Used 94 sq. ft. vertical cylindrical graphite block heat exchanger. MFD by Carbone type PBC8DL-8PU-1-3. Serial # 11122, built 1998, NB# 1291. ASME code stamped. 185 psi @ 400 deg. F shell side, 100 psi & FV @ -20/+400 deg. F tube side. 1 pass axial, 3 pass radial block. Shell 15" dia. x 130 3/8" long. Openings: Tube side - 1-4", 1-2"; Shell side - 1-3", 2-1/2".