Get current pricing for Carbone, Carbone 217 Sq, Ft. 217 Sq. Ft. Vertical Cylindrical, Graphite Block Heat Exchanger. Mfd By Carbone, Model 1680-626-25,type Bem. Serial # 111172, Nb# 1328, Built 1999. As . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: