Cataract Steel’s F-Model Heat Exchangers are designed to provide customers with the unmatched corrosion resistance of fluoropolymer resins. All units are built to ASME Code Standards. Our product is built with a single pass design built with shell materials of either carbon or stainless steel. Shell Diameters range from 4”-14”. They are ideal for heating and cooling ultra-pure water, acids and other corrosive chemicals.