Used 51 sq.ft. vertical stainless steel U-tube heat exchanger. MFD Southern Heat Exchanger, 1987, NB stamped. CS Shell rated 100 PSI @ 300 deg F. 316L-SS Tubes rated 150 PSI @ 300 deg F. CS Heads. (32) Tubes, 3/4" dia x 8'L. Tema Type: BEU. Previous use: Recovery Chiller.