Penstocks and stoplogs are low pressure intake devices for channels, tanks and basins, and are usually wall-mounted. The normal position is the open one, they close when maintenance is required. To allow an easy handling, stoplogs are usually composed by several units that must be lift by a lifting beam and positioned one on top of the other to reach a level higher than the required water level. Its body is made by structural steel.
■ hydraulic power plants (gates)
■ low-pressure intakes in channels, tanks and
■ basins (penstocks and stoplogs).