These valves directly control the flow of water from the penstock pipes to a turbine. I have forgotten the name of the technician, but I remember him having a good sense of humour.
The centrally mounted turbine and the surrounding guide vanes are clearly visible. In the background the partly assembled genereator has been covered with a protective sheet.
The inlet from the penstock pipe to the turbine is on the left. The water passes through the butterfly valve before reaching the turbine. The turbine outlet is in the bottom mid centre. The driving shaft from the turbine to the generator is supported by a bearing between the two.
