Get current pricing for Redman Equipment, 420 Sq. Ft. Redman E 420 Sq Ft Ss Horizontal U-tube Shell & Tube Heat Exchanger. 304l-ss Shell Rated 75 Psi @ 125 Deg F. 304l-ss Tubes Rated 75 Psi @ 350 Deg F. 304l- . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: