Ivalve yeplastiki yobhedu yobhedu luhlobo oluqhelekileyo lwevalve ebandakanya izinto zobhedu kunye nesiseko seplastiki. Isetyenziswa ikakhulu ukulawula indlela yokuhamba kolwelo okanye irhasi kumbhobho nokuthintela ukubuya umva okanye ukubuya umva.
I-Brass yinto esemgangathweni ophezulu kunye nokumelana nokugqwala okulungileyo kunye namandla, anokugcina ukusebenza okuzinzileyo phantsi kweemeko ezahlukeneyo zokusebenza. Undoqo wevalvu yeplastiki yenziwe ngeeplastiki zobunjineli ezikumgangatho ophezulu, ezinokutywinwa kakuhle kunye nokumelana nokubola, kwaye inokuqinisekisa ukutywinwa kunye nokuzinza kwevalve.
I-valve yokutshekisha inesakhiwo esilula, ukufakwa okulula kunye nokugcinwa, ixesha lokugcina kunye neendleko zabasebenzi.
Iivalvu zeplastiki ezingundoqo zobhedu zisetyenziswa kakhulu kushishino, ulwakhiwo, unikezelo lwamanzi oluntu kunye neenkqubo zokuhambisa amanzi, njl. njl., kwaye zingasetyenziselwa ukuthintela ukuphuma kwamanzi ngasemva, ukubuya umva kwerhasi, njl. njl., nokuqinisekisa ukusebenza okuqhelekileyo kwenkqubo yemibhobho.