Get current pricing for Doyle & Roth, 18 Sq.Ft. Doyle & Ro Doyle & Roth Vt861-3ve Vertical 18 Square Foot Heat Exchanger. Hastelloy C276 Tubes Rated 150 Psi/full Vacuum @ 347 Deg. F. 316l Stainless Steel . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: