A Kaplan turbine has adjustable runner blades and adjustable guide vanes which gives it advantage of operation under variable head and discharge. It is an axial-flow turbine, which means that the flow direction does not change as it crosses the rotor. LH Energy can offer both Horizontal and Vertical Kaplan turbines from head of 2.0m to 40m in range of 10kW to 25MW.

https://www.youtube.com/watch?v=0p03UTgpnDU