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IPH / IPC / IPV / IPVAP / IPVP Series Internal Gear Pumps
Q&A Product Introduction
Q: What are these pumps?
A: They are high-pressure internal gear pumps from two leading manufacturers:
- IPH Series: Japan NACHI (Nachi-Fujikoshi) – compact, high-efficiency, low-noise.
- IPC / IPV / IPVAP / IPVP Series: Germany VOITH – high-pressure, heavy-duty, low-pulsation.
Both are fixed-displacement hydraulic pumps for industrial & mobile machinery.
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Q: What models & displacements are included?
A:
NACHI IPH Series
- Sizes: 2, 3, 4, 5, 6
- Displacements: 3.5, 5, 6.3, 8, 10, 13, 16, 20, 25, 32, 40, 50, 64, 80, 100 cc/rev
- Multi-stage: IPH H/R 6/6/3-80/80/10 (triple pump: 80, 80, 10 cc/rev)
VOITH Series
- IPC (obsolete, replaced by IPV)
- IPV / IPVP / IPVAP: 3, 4, 5, 6, 7 sizes
- Displacements: 3.5, 5, 6.3, 8, 10, 13, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250 cc/rev
Q: What are the key technical features?
A:
Common
- Internal gear (involute short-tooth): low noise, low pulsation.
- Axial/radial gap compensation: high efficiency, long life.
- Quiet operation: 5–10 dB quieter than conventional pumps.
- High durability: for continuous heavy use.
NACHI IPH
- Max pressure: 30 MPa (300 bar)
- Compact aluminum/steel body
- Easy maintenance
VOITH IPV/IPVP
- Continuous pressure: 210–330 bar; Peak: 250–345 bar
- Extremely low pulsation (<1%)
- Heavy-duty cast iron
- Multi-flow configurations (single/dual/triple)
Q: What are the performance specs?
A:
| Item | NACHI IPH | VOITH IPV/IPVP |
|---|---|---|
| Displacement | 3.5–125 cc/rev | 3.5–250 cc/rev |
| Pressure (rated/max) | 21–25 MPa / 30 MPa | 21–33 MPa / 25–34.5 MPa |
| Speed range | 400–3600 rpm | 400–3600 rpm |
| Media | Mineral oil (ISO VG32–68) | Mineral oil (ISO VG32–68) |
| Temperature | −20°C to 80°C | −20°C to 80°C |
Q: What applications are they used for?
A:
- Industrial: Injection molding, die-casting, presses, machine tools.
- Mobile: Excavators, loaders, forklifts, construction machinery.
- Automation: Conveyors, lifts, hydraulic power units.
