Heat Exchanger, Heat Dissipation Capacity for Water 270,000 BtuH, Heat Dissipation Capacity for Oil 28,000 BtuH, Total Surface Area 4.3 sq ft, Shell Outside Diameter 3 1/8 in, Tube Length 17 1/8 in, Shell Material Stainless Steel, Tube Material Stainless Steel, Number of Passes 4, Shell Maximum Pressure Rating 225 psig, Shell Maximum Operating Temperature 450 Degrees F, Tube Maximum Pressure Rating 150 psig, Tube Maximum Operating Temperature 450 Degrees F