Get current pricing for Miller Exchangers, 13,397 Sq Ft Miller 13,397 Sq Ft Horizontal Stainless Steel U-tube Heat Exchanger. Carbon Steel Shell Rated 50 Psi @ 200 Deg F. 304l-ss Tubes Rated 75 Psi @ 300 Deg. . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: