Get current pricing for Doyle & Roth, Doyle & Roth 500 Sq. 500 Sq. Ft. Doyle & Roth Vertical Stainless Steel Heat Exchanger. 304-ss Shell Rated 100 Psi @ 300f/-20f. Alloy 20 Tubes Rated 50 Psi @ 150f/-20f . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: