Used 986 sq. ft. Doyle & Roth shell and tube heat exchanger, 304 stainless steel shell, tubes, tube sheets and bonnets, rated 86 psi @ 60 degrees F shell side, 36 psi / full vacuum @ 95 degrees F tube side, (286) 1" diameter x 158" long tubes, 6 passes, 26" diameter shell, 16' 3" overall length, serial# J-7837-4, national board# 17149, built 1995.