Used 160 sq ft 316 stainless steel shell and and tube heat exchanger. Manufactured by Exell Inc. 16" OD x 9' OAL. SA 106-B shell rated 200 psi @400F, (143) 3/4" OD 316 stainless steel tubes rated 172 psi @400F. National Board #1970, serial #868208. Weight 1750 lbs. Built 1998.