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Screw turbine

Screw turbine

Screw turbine

The screw turbine, also known as Archimedes' screw, is a volumetric turbine that exploits the principle of gravity to generate electricity using low and very low water head otherwise not exploitable with traditional turbines.


The turbine is mainly composed of:

  • screw, consisting of a central tube and metal coils
  • gearbox
  • generator
  • electrical panels



  • Possible operation at variable speed in the case of non-constant water flows
  • Constructive simplicity that determines an easy operation and maintenance
  • Relatively large debris can pass, so it does not need a screening system
  • Low rotation speed and large flow
  • The fish fauna has the possibility to cross the screw towards the valley without being damaged
  • Civil engineering structures and simplified foundations

We can design and install screws with a head from 1.5 to 4 meters and from 1000 to 5000 liters per second of water flow rate.