Get current pricing for Doyle & Roth, 20 Sq. Ft. Doyle & R 20 Sq Ft Horizontal Cs Shell & Tube Heat Exchanger. Cs Shell Rated 95 Psi @ 100 Deg F. Cs Tubes Rated 75 Psi @ 100 Deg F. Shell Dia : 6.625 X 4& . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: