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