Get current pricing for Karbate, Karbate 0 Sq. Ft She Sq. Ft. Karbate Brand Graphite Heat Exchanger. Shell Rated 100 Psi @ 320 Deg , Tubes Rated 100 @ 320 Deg F. Grade K22-14, Size 8-72. Serial # 4-84 . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: