The 60 Series of sanitary shell-and-tube heat exchangers from Exergy Inc., Hanson, Mass., features a 163-tube bundle in 2.5-in. shells. The 316L stainless-steel exchangers come in 10, 15, and 20-in. tube lengths and have nickel-chromium, vacuum-brazed joints. Sanitary grade fittings are used and tube-side surfaces are electropolished. The heat exchangers meet cGMP/ANSI standards.