Dependable Rotor & Stator Set for Continuous Flotation Production GF flotation machines are built to run. The rotor and stator set is what decides how long they run between stops. This polyurethane set is moulded to the GF series profile, so a change-out is quick and the cell returns to full duty the same day. Made for continuous duty. Durable polyurethane keeps its profile through long production runs. Matched pair. Rotor and stator supplied together for the correct working