Get current pricing for Doyle & Roth, Doyle & Roth 192 Sq. 192 Sq. Ft. Horizontal Monel 400 Tubes, Tube Sheets And Heads, Steel Shell, Heat Exchanger. Mfd By Doyle & Roth, Serial # J-8473-1, Nb# 17890, Built 1 . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: