Voith IPV IPNL Internal Gear Pump | IPV5-40-101 IPV6-125-470 | High Pressure Combination Pump

LIC Hydraulic’s Voith IPV and IPNL Series internal gear pumps represent the pinnacle of high-pressure efficiency and acoustic performance. Utilizing patented radial and axial pressure compensation, these pumps deliver steady performance up to 330 bar continuous pressure. We specialize in complex tandem configurations, such as the IPV5/40+IPV3/8 or IPV6/125+IPNL5/80, providing versatile multi-circuit outputs from a single drive shaft. Every unit is engineered for 100% Drop-in Interchangeability with original Voith units and undergoes 100% simulated load testing to guarantee peak volumetric efficiency, especially in modern energy-saving servo-hydraulic applications.

Technical Specifications (Bulleted List)

• Series Identification: IPV (High Pressure) / IPNL (Low-Medium Pressure)

• Example Configurations: IPV5-40 / IPV6-125 / IPV3-8 / IPNL5-80

• Nominal Pressure (IPV): 330 bar (33 MPa / 4785 PSI)

• Peak Pressure (IPV): 345 bar (34.5 MPa / 5000 PSI)

• Nominal Pressure (IPNL): 80 – 120 bar (Size dependent)

• Displacement Range: 3.5 cm³/rev to 250 cm³/rev

• Acoustic Level: 50 – 65 dB(A) (Ultra-quiet operation)

• Speed Range: 400 – 3600 RPM (Variable speed drive compatible)

• Compensation Tech: Patented radial & axial pressure balancing

• Housing Material: High-tensile Ductile Iron

Key Technical Advantages

• Minimal Pressure Ripple: Optimized involute gearing ensures smooth flow with virtually zero pulsation, significantly reducing system vibration and enhancing machine precision.

• Dual-Gap Compensation: The radial and axial compensation plates adjust automatically to operational pressure. This maintains a volumetric efficiency of ≥ 95% throughout the pump’s entire service life.

• Servo-System Ready: With low mass moments of inertia and high starting torque efficiency, these pumps are the ideal partner for EHS (Electro-Hydraulic Servo) systems, handling rapid accelerations and frequent start-stop cycles with ease.

• Multi-Stage Modularity: The through-drive architecture allows seamless tandem mounting of multiple IPV/IPNL stages, enabling customized flow distribution and simplified system design.

Application Areas

• Precision Manufacturing: Servo injection molding machines, high-precision forging presses, and CNC benders.

• Heavy Industry: Metallurgical plants, large hydraulic power units (HPUs), and paper mill machinery.

• Low-Noise Environments: Testing facilities, medical equipment drives, and noise-sensitive workshops.

Expert Maintenance Tips

• Suction Integrity: Internal gear pumps are highly susceptible to cavitation. Ensure the suction line is perfectly airtight and maintain an inlet pressure between -0.2 and +2 bar.

• Viscosity Management: For optimal compensation performance, use high-quality anti-wear hydraulic oil with a viscosity range of 20 – 46 cSt.

• Air Bleeding Protocol: During the initial startup of combination pumps, perform multiple “jog” starts and bleed air from the pressure ports until the fluid is bubble-free to prevent damage to the compensation plates.