Since the VLH concept only addresses a relatively narrow range of heads and flow rates, it is perfectly well adapted to being totally standardized.
A range of machines provided in 5 diameters (3,150-3,550- 4,000- 4,500- 5,000 mm) has thus been designed.
The net head range addressed by the VLH concept extends from 1.5 to 3.4 m. (up to 4,5 m in customised reinforced version).
The reinforcing of the supporting structure has enabled to bring the acceptable net head up to more than 4.5 m for the three smallest models in the range.
The range of flow rates of the equipments extends from 10 to 27 m3/s, and the addition of several units on a same site enables considering very high total equipment flow rates.
This results in a range of power per unit from 100 to 500 kW (at the network level). It is estimated that below 100 kW, the expected profitability will not be achieved, and the studies performed up to now demonstrate that above 500 kW, it is more profitable to install several smaller machines rather than a single large one.