Used Alfa Laval Thermal Plate Heat Exchanger, 674 Square Feet, Model M15-FFD. (103) 0.6 mm thick 304 stainless steel plates. Designed 250 psi at -20 to 200 degrees F. Mounted on expandable frame. Openings (2) 6", (2) 4". Serial# 3010496547. National Board# 13769. Built 1998.