Two different centrifuges designed at the Institute for Analytical Instrumentation RAS (St. Petersburg) and Vernadsky Institute of Geochemistry and Analytical Chemistry  RAS (Moscow) are considered. The main feature of both is the application of a flexible hollow shaft for realizing the planetary motion of the coil column and/or laying lines for liquids. This engineering solution has provided higher reliability and lower acoustic noise of planetary centrifuges. Thanks to the easy changing of the working parameters during the experimental run the planetary centrifuges can be used both for investigation of the hydrodynamic behavior of liquids in the coil columns and for development and/or optimization of the chromatographic procedures for separation of different substances.