Used 745 sq ft stainless steel shell and tube heat exchanger. Manufactured by Pfaudler. Shell rated 100 psi @250F. (488) 1" O.D 316 stainless steel tubes, rated 100 psi @250F. 32" OD x 127 1/2" Length. Weight 4465 lbs. National Board #46860. Serial #R392-1806. Built 1992.