Used 20 Sq Ft Horizontal CS Shell & Tube Heat Exchanger. CS Shell rated 95 PSI @ 100 deg F. CS Tubes rated 75 PSI @ 100 deg F. Shell dia : 6.625" x 4'. (26) tubes, 3/4" dia x 4' L. Nozzles: Shell - (2) 2"; Tubes - (2) 1.5". Type BEM. Mfg by Doyle & Roth, 2003, S/N: S-1064, NB# 19680. Previous use: Styrene Exchanger. Weight: 400 lbs.