Uhlelo lokuhlinzeka ngamanzi omlilo wePurity PVK luhlanganisa ukulula, ukusebenza kahle, kanye nokusebenza kahle kwezindleko nezici ezithuthukisiwe ezifana nokushintshwa kwamandla okubili. Izinketho zayo zepompo eziguquguqukayo kanye nethangi lokucindezela le-diaphragm elihlala isikhathi eside likwenza kube yisinqumo esihle sokuqinisekisa ukutholakala kwamanzi omlilo okuthembekile nokusebenzayo ezindaweni ezihlukahlukene.