Mixingequipmentmustbedesignedformechanicalandprocessoperation.Al-
thoughmixerdesignbeginswithafocuson processrequirements,themechanical
designisessentialforsuccessfuloperation.Usually,acompetentmanufacturerof
mixingequipmentwilltakeresponsibility forthemechanicaldesign.However,
processconditions,suchasimpelleroperationnearaliquidsurface,canimpose
severemechanicalloads.Similarly,theprocessenvironmentwillinfluencethe
selectionofamotorenclosure.Inmanywaystheprocessrequirementscanhave
adirectimpactonthemechanicaldesign.Inotherways,suchasthenatural
frequencyofamixershaft,appropriatemechanicaldesignmustbedetermined
bytheequipmentdesigner.Whateverthereason,knowledgeofthemechanical
requirementsforamixerwillhelpguidetheengineertowardadesignthatwill
meetbothprocessandmechanicalcriteria.1571
