molding Machines—clamping and injection hydraulic systems

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

• Construction Machinery—hydraulic systems for small construction equipment

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

• Die-Casting Machines—injection and clamping hydraulic systems

• Test Benches—hydraulic testing systems

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 (005/013/022, etc.) : Nominal displacement – 005 = 5.4 cm³/rev, 013 = 13.3 cm³/rev, 022 = approx. 22 cm³/rev.

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

• Second through fourth characters (e.g., D34, A04, K34, etc.) : Shaft and flange configuration code.

• Suffix (e.g., 10, 11, 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, while EIPS2-022RA04-12S111 is 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 (EIPS2-005LD34-11)

• SAE A 2-bolt flange (EIPS2-022RA04-12S111)

Verify that the equipment-side flange type and shaft specification match the pump configuration before installation.

Port Orientation Confirmation:

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

Suction Line and Fluid Requirements:

EIPS2 series internal gear pumps have high requirements for oil cleanliness. Use hydraulic oil with proper cleanliness. 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.