Valavu yoyezera mafuta ndi chida chofunikira chomwe chimagwiritsidwa ntchito kuwongolera kuyenda kwamafuta. Nthawi zambiri amagwiritsidwa ntchito pamakina amafuta amgalimoto kapena makina ogawa mafuta m'mafakitale kuti atsimikizire kuyeza kolondola komanso kuwongolera mafuta.

Mfundo yogwiritsira ntchito valavu ya metering ya mafuta imachokera ku mfundo za makina amadzimadzi ndi ukadaulo wowongolera ma valve. Nthawi zambiri imakhala ndi valavu ndi chipangizo chowongolera. Valavu imakhala ndi chobowola chosinthika komanso njira yotsegulira ndi kutseka yowongolera kuyendetsa kwamafuta.

Pamene valavu ya metering ya mafuta ikugwira ntchito, mafuta amalowa mkati mwa valve kudzera mu chitoliro choperekera. Pokonza valavu ya valve, kutuluka kwa mafuta kumatha kuyendetsedwa bwino. Chipangizo chowongolera chimasintha kutsegulidwa kwa valavu molingana ndi zofunikira za dongosolo ndikupatsidwa magawo kuti zitsimikizidwe kuti metering yolondola yamafuta. Pamene mafuta amayenera kuyimitsidwa, chipangizo chowongolera chidzatseka kwathunthu valve ndikuletsa kutuluka kwa mafuta.

Mfundo yogwira ntchito ya valve metering valve imatha kuwongolera kuchuluka kwa mafuta posintha mawonekedwe a valve. Kubowola kwakukulu kumapangitsa kuti mafuta ambiri adutse mu valve, pomwe kabowo kakang'ono kamachepetsa kuyenda kwamafuta. Kutha kuwongolera bwino kayendedwe ka mafuta kumapangitsa ma valve owerengera mafuta kukhala gawo lofunikira pamakina ogawa mafuta.

Kuti zitsimikizire kulondola komanso kudalirika kwa mavavu a metering amafuta, ma valve ena owerengera mafuta amakhalanso ndi masensa ndi njira zoyankha. Zomverera zimatenga zenizeni zenizeni pakuyenda kwamafuta ndikuzitumiza ku gawo lowongolera. Chipangizo chowongolera chimafananiza ndