Product Overview
The IPS 6-80 101 is a flagship model from Germany’s Voith IPS Series high-performance internal gear pumps, specifically developed for variable-speed drive and servo systems. Voith, a German family-owned enterprise founded in 1867, is a globally recognized industrial technology group. The IPS Series internal gear pumps are manufactured using fourth-generation internal gear pump production technology, renowned for high pressure, low pulsation, and high efficiency.
This unit belongs to the IPS 6 frame size (the IPS Series is available in five frame sizes: IPS 3, IPS 4, IPS 5, IPS 6, and IPS 7), with a displacement of 80.7 cm³/rev. The IPS Series features gap-compensated internal gear pump construction with radial and axial sealing-gap compensation, maintaining high efficiency across a wide speed range. This series is specifically optimized for variable-speed drive systems, where flow is regulated by varying motor speed rather than throttling valves – delivering significant energy savings.
Key Interchangeability Advantage: Our IPS Series internal gear pumps are manufactured to strict German Voith original design specifications, ensuring 100% direct interchangeability with original units. All mounting interfaces (SAE hole flange per ISO 3019-1), shaft configurations, and port connections (SAE J518 Code 61/62 flanges) are identical to the original product – no modifications required. Every pump undergoes 100% factory performance testing under simulated operating conditions, guaranteeing plug-and-play reliability with zero performance deviation.
Related Series Description:
The user’s query includes both IPS and IPV series:
IPS Series (IPS 3–7): Voith high-performance internal gear pumps, specifically designed for variable-speed and servo drive systems
IPV Series (IPV 3–7): Voith internal gear pump general-purpose series, sharing the same core technology platform as IPS
IPS 6-80 101 and IPV 6-80-101 represent the same pump body under different product line designations
Model Code Breakdown (based on Voith IPS/IPV Series designation rules):
IPS / IPV = Series: Internal Gear Pump
6 = Frame size (3 / 4 / 5 / 6 / 7)
80 = Displacement code (approx. 80.7 cm³/rev)
101 = Design/configuration code
Technical Specifications
IPS 6-80 101 / IPV 6-80-101
Product Series: Voith IPS / IPV Series Internal Gear Pump
Brand: Voith (Germany)
Pump Type: Gap-Compensated Internal Gear Pump, Fixed Displacement
Displacement: 80.7 cm³/rev
Continuous Operating Pressure: Up to 330 bar (model-dependent)
Peak Pressure: Up to 345 bar
Maximum Speed: 2400 – 3600 rpm (displacement-dependent)
Minimum Speed: 400 rpm
Flow Rate (@1500 rpm): 121.0 L/min
Pressure Pulsation: < 2%
Noise Level: < 66 dB(A) (DIN 45635)
Volumetric Efficiency: ≥ 93%
Direction of Rotation: Clockwise or Counter-Clockwise optional
Housing Material: Cast Iron
Seals: NBR
Mounting Flange: SAE Hole Flange (ISO 3019-1)
Port Connections: SAE J518 Code 61/62 Flanges
Mounting Position: Any
Inlet Pressure: 0.8 – 3 bar abs (0.6 bar abs short-term at start-up)
Recommended Fluid: HLP mineral hydraulic oils (DIN 51524)
Recommended Viscosity Range: 10 – 300 mm²/s
Maximum Start Viscosity: 2000 mm²/s
Fluid Temperature Range: -20°C to +80°C
Ambient Temperature Range: -20°C to +60°C
Filtration Requirement: ISO 4406 Class 19/17/14 (NAS 1638 Class 8)
Recommended Filtration: β₁₀ ≥ 100
Weight: Approx. 29.2 – 35 kg
Key Technical Advantages
1. Radial and Axial Gap Compensation for High Efficiency and Low Pulsation
The IPS Series features integrated radial and axial sealing-gap compensation. In the radial direction, gear chambers are sealed by gear meshing and the filler piece; in the axial direction, axial plates seal the pressure chamber with minimal clearance. This design minimizes internal leakage and volume losses, maintaining high efficiency across a wide speed range. Pressure pulsation is as low as < 2%, significantly reducing system vibration.
