Ivalvu
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I-valve yensimbi engagqwali yensimbi ephonswe
I-valve iyisici sokulawula ohlelweni lokulethwa koketshezi lwamapayipi. Isetshenziselwa ukushintsha ingxenye yesiteshi kanye nesiqondiso sokugeleza okuphakathi. Inemisebenzi yokuphambukisa, ukusika, ukugoqa, ukuhlola, ukuvala noma ukukhulula ukucindezeleka okuchichimayo.