Used 490 Sq Ft Horizontal CS U-Tube Heat Exchanger. CS Shell rated 150 PSI @ 200 Deg F. CS tubes rated 150 PSI @ 200 deg. F. Shell: 20" OD x 17' L (OAL - 17' 6"). (57-U's) 1" dia tubes X 16' L. Passes: Shell- 1, Tubes - 4. Nozzles: Shell - (2) 6", Tubes - (2) 3". Built by Killebrew Engineering, 1977, S/N: 32125, NB# 3615. Type BEU. Saddle Mounts. Previous use: Ammonia Cooler. Approx weight: 4285 lbs.