Product Overview
The EIPH2-019RK03-11 is a representative model of the German ECKERLE EIPH2 series high-pressure internal gear pumps. ECKERLE is a global leader in internal gear pump technology with over 200 patents, having established an outstanding technical reputation in the global hydraulics industry since its founding in 1935.
The EIPH2 series belongs to ECKERLE’s high-pressure internal gear pump product line (EIPH = High-Pressure Internal Gear Pump), with displacements ranging from 3.5 to 25.2 cc/rev. Featuring axial and radial gap compensation with radial compensation segments, the series delivers continuous operating pressures up to 300 bar.
The EIPH2-019RK03-11 offers a theoretical displacement of 19.3 cc/rev. It features an SAE A 2-bolt flange (pilot diameter 82.55 mm), a 20 mm cylindrical shaft with a 6 mm parallel key, clockwise rotation, and NBR seals. The net weight is 7.4 kg.
Engineered as a direct OEM-replacement solution for ECKERLE original products, the EIPH2-019RK03-11 fully complies 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 :
EIPH — Series: ECKERLE High-Pressure Internal Gear Pump
2 — Frame size: EIPH2 (small frame, displacement 3.5–25.2 cc/rev)
019 — Displacement code: 19.3 cc/rev
RK — Configuration code (shaft type, seals, etc.)
03 — Design sequence code
11 — Design version number
Technical Specifications
Model: EIPH2-019RK03-11
ECKERLE Material No.: 6000200226
Brand: ECKERLE (Germany)
Series: EIPH2 High-Pressure Internal Gear Pump
Theoretical Displacement: 19.3 cc/rev
Maximum Continuous Operating Pressure: 300 bar
Peak Pressure (Short-term): Approx. 325–330 bar
Maximum Speed: 3000 r/min
Minimum Speed: 400 r/min
Flow Rate (@1500 r/min): Approx. 29 L/min
Rotation Direction: Clockwise (viewed from shaft end)
Mounting Flange: SAE A 2-bolt flange, pilot diameter 82.55 mm
Shaft Type: Cylindrical shaft Ø20 mm with 6 mm parallel key
Inlet Port: 1″ (SAE)
Outlet Port: 1/2″ (SAE)
Seals: NBR
Net Weight: 7.4 kg
Housing Material: High-strength aluminum alloy / Cast iron (depending on configuration)
Compatible Fluids: Hydraulic oil (HLP, HFC, HEES, etc.)
Circuit Type: Open circuit
Noise Level: < 66 dB
Pressure Pulsation: < 2%
Key Technical Advantages
1. Axial & Radial Gap Compensation – High Efficiency Throughout Service Life
The EIPH2 series features axial and radial pressure compensation with a patented two-piece eccentric gap-filling design that enhances radial pressure compensation effectiveness. 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 ECKERLE EIPH series is renowned for its extremely low noise and extremely low pressure pulsation. Noise levels are below 66 dB, with pressure pulsation below 2%. Compared to external gear pumps or piston motors, the internal gear profile ensures significantly lower pulsation and noise.
3. Superior High-Pressure Capability
Continuous operating pressure of 300 bar with peak pressures of 325–330 bar. ECKERLE internal gear pumps withstand peak pressures up to 400 bar. High-strength materials and precision machining ensure long-term stability under high-pressure conditions.
4. 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.
5. Flexible Configuration Options & Wide Adaptability
The EIPH2 series offers displacements from 3.5 to 25.2 cc/rev. Multiple shaft types (cylindrical, splined), flange types (SAE A/B), and seal materials (NBR/FKM) are available. Suitable for both fixed-speed and variable-speed drives, including servo variable-frequency drive systems.
6. Standard SAE Interfaces – 100% Direct Interchangeability
Features SAE A 2-bolt flange (pilot diameter 82.55 mm) and SAE standard ports (1″ inlet / 1/2″ outlet). Fully compliant with ECKERLE original design standards, offering 100% direct interchangeability with OEM pumps—zero modifications required.
Application Areas
The EIPH2-019RK03-11 internal gear pump is widely used in the following equipment and systems:
Injection Molding Machines: Stable, low-pulsation hydraulic power for injection and clamping processes
Die Casting Machines: High-pressure, high-flow hydraulic systems
Servo Energy-Saving Systems: High-efficiency servo drive 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 Processing Machinery
High-Pressure Hydraulic Machinery
Expert Maintenance Tips
1. Model Confirmation
The EIPH2-019RK03-11 offers 19.3 cc/rev displacement within the EIPH2 frame size. The EIPH2 series also includes 004, 005, 006, 008, 011, 013, 016, 019, 022, and 025 displacement options. Before installation, confirm the correct displacement based on system flow requirements and verify the complete model code on the pump nameplate along with the ECKERLE material number (6000200226).
2. Rotation Direction Confirmation
This model features 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 A 2-bolt flange (pilot diameter 82.55 mm) and 20 mm cylindrical shaft (with 6 mm parallel key) mating surfaces
Use ECKERLE-specified torque values for mounting bolts—avoid over-tightening which may cause housing distortion
Ensure correct connection of inlet and outlet ports—inlet 1″, outlet 1/2″
This series is suitable for variable-speed drive applications
The suction line should be short and straight to avoid restrictions and bends, preventing cavitation
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 (HLP mineral oil)
Test conditions: HLP 46 fluid, 50℃ temperature
Speed range: 400 – 3000 r/min
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—not to exceed 300 bar rated pressure (325–330 bar peak)
The EIPH 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
