Voith IPV & IPVP Internal Gear Pump IPV4 IPV5 IPV6 IPV 5-50

The severe-duty Voith Compatible IPV and IPVP Series High-Pressure Internal Gear Pumps (featuring global heavy-industry standard variations IPV 5-50 101, IPV 73-78, along with the comprehensive framework matrices IPV4 16, IPV5 32, IPV6 80 101, and IPV6 100 101), manufactured by Chengyuan Hydraulic, stand as premier fluid power generation cores engineered for 100% direct drop-in interchangeability within sophisticated servo-driven manufacturing networks, heavy metalworking machinery, and centralized Hydraulic Power Units (HPUs). Perfectly conforming to standard SAE 2-bolt or 4-bolt mounting patterns, standard cylindrical keyed shafts (or splined shafts), and SAE split-flange port geometries, this high-integrity configuration mirrors original Voith dimensional frameworks. Plant maintenance coordinators and system overhaul engineers can carry out seamless component retrofits on pre-existing motor bell housings with zero secondary modifications to existing couplings or hardline piping.

Operating as the primary power generation matrix inside eco-friendly electro-hydraulic servo circuits, internal gear pumps are highly regarded for delivering exceptional volumetric stability alongside near-silent acoustic performance. At Chengyuan, zero compromises are made regarding durability; 100% of our manufactured internal gear pumps clear our 100% rigorous dynamic simulation test bench criteria. Tested on high-precision digital servo test beds, each batch is subjected to continuous pressure spikes reaching nominal levels up to 31.5 MPa (315 bar) and intermittent peak thresholds up to 34.5 MPa. Our diagnostics actively monitor volumetric efficiency during extreme low-speed pressure-holding intervals (down to 100 rpm) as well as continuous dynamic acceleration intervals. This ensures long-term “low-pulsation, low-decibel, high-efficiency” service.

Technical Specifications

• Product Series Classification: IPV Series (Standard High-Pressure Single Pump) & IPVP Series (High-Pressure with Specialty Internal Adjustments/Trims)

• Maximum Continuous Operating Pressure: Nominal continuous rating up to 31.5 MPa (315 bar); Intermittent peak pressure capacity up to 34.5 MPa (345 bar)

• Permissible Operational Speed Velocity Window: Stable operating speed from 300 rpm to 3000 rpm (Supports short-duration pressure-holding intervals down to 100 rpm when driven by servo-synchronous motors)

• System Fluid & Cleanliness Limitations: High-grade HLP mineral-based anti-wear hydraulic oil; fluid filtration must match or exceed the ISO 4406 19/17/14 boundary

• Nomenclature Breakdown & Volumetric Parameter Grid:

  • Part Specification: IPV 5-50 101

    • Frame Geometry: IPV5 high-pressure casing group.

    • Displacement Index: 50.1 $cm^3/rev$.

    • Design Configuration 101: Standard right-hand (clockwise) rotation, standard cylindrical keyed shaft extension, matching SAE 2-bolt flange mount.

  • Part Specification: IPV6 80 101

    • Frame Geometry: IPV6 large-displacement high-pressure casing group.

    • Displacement Index: 80.5 $cm^3/rev$.

    • Design Configuration 101: Clockwise rotation, straight keyed shaft, widely chosen as the primary pump for high-capacity injection molding machinery.

  • Part Specification: IPV6 100 101

    • Frame Geometry: IPV6 large-displacement high-pressure casing group.

    • Displacement Index: 100.7 $cm^3/rev$.

    • Nominal Pressure Rating: 30 MPa (300 bar continuous).

    • Design Configuration 101: Clockwise rotation, utilizing high-volume SAE split-flange suction and delivery ports.

  • Part Specification: IPV4 16

    • Frame Geometry: IPV4 compact medium-flow casing group.

    • Displacement Index: 16.5 $cm^3/rev$.

    • Nominal Pressure Rating: 31.5 MPa; compact dimensions make it highly suitable as the rear section for multi-stage tandem pump groups.

