No Compromise When Pumping Wastewater
The S-tube impeller from Grundfos sets new standards for wastewater hydraulic design. This innovative channel impeller offers greater hydraulic efficiency than any other type of wastewater impeller, and doesn’t compromise free passage, which ensures trouble-free operation.
With the S-tube impeller, the efficiency is higher compared to other wastewater impellers, as there are no edges, dead zones, or cutting functions that get worn over time. Furthermore the S-tube impeller features an innovative and patented labyrinth and sealing system, for years of trouble-free operation.
The S-tube impeller offers the highest hydraulic efficiency and best-in-class non-clogging capabilities for optimum reliability and lowest life cycle costs.
- Efficiency: World class hydraulic efficiency without compromising free passage
- Free passage: Greater free passage means better solids handling and greater non-clogging capabilities
- Simplicity: A design as simple and robust as a tube results in longer lifetime and lower maintenance costs
The very nature of wastewater is challenging, with dry solids content varying over time. Similarly, water use has not remained static either. The S-tube takes on these challenges, making unnecessary the traditional trade-off between hydraulic efficiency and free passage that varying wastewater composition typically requires.
The S-tube impeller is a tube-shaped impeller in a pump housing that matches the tube shape through the entire pump. The simplicity of the S-tube impeller eliminates the need for advanced and costly add-on assemblies that in a static or dynamic way are designed to cut, shred or treat the wastewater as it flows through the pump.
Uniquely balanced for quiet, smooth operation
The difficulties in designing high-efficiency sewage impellers have traditionally been challenges with sealing, vibrations, abrasive wear and clogging. The Grundfos S-tube impeller meets and surpasses all these challenges.
A unique new method for balancing the impeller means less vibration and noise. Quiet and smooth operation is indicative of greater reliability, with longer lifetime for bearings, shaft seals and other components. The smooth design through the hydraulics ensures less abrasive wear and enhances the non-clogging capabilities, meaning reduced costs over time.
Picture: The S-tube impeller (Image: Grundfos)