2. Specifically Designed for Variable-Speed Drive for Significant Energy Savings
The IPS Series is specifically developed for variable-speed and servo drive systems. Conventional hydraulic systems regulate flow through throttling valves, resulting in significant throttling losses. IPS systems, by contrast, vary motor speed based on actual hydraulic demand – fundamentally eliminating throttling losses. This design delivers remarkable energy savings in variable-speed applications such as injection molding machine servo systems.
3. Ultra-Low Pressure Pulsation (< 2%) and Low Noise Operation (< 66 dB(A))
Thanks to the optimized internal gear design and bidirectional gap compensation, the IPS Series delivers pressure pulsation of < 2% and noise levels below 66 dB(A) . Ultra-low pressure pulsation effectively reduces hydraulic system vibration, ensuring smooth equipment operation and extending the service life of other system components. The low-noise characteristic makes it particularly suitable for injection molding workshops, press brake facilities, and other noise-sensitive applications.
4. Excellent Pressure-Holding Capability at Low Speeds
A key feature of the IPS Series is its ability to maintain pressure at very low rotational speeds. After proper filling and ventilation, the pump can build pressure from zero speed. This characteristic provides a significant advantage in processes requiring extended pressure-holding periods, such as the holding phase in injection molding.
5. Wide Displacement Coverage and Flexible Configuration
The IPS Series offers five frame sizes (IPS 3 through IPS 7) with displacements covering 3.6 – 251.7 cm³/rev. Available in both clockwise and counter-clockwise rotation directions. Supports single, tandem, and multiple pump combinations. The extensive selection range and configuration options ensure precise matching to diverse application requirements.
Application Areas
Injection Molding Machinery: Injection molding machine servo systems, foaming machines – delivering stable, energy-efficient hydraulic power
Press Brakes and Presses: High-pressure CNC press brakes, hydraulic presses
Die Casting Machines: High-pressure die casting equipment
Lifting Equipment and Construction Machinery: Cranes, lifting platforms
Marine Industry: Marine hydraulic systems
Metallurgy and Mining: Rolling mills, continuous casting hydraulic systems
Baling Presses and Shears: Scrap baling, metal shearing equipment
Test Benches and Trenchless Equipment: Hydraulic test benches, trenchless construction equipment
Expert Maintenance Tips
1. Model Confirmation and Selection
IPS 6-80 101 and IPV 6-80-101 represent the same pump body under different series designations – both are identical in mounting interface and performance parameters.
The IPS Series is specifically designed for variable-speed and servo drive systems. For conventional fixed-speed applications, the IPV Series may be selected.
Verify operating pressure, flow requirements, and drive type during selection.
2. Pre-Installation Checks
Confirm pump rotation direction (clockwise or counter-clockwise) matches system drive direction.
Check mounting flange type (SAE hole flange, ISO 3019-1) for compatibility with system interface.
Confirm port connection specifications (SAE J518 Code 61/62 flanges) precisely match piping.
Never use hammer-driven installation – always use proper tools.
3. First Start-Up & Oil Priming
Prime the pump housing with clean hydraulic oil before first start-up; ensure suction line is fully filled – never run dry.
Inlet pressure must be maintained within 0.8 – 3 bar abs (0.6 bar abs short-term at start-up).
Recommended fluid: HLP mineral hydraulic oils (DIN 51524), viscosity range 10 – 300 mm²/s.
Maintain operating oil temperature within -20°C to +80°C.
Speed range: 400 – 2400 rpm.
4. Filtration & Fluid Cleanliness
System filtration should meet ISO 4406 Class 19/17/14 (NAS 1638 Class 8) or better.
Recommended filtration: β₁₀ ≥ 100.
Regularly monitor fluid cleanliness to prevent contaminants from accelerating gear and bearing wear.
5. Operating Monitoring
Continuous operating pressure must not exceed 330 bar; peak pressure must not exceed 345 bar.
The IPS Series is known for low noise and low pulsation – if abnormal noise or pressure fluctuation occurs, first check suction lines for leakage or blockage.
Regularly check torque on pump and piping connection bolts to prevent loosening from vibration.
