EIPH2-019RK23-10 ECKERLE High Pressure Internal Gear Pump 330bar

Product Overview

Technical Specifications 

• Model Range: EIPH2-004 / 005 / 006 / 008 / 011 / 013 / 016 / 019 / 022 / 025
• Displacement Range: 3.5 cc/rev – 25.2 cc/rev
• Continuous Operating Pressure: 330 bar
• Peak Operating Pressure (10 sec, 15% duty cycle): 350 bar
• Maximum Instantaneous Pressure: 400 bar
• Pressure Pulsation: ≤2%
• Noise Level: ≤66 dB(A) (measured in sound chamber)
• Port Configuration: Suction and pressure ports at 90°
• Direction of Rotation: R = Clockwise (standard) / L = Anticlockwise
• Shaft End: K = Cylindrical with through-drive / A = Cylindrical / B = SAE splined
• Mounting Flange: 0 = SAE A 2-hole (Ø82.55mm) / 2 = SAE B 2-hole (Ø101.6mm) / 3 = Direct fixture
• Operating Viscosity: 10 – 300 mm²/s
• Starting Viscosity: ≤2,000 mm²/s
• Operating Temperature: -20°C to +100°C
• Medium Temperature Range: -40°C to +120°C
• Ambient Temperature: -40°C to +80°C
• Operating Medium: HL / HLP hydraulic oil per DIN 51 524 Part 1/2
• Filtration Requirement: ISO 4406 Class 20/18/15
• Design Life: ≥1×10⁷ load cycles against peak operating pressure

• Displacement Range: 20.0 – 64.4 cc/rev
• Continuous Operating Pressure: 250 bar
• Peak Operating Pressure: 280 – 320 bar (size-dependent)
• Nominal Speed Range: 100 – 3,900 rpm (size-dependent)
• Volumetric Efficiency: 93% – 95%
• Hydromechanical Efficiency: 91% – 93%
• Weight: 8.3 – 11.5 kg
• Housing Material: Aluminum alloy

• Displacement Range: 65.3 – 100.5 cc/rev
• Continuous Operating Pressure: 250 bar
• Peak Operating Pressure: 270 bar
• Maximum Speed: 3,000 rpm
• Volumetric Efficiency: 94% – 95%
• Weight: 11.5 – 13.5 kg

• Displacement Range: 125.7 – 249.9 cc/rev
• Continuous Operating Pressure: 140 – 250 bar (size-dependent)
• Peak Operating Pressure: 150 – 280 bar
• Maximum Speed: 2,200 – 2,800 rpm
• Weight: 27.5 – 54 kg

Key Technical Advantages

• Patented Two-Piece Eccentric Segment Radial Compensation: ECKERLE’s proprietary radial gap compensation system employs segmented crescent-shaped sealing elements that dynamically conform to the internal gear’s outer profile under pressure. Compared to conventional single-piece compensation designs, this two-piece architecture increases the effective radial sealing area by over 40%, dramatically reducing internal leakage at high pressure and maintaining volumetric efficiency above 92% even at the full 330 bar continuous rating.
• Adaptive Axial Gap Compensation System: The pump’s end cover integrates an elastomeric pressure seal that automatically loads the gear faces using discharge pressure, providing real-time axial clearance compensation. This self-adjusting mechanism eliminates efficiency degradation caused by gear face wear over time, ensuring stable volumetric output throughout the pump’s service life. Mean Time Between Failures (MTBF) exceeds 25,000 operating hours.
• Ultra-Low Pulsation & Noise Architecture: The internal gear meshing geometry, combined with optimized tooth count ratios, achieves pressure pulsation of ≤2% — substantially lower than the 8%–15% typical of external gear pumps. Sound pressure levels remain below 66 dB(A), creating a more comfortable operating environment while reducing hydraulic line vibration and fatigue-related failures.
• 90° Port Layout & Multi-Pump Modularity: The EIPH series features orthogonal suction and pressure port orientation for optimized piping routing in compact installations. All EIPH2/EIPH3 models support rapid assembly into duplex or multi-pump configurations via standardized bayonet connection kits, with options for independent or shared suction inlets — providing flexible solutions for multi-circuit hydraulic systems.
• Full Variable-Speed Drive Compatibility: Thanks to the gap compensation mechanism, ECKERLE internal gear pumps maintain high volumetric efficiency even at low speeds, with minimal sensitivity to viscosity changes and temperature fluctuations. This makes them inherently suited for servo-driven variable-speed systems, where pressure-holding operations at minimal RPM can achieve energy savings of 50%–70% compared to conventional constant-speed hydraulic systems.

Application Areas

• Injection Molding Machines: Servo-hydraulic power units for precision holding pressure and rapid mold closing sequences
• Metal Press & Stamping Equipment: Primary pump drives for shearing machines, press brakes, and punch presses
• Servo Hydraulic Systems: Paired with Siemens, Toshiba, and other international servo drives for energy-efficient variable-speed control
• Marine Engineering & Shipboard Hydraulics: Deck machinery, windlasses, and steering gear requiring high reliability
• Paper Industry: Hydraulic nip rolls and reel drum drives in paper machines
• Material Handling & Lifting: Container gantry cranes, elevators, and brake ventilator systems
• Power Generation & Wind Energy: Pitch control, yaw drives, and braking systems in wind turbines
• Test & Simulation Equipment: High-pressure hydraulic sources for material testing machines and fatigue test rigs

Expert Maintenance Tips

• Mandatory Pre-Start Priming: Before initial startup or after extended downtime, the EIPH2 pump must be filled with clean hydraulic oil through the drain port (L port) until the housing is completely full. This ensures formation of a protective oil film on gear faces and bearing surfaces. Dry starting will cause irreversible damage to gear end faces and side plates within seconds.
• Strict Fluid Cleanliness Control: ECKERLE specifies system filtration to ISO 4406 Class 20/18/15 or better. Install a high-pressure filter with β₁₀ ≥ 75 on the pump discharge line and a magnetic plug detector on the return line. Sample oil regularly for particle count analysis — replace filter elements immediately if contamination exceeds the target class by two levels.
• Suction Line Pressure Monitoring for VFD Applications: During acceleration and deceleration in variable-frequency drive operation, transient vacuum or pressure spikes may develop on the suction side. Install a pressure transducer (sampling rate ≥ 1 kHz) near the pump inlet to continuously monitor suction pressure. Ensure inlet pressure never drops below 0.8 bar absolute (0.6 bar during start-up) to prevent cavitation damage to gear surfaces.
• Installation Torque & Alignment Requirements: Mounting flange fasteners must be M8 DIN 912 socket head cap screws with DIN 433 plain washers, tightened to 25 ± 5 Nm. Shaft alignment between pump and drive motor should be within ≤0.05mm radial offset and ≤0.5° angular misalignment. Use flexible couplings to accommodate minor thermal expansion shifts.
• Multi-Pump Assembly Guidelines: When combining EIPH2 and EIPH3 units into duplex configurations, ensure all sections rotate in the same direction. The common suction manifold cross-sectional area must be at least 1.5× the sum of individual pump inlet port areas to prevent flow starvation and cavitation issues.