Voith Turbo Shell and Tube Heat Exchangers, Top Unit - Type L1 N1 11 15 13 K, Year 2002, S/N 7883, 12 in. ID 18 in. OD flange, Shell Side 152.29 psi Temp 130 C Vol. 20 Gallon, 462 total 3/8 in. tubes, Tube Side 152.29 psi Temp 70C Vol 17.44 Gallon, Bottom Unit - Type L1 N1 05 15 13 K, Year 2002, Serial 7899, 6 in.W x 86 in. L, Shell Side 152.29 PSI Temp 120C Vol 6.08 Gallon, Tube Side 152.29 PSI Temp 70C Vol 3.7 Gallon, Shell Medium Oil, Tube Medium Water, overall dimensions 88 in. L x 16 in. W x 55 in. H