Used 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. F, Approx 6.625" dia x 4' L. (28) .625 dia 316L stainless steel tubes rated for 150 PSI @ -60/320 Deg. F, Nozzles: Shell (2) 2", Tubes (2) 2".Serial # 1557, Year Built: 1999., Previous Service: V-911 Vent Condenser Multi-purpose, Estimated Weight: 500#