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Control Valve for Refi neries Emerson Process Management (Marshalltown, Iowa),


American Foundry Group (Bixby, Oklahoma), ExOne (North Huntingdon, Pennsylvania)


When traditional casting methods led to issues on the Fisher NPS 16 CL300 Vee-Ball rotary control valve body casting, Emerson contacted ExOne for equipment capable of converting the casting into digital 3-D printed molds.


To test this process, Emerson


selected a control valve body casting with a known high probability for rework to three suppliers using traditional casting methods and compared the results with that of the sand printed mold. Now,


orders for the Fisher NPS 16 CL300 Vee-Ball valve body are produced using 3-D printed molds. T e use of this methodology eliminated core fl oat, pre- vented shrink, and improved the surface fi nish of the casting.


Orders for the Fisher NPS 16 CL300 Vee-Ball valve body are now produced using 3-D printed molds. 28 | MODERN CASTING April 2017


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