Questions and Answers
Our claims in relation to our Solid Body Vortex Pump technology and third party testing naturally lead to questions - all good scientific developments should. Some of the most common questions and our answers are below.
How do you know for sure your fixed speed Supa-Stelth pumps are more energy efficient than conventional pumps?
Our pumps have been independently tested against a wide range of global brands. For example, the Lowara ESHS 32-125/07/S25RSNA by Xylem Inc. is among the most efficient conventional pumps we’ve ever tested. It is rated at 750 watts, retails for around US $1,500 in Australia, and uses a high-grade three-phase IE4 motor. Its wire-to-water (WtW) efficiency measures at 37%. By comparison, our DWP800 (800 watts) achieves a WtW efficiency of over 50% using a standard motor and sells for around US $400. If paired with an IE4 motor, efficiency would increase by a further 6% or more. These results clearly demonstrate the superior efficiency of our Supa-Stelth pumps.
The high-speed versions of your pump sound impressive, but how do you know they will last?
High-speed turbo machinery is already a proven technology—gas turbines regularly operate at over 100,000 RPM, and other pump types run reliably at 20,000 RPM. Our high-speed pump is designed to operate mainly between 5,000 and 8,000 RPM. While this is higher than conventional centrifugal or mixed-flow pumps, it is well within safe engineering limits. Importantly, achieving similar performance with conventional technology would require seven or eight pumps in series or parallel. Our design delivers this performance in a compact, scalable form—an engineering breakthrough that is both practical and durable.
Why is your pump so quiet?
Conventional centrifugal pumps generate significant noise due to turbulent flow and pressure fluctuations as water impacts internal components such as diffusers, cutwaters, and volutes. These interactions create hydrodynamic vibration, cavitation, and sound — especially at high operating speeds.
The Supa-Stelth™ design eliminates these problems entirely. Instead of using diffusers or volutes, pressure is developed through pure centrifugal force within a smooth, high-speed vortex. The flowing water contacts only a small section of the casing — the vortex-forming surface — allowing exceptionally stable flow with minimal turbulence and zero cavitation.
This unique flow path dramatically reduces vibration and hydrodynamic noise, resulting in one of the quietest and most efficient pump designs ever tested in its class.
Are you prepared to loan sample pumps to manufacturers for independent testing?
Yes. We are open to providing sample pumps for comparative testing. No confidentiality agreement is required, as our technology is fully protected by patents.
Are your pumps already in production?
Yes. Hundreds of thousands of Supa-Stelth pumps have already been manufactured and sold in Europe by Koller Whirlpool CZ, in sizes ranging from 200 watts to 3 kW.