  • Part Specification: IPV5 32

    • Frame Geometry: IPV5 series standard casing group.

    • Displacement Index: 32.6 $cm^3/rev$.

    • Nominal Pressure Rating: 31.5 MPa; frequently specified for high-pressure industrial shearing and heavy punching machinery.

Key Technical Advantages

• Micron-Level Radial & Axial Hydraulic Gap Compensation: The pump interior integrates a specialized floating gap-compensation design. By re-routing high-pressure fluid vectors to the back seal chambers of the side plates, the internal components maintain tight micron-level clearance against the gear faces. This approach sustains a high volumetric efficiency of over 95% at 315 bar while greatly reducing internal slip caused by normal component wear.

• Dual-Involute Pinion & Internal Gear Matching: The internal pinion and ring gear are machined from high-grade alloy steel via multi-axis gear hobbing, case-hardened, and finished through fine internal/external honing. The specialized optimized straight-to-involute teeth curves allow nearly zero-slip rolling contact during operation, eliminating oil trapping while keeping the pressure ripple under 2%.

• Exceptional Near-Silent Acoustic Boundaries: Thanks to the smooth fluid sealing transition across the long arc-shaped crescent segment, fluid transition from the suction zone to the high-pressure discharge zone is quiet and gradual. Under a nominal 1500 rpm full-load state, operating decibels are kept between 56 and 65 dB(A). This makes the pumps well-suited for servo-hydraulic systems with strict noise restrictions.

• Hydrodynamic Journal Bearing Architecture: Internally, shafts run on heavy-duty hydrodynamic journal bearings designed to generate a continuous fluid film across the journal surface using the system oil. The bearing alloys offer excellent anti-scuffing and self-lubricating properties, allowing them to support radial loads from high-pressure pulsations while remaining reliable during low-speed servo pressure-holding cycles.

Application Areas

Thanks to their stable flow output, low pulsation, and reliable high-pressure endurance, the IPV and IPVP series internal gear pumps are widely utilized across demanding industrial liquid power networks:

• Eco-Friendly Servo Injection Molding Machinery: Serving as the core power element in modern servo-driven injection molders, paired with synchronous servo motors for energy-efficient injection and clamping speed modulation.

• Heavy Hydraulic Presses & Metal Forming Equipment: High-output power units for die-casting machinery, CNC press brakes, high-cycle stamping presses, and heavy scrap scrap metal balers.

• Metallurgical & Paper Mill Infrastructure: Auxiliary rolling mill hydraulic circuits, and steady-state constant pressure drive systems for high-tonnage industrial paper processing lines.

Expert Maintenance Tips

• Always Prime the Pump Internals and Bleed Air Prior to Commissioning: Hydrodynamic journal bearings rely on immediate oil flow for lubrication and heat dissipation. After installation or an overhaul, manually pre-fill the pump internal chamber with clean hydraulic fluid through the suction or pressure port, and rotate the coupling several times by hand. Use short jogging starts on the motor, allowing the pump to idle under zero pressure for 2 to 3 minutes to clear trapped air before ramping up loading.

• Align Shaft Concentricity Strictly Within a 0.1 mm Margin: The pump shaft must be coupled to the electric motor using a high-quality flexible coupling. During installation, verify the alignment using a dial indicator, ensuring that radial and axial misalignment errors do not exceed 0.1 mm. Misalignment introduces severe offset loads onto the journal bearings, leading to premature shaft seal degradation or shaft fatigue failures.

• Secure Suction Lines Against Air Ingress to Prevent Cavitation: Because the crescent segment tolerances are highly precise, minor air leaks in the suction line can introduce micro-bubbles into the fluid. When these bubbles collapse under high pressure, they cause localized cavitation and elevated noise levels. Ensure all suction line connections use robust seals, and select a suction strainer with an appropriate mesh rating (typically 100 mesh) to avoid creating excessive vacuum restrictions.