Mack CSM 2010 - Exhaust Aftertreatment System

168Mack,EmissionsSolution
ExhaustAftertreatmentSystem
MACKSCRStandardSystemView
W2061423
1.SelectiveCatalyticReduction(SCR)Catalyst
2.AftertreatmentDEFDosingInjector
3.AftertreatmentDEFDosingUnit(ControlModule)
4.AftertreatmentDEFTank
DieselExhaustFluid(DEF)isareactantthat’skeytotheSCRprocess.It’sanontoxic,
ultra-puresolutionofureaandultra-purewater.Ureaisacompoundofnitrogenthatturns
toammoniawhenheated.Itisusedinavarietyofindustries,perhapsmostcommonlyas
afertilizerinagriculture.Theuidisnonammable,andisnotdangerouswhenhandled
asrecommended.However,itishighlycorrosivetocertainmetals,especiallycopperand
brass.ReadtheseparatesectionconcerningthehandlingofDEFsolution.