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The major components of a Yankee dryer include the shell, heads, bearings, journals, steam and rotary joints, steam distribution pipes, center stay, grooves and ribs, soda straws, condensate headers, riser pipes, and the central steam collecting pipe. These components must be designed to provide methods for introducing steam to the inside of the Yankee, transferring heat to the sheet on the Yankee surface, and removing the condensate that forms. The design and operation of all of the major components will be described in this module.