Used 100 Sq Ft Alpha Laval Spiral Heat Exchanger, Model 1-C. Max Pressure 100 PSI At 350°F, Max Design Metal Temp. 20°F at 100 PSI, Head Material Sa-516-70, Thickness .95", Shell Material Sa-240,304, Thickness .105". Built 1995, S/N:21377, U-Stamp. 24" Diameter x 36" Overall Length.