Get current pricing for Doyle & Roth, 32 Sq.Ft. Doyle & Ro Doyle & Roth Model Vt861-3ve 32 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: