Get current pricing for Doyle & Roth, 36 Sq.Ft. Doyle & Ro Doyle & Roth Model Vt261-3ve 36 Square Foot Vertical Heat Exchanger. Hastelloy C276 Tubes Rated 150 Psi/full Vacuum @ 347 Deg. F. 316l Stainless . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: