TheAuxiliaryCommonGasOutlet(ACGO)portisusedtoprovidefreshgastoanauxiliarymanualbreathingcircuit.ItcomesundertheBreathingGasCircuit(BGC)manifoldinananesthesiadeliverysystemwitha nintegratedbreathingsystem.ACGOswitchdirectsthefreshgasflowthroughtheACGOportonthefrontofthesystem.OxygenconcentrationisdisplayedonthescreenwhentheventilatorissettoACGOmode.Are liefvalveinthemanifoldlimitsthefreshgaspressureattheACGOportto55kPa(8psi)at45l/min.ACGOprovidesaflexiblebreathingcircuitinadditiontoexisting,forspecificmedicalfunctioning.Theportismadeofbrasswhichishighlycorrosionresistant.Anelectrodepositednickelcoatingonacopper-basealloysubstrateisappliedontheportgivesbrightappearance.Finishingcontainslessthan0.1%byweightinhomogen ousmaterialforlead,mercury,andhexavalentchromiumandlessthan0.01%byweightinhomogenousmaterialforcadmium.