Used Doyle & Roth VT861-3VE Vertical 18 square foot 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. Lug Mounted. Built 2000. S/N J92901, NB 19044. Plant Estimated Weight 221#