Used 836 Sq. Ft. horizontal Shell & Tube Heat Exchanger. Mfr: WESTERN SUPPLY CO, S/N: E-4965. CS Shell rated 75 PSI @ 275 deg F, SS Tubes rated 150 PSI @ 250 deg F. (213) tubes 3/4" OD. 20' L x 18" dia shell. Shell: 1 Pass; Tubes: 2 Pass. Shell fittings: 6", Tube fittings: 6". Type AES. NB Stamped.