Umsebenzi wale valve yokukhangela yokuphakamisa kukuvumela ukuba i-medium ihambe kwicala elinye kuphela, kwaye imise ukuhamba kwelinye icala.Ngokuqhelekileyo, ivalve isebenza ngokuzenzekelayo.Ngaphantsi kwesenzo soxinzelelo lwe-fluid ehamba kwicala elinye, i-valve clack iyavula.Xa i-fluid igeleza kwicala elichaseneyo, itanki yokulungelelanisa isebenza kwisitulo sokulungelelanisa ngoxinzelelo lwe-fluid kunye nobunzima be-flap yokulungelelanisa ukunqumla ukuhamba.