APV 316 Stainless Steel Triple Tube (3.5/3/2.5) Heat Exchanger-10 tubes. Thickness: 0.642 in. Outer tube dimensions: 3.5 in. OD. x 18 ft. 9 in. L, total holding capacity: 57.84 gallons. Intermediate tube dimensions: 3 in. OD x 19 ft. 2 in. L, total holding capacity: 50.88 gallons. Inner tube dimensions: 2.5 in. OD. x 19 ft. 4 in. L, total holding capacity: 24.24 gallons. (2) Fisher Control Valves. Model: 54-24-588. S/N’s: 9611-123-7-3, 9611-123-7-1, Bench range: 11-15 psi, Body rating: 250, Body: Bronze, Trim: 316 SS. Frame dimensions: 16 ft. L x 1 ft. 6 in. W x 7 ft. 2 in. H. Inlets/outlets: (4) 2-1/2 in. dia. S-line fittings. Overall dimensions: 21 ft. 5 in. L x 3 ft. 6 in. W x 7 ft. 2 in. H.