Used 812 Sq Ft 316L Stainless Steel Vertical Shell and Tube Heat Exchanger. Mfg Puget Equipment Co. (Div of JBL International). SA-516 Shell Rated 125@450F. (69) 316L SS 1.5"OD tubes rated 15PSI@450F. (4) Lug mounted. Serial #98300. National Board #4386. Built 1998. Weight 4500 lbs.