Introduction of Kaplan turbine

The Kaplan turbine is an inward flow reaction turbine, which means that the working fluid changes pressure as it moves through the turbine and gives up its energy. Power is recovered from both the hydrostatic head and from the kinetic energy of the flowing water. The design combines features of radial and axial turbines. Its main parts usually include Blades, hub, main shaft, runner cone, rotating mechanism.
Kaplan turbines are now widely used throughout the world in high-flow, low-head power production. The Kaplan turbine was an evolution of the Francis turbine. Its invention allowed efficient power production in low-head applications that was not possible with Francis turbines. 
According to whether the runner blade is movable or not in operation, it is divided into two categories: axial movable-blade type and axial fixed-blade type.

Application scope
Application scope of heads: 10m~70m
Runner diameters: 2.0m~11.0m
Installable capacity: 500KW ~ 200000KW
Specific ratio speed: 200 ~ 850