Used Doyle & Roth Model VT861-3VE 32 Square foot vertical heat exchanger. Hastelloy C276 tubes rated 150 PSI/full vacuum @ 2347 Deg. F. 316L stainless steel shell rated 150 PSI/full vacuum @ 347 Deg. F Lug Mounted. Built 2000. S/N J9290-8, NB 19065. Estimated Weight 297#