Used 2255 Sq Ft 304 Stainless Steel Shell and Tube heat exchanger. Manufactured by Perry Products Corp. Model FTSSX-46-2255. (2020) 3/4" 304 stainless steel tubes rated 75/FV @ 450F. Shell rated 75 PSI @ 450F. (2) 2" service nozzles, (1) 24" and (1) 36" process nozzles. National Board# 7039. Serial #B-7012. Built 2007.