Heat Exchanger manufactured by Graham Mfg. Co. Inc. Botavia, NY *This was bought from Amoco Oil when they shut down their branch in Indiana. It is in great condition as you can see from the picture. ~Serial No. 69128-1, Date Built: 1988 MAWP F.V. / 75 PSIG 75 PSIG Test Pressure 115 PSI 115 PSIG Design Temp: 400 degrees F 150 degrees F ~National Board Certification # 5730 ~Certified by Atlas Mfg. Serial No. 7050 ~Min. Design Temp. -20 degrees F @ MAWP |