Get current pricing for Carbone, 794 Sq. Ft. Carbone 794 Sq. Ft. Vertical Graphite Cylindrical Block Heat Exchanger. Mfd By Carbone, Model Pb24-20pu-1-2, Built 2002. Shell Side: 100 Psi/fv @ 350 Deg . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: