Imodeli yokusetyenziswa ihambelana ne-gasket yomnyango ongenamsindo kunye nomlilo, odibanisa imisebenzi yokukhusela umlilo kunye nokukhusela isandi. Ukongeza kumsebenzi weengcango eziqhelekileyo, iingcango zomlilo nazo zinomsebenzi wokuthintela ukusasazeka komlilo kunye nomsi, onokuthintela ukusasazeka komlilo ngexesha elithile kwaye uqinisekise ukukhutshwa kwabantu.