Chester-Jensen Co Plate Heat Exchanger. Model: HMC 63. S/N: 11722304. Design pressure max: 100 psig. 316 Stainless steel plates: (170). Section 1: (108) plates; Section 2: (62) plates. Heat transfer surface area: 493 sq. ft. Fixed end ports: (4) 2-1/2 in. Movable end ports: (4) 2-1/2 in. Divider ports: (3) 2 in. Overall dimensions: 90 in. L x 25 in. W x 70 in. H. This unit came from Middlefield Cheese in Ohio. Running 7000 H/W of cheese milk 40 ° - 113 °F; 113° - 165 °F and 165 ° - 192 °F. (ACN459 with spindle assist), (ACN370w/o spindle assist).