Four Blade Kaplan Turbine Runner for Low Head Stations This Kaplan runner is built for low head hydropower stations that need a drop in replacement without reworking the existing draft tube and distributor. The hub and four blades are cast in stainless steel ZG06Cr13Ni4Mo, then machined to the dimensions recovered from an on site 3D scan of the original runner, so the blade to runner chamber clearance stays within the design range after installation. Product Parameters Item