Internal gear pumps for energy-efficient drives
Used in countless low-, medium- and high-pressure applications up to 420 bar peak pressure, hydraulic internal gear pumps from Voith ensure high volumetric and mechanical efficiency and low-pressure pulsation.
At nominal speed, the overall efficiency is often 5 to 10% better than comparable pumps available on the market, making it the ideal solution for constant and variable speed drives.
The pumps are available as:
- Single pumps
- Pump combinations (multi-flow pumps, multi-circuit pumps)
- Motor pump units
- Variable speed pumps
- Servo pumps
The main features at a glance
Our product portfolio
The IPS internal gear pump was developed for variable-speed drive applications. The performance range is up to 345 bar peak pressure and a maximum displacement volume of 252 cm³ per revolution.
Product data sheet
The IPV internal gear pump was developed for constant-speed drive applications. The performance range is up to 345 bar peak pressure and a maximum displacement volume of 252 cm³ per revolution.
Product data sheet
The IPVS internal gear pump was developed for constant-speed drive applications. The performance range is higher than the IPV pump and goes up to 420 bar peak pressure and a maximum displacement volume of 252 cm³ per revolution.
Product data sheet
The IPH internal gear pump was developed for special constant-speed drive applications. The performance range is up to 330 bar peak pressure and a maximum displacement volume of 126 cm³ per revolution.
Product data sheetVariable speed pumps and servo pumps
The future of hydraulics has arrived with variable speed pump systems. With these pumps, hydraulic systems are achieving a functionality never seen before. You save up to 70 percent more energy over conventional hydraulic systems. Noise emissions are also lower, in many cases by up to 20 db(A).
Variable speed pumps
Variable speed pumps in their simplest version are frequency-controlled. They consist of three main components:
- Variable frequency drive (VFD)
- Asynchronous motor
- Voith internal gear pump
Using a variable speed pump system is extremely simple. You provide us with all the machine or system cycle data. We then use this information to determine the necessary pressures and volume flows, and design the pump systems. The final pump solution you receive is a complete solution, as it is customized, ready to run, and all from a single source.
Servo pumps
For hydraulic systems that place high demands on control engineering, servo pumps are the perfect solution. The basic version of these pump systems also consists of three main components:
- Servo inverter
- Synchronous servo motor
- Voith internal gear pump
Servo pumps control the pressure or the volume flow. They precisely convert electrical energy into the hydraulic energy that is currently needed in the system. The classic use of valves for control can be either completely or partially omitted. This considerably simplifies every hydraulic system.
Total cost of ownership (TCO)
Energy efficiency
Comparison of plastics injection molding machines with different hydraulic systems
Cycle of a plastics injection molding machine:
| Pump | Fixed displacement pump |
| Drive motor | Constant speed asynchronous motor |
| Control modes | Using classic valves only |
| Energy consumption | 100 percent |
| Pump | Variable displacement pump |
| Drive motor | Constant speed asynchronous motor |
| Control modes | Partial use of classic valves |
| Energy consumption | 70 percent |
| Pump | Voith servo pump |
| Drive motor | Variable speed synchronous servo motor |
| Control modes | Partial or total servo pump control |
| Energy consumption | 30 percent |
Drives
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