Bell & Gossett Shell and Tube Heat Exchanger. Model: SU107-2. Heating surface area: 101 sq. ft. 2-Pass. (76) 3/4 in. dia. x 83 in. L copper tubes. Design pressure tube side: 125 psi. Test pressure tube side: 250 psi. Design pressure shell side: 150 psi. Test pressure shell side: 300 psi. Design temperature tube & shell side: 375 °F. The “SU” Heat Exchanger is an instantaneous type, designed to heat liquids with steam. No space-wasting, expensive storage tank is needed. Inlets: (1) 3 in. dia. 4-bolt steam flange, (1) 2-1/2 in. dia. S-Line fitting. Outlets: (1) 2 in. dia. bevel fitting, (1) 2-1/2 in. dia. S-Line fitting, (1) 1/2 in. globe valve. Overall dimensions: 102 in. L x 28-1/2 in. W x 50 in. H.