APV model R55 plate and frame heat exchanger

APV model R55 plate and frame heat exchanger, serial number 18611, three zones with regeneration blocks and a total of 78 each type 316SS plates, 2" threaded ports, with hot hold loop and hot water set, originally designed for sterilizing 15,000 pounds per hour of orange juice and apple juice, all engineering drawings on file, stainless steel contact, mild steel frame.