Get current pricing for Allyn American, 18 Sq. Ft. Allyn Ame Approx 18 Sq.ft. Vertical Shell & Tube Heat Exchanger, Mfg. By Allyn America, Lug Mounted. 316l Stainless Steel Shell Rated For 150 Psi @ 320 Deg . Product Category: Process Equipment, Sub Category: Process Heat Exchangers: