In August 2014 CompRex LLC (De Pere, Wisconsin) was awarded a contract to design, engineer, fabricate and test high pressure, diffusion bonded stainless steel heat exchanger for CO2 power cycle development. Today CompRex announces that they have passes a significant mile stone with the successful hydraulic pressure test of a fabrication demonstration unit representing the intended heat exchanger. A representative scaled-down unit was manufactured for pressure testing. Test results showed that the unit exceeded the expected burst pressure for the design.