Used KEMCO Krueger Engineering Single Pass Vertical Shell & Tube Heat Exchanger, Approximate 27.5 Square Feet. Carbon steel shell rated 100 psi at 250 degrees F., (24) 3/4" Diameter x 72" long 316 stainless steel tubes rated 50 psi & Full Vacuum at 400 degrees F. (2) 316L Stainless steel tubesheets, (1) SA 234 Chrome Moly Alloy head. Openings shell (2) 2", openings tubes (2) 2". Side lug mounts. National Board# 1431, serial# 85-102, built 1985.