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The Screw Turbine is a further development of the Screw Pump. Whereas the Screw Pump pumps the water up, in the Screw Turbine the water flows down. Archimedes screw generators are the technology we use. .. The European studies conclude that the Archimedean Screw turbine is indeed fish- friendly with no. Archimedean Screw turbines offer a uniquely flexible hydropower solution that can be installed at sites with a broad range of topographical.

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This system is located at the site of an old turbine, within the Dartmoor National Park, on the River Dart, a Salmonid river. This type of turbine is becoming increasingly popular for lower head sites. Installation costs can be significantly lower than comparable Kaplan or crossflow turbines.

This therefore makes these machines worth considering for fitting into existing weirs on main rivers. Archimedean screws are a new type of turbine in this country, and they have a number of advantages over conventional turbines.


Fish screening can be a stumbling block with many systems, and can contribute to both the capital costs and the ongoing costs. The usual need is to exclude all fish as far as reasonably possible — sometimes meaning screen mesh sizing of as little as 3mm is requested. This can make a conventional turbine unworkable, but with the slow turning Screw turbine it is possible to simply let the fish through.

Screw turbine

There are no trapping points for the fish and no pressure discontinuities which can upset them also. Installation can be relatively simple, and costs can tend to be lower on low head sites, for tufbine on the many river weirs which exist.

For more information on these machines visit www.

Ritz-Atro manufacture a range of Archimedean screw systems, their Turibne agent Mann Power Consulting offer a wide range of hydro-power services on sites suitable for such systems. The site is in the Dartmoor National Park, and construction took approximately four months.

Screw turbine – Wikipedia

Commissioning happened tkrbine Januaryusing innovative variable speed drive equipment from GP Electronics. To be the first choice for design and installation of viable, sustainable, long-lasting micro-hydro systems. To be recognised for the reliability, integrity and quality of our staff, products and services.


What are the Advantages? They require very little fish and debris screening Their installation costs can be lower than comparable Kaplan turbines They are mechanically simple — less to go wrong They have good visibility — people screq see the water generating the power Fish screening can be scree stumbling block with many systems, and can contribute to both the capital costs and the ongoing costs.

There are few moving parts, so less parts to get damaged and go wrong.

Archimedes’ screw

And unlike nearly all turbines, you can see the water doing the work. Click the pictures below to see the installation process. Design and coding by WrightCode.