Heat Exchanger, Heat Dissipation Capacity for Water 525,000 BtuH, Heat Dissipation Capacity for Oil 42,700 BtuH, Total Surface Area 9.1 sq ft, Shell Outside Diameter 5 1/8 in, Tube Length 18 3/4 in, Shell Material Brass, Tube Material Copper, Number of Passes 4, Shell Maximum Pressure Rating 300 psig, Shell Maximum Operating Temperature 300 Degrees F, Tube Maximum Pressure Rating 150 psig, Tube Maximum Operating Temperature 300 Degrees F, Fluid Compatibility Glycol, Oil, Steam, Water