Used Alfa Laval Thermal Horizontal Spiral Heat Exchanger, 1865 Square Feet, Model 1-H. 304 Stainless steel product contact areas. Hot and cold side rated 150 psi at 20 to 220 degrees F. Carbon steel removable heads with 304L stainless steel clad. Openings (4) 6". Mounted on carbon steel saddles. National Board#15750, Serial#22005, Built 1995.