The BNZ Series of water oil coolers provide an efficient way to cool hydraulic fluid utilizing shell and tube technology. The design consists of an outer housing shell and a tube/fin bundle known as a "stack", which fits inside the shell. Hydraulic fluid to be cooled is circulated through the housing shell and passes across the cooling fins which transfers the heat to the cooling tubes in the stack. Cooling fluid, being typically water or water glycol, flows through the cooling tubes running through the stack to carry the absorbed heat away. This rugged design offers high heat removal in a compact package. A large variety of cooling capacity sizes, port options and material choices are available to tailor the optimum cooler to meet specific application needs. Lovejoy® Water-Oil Cooler, 2-Pass Shell and Tube Technology Temperature Control Unit, Series: BNZ Series, Specifications: 580 psi Maximum Operating Pressure Shell Side, 230 psi Maximum Operating Pressure Tube Side, 200 °F Operating Temperature, 59 gpm Maximum Flow Rate, 1-1/2 in NPT Oil Port, Size 80, 12.6 sq-ft Surface Area, 208 mm L Core, 323.003 cu-in, Painted, Black, 11.81 in L x 5 in W x 5.47 in H Dimensions