Used Doyle & Roth Model VT261-3VE 36 square foot vertical heat exchanger. Hastelloy C276 tubes rated 150 PSI/full vacuum @ 347 Deg. F. 316L stainless steel shell rated 150 PSI/full vacuum @ 347 Deg. F. Built 2000. S/N J9290-1, NB 19068. Estimated Weight 350#.