Get current pricing for Doyle & Roth, 50 Sq.Ft. Doyle & Ro Doyle & Roth Model Vt1061-3ve 50 Square Foot Vertical Heat Exchanger. Hastelloy C276 Tubes Rated Full Vacuum/150 Psi @ 347 Deg. F. 316l Stainless . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: