Xa ukhetha kunye nokusebenzisa iimveliso ze-valve yokukhangela, kuyimfuneko ukuqonda ngokucacileyo umgaqo we-valve yokukhangela ukuze ukhethe i-valve yokujonga efanelekileyo kunye nokwandisa ubomi bayo benkonzo. Umgaqo wokusebenza wekhangela ivalve imi ngolu hlobo lulandelayo: ivalve yokukhangela ivumela ulwelo ukuba luhambe ngendlela ethile kwaye luthintele ulwelo ukuba lungabuyeli ngasemva okanye kwelinye icala. Iivalvu ezifanelekileyo zokukhangela kufuneka ziqale ukuvala xa uxinzelelo lwehla kumbhobho kwaye amandla e-kinetic e-fluid ehla. Xa ulwalathiso lokuhamba kwamanzi lubuyela umva, ivalve yokutshekisha kufuneka ivalwe ngokupheleleyo.