Specifications include, but are not limited to: Seattle City Light’s Units 51, 52 and 54 are 160MW vertical Francis turbines manufactured and installed by Nohab (Sweden) in 1967. The original runners and seal rings were replaced during overhauls conducted between 2000 and 2003 with parts supplied by Preussag-Noell. The currently installed seal rings are a weldment (vertical ring joined to a horizontal rolled plate) fabricated from AISI 321 stainless steel (CrNi 18.9 Ti – DIN standard) with an aluminum-bronze weld overlay. Seattle City Light plans to replace the existing upper and lower stationary seal rings during upcoming generator overhauls. See attached drawings for dimensions and details (SCL Drawings C8159 Rev. 2, and C8119 Rev. 3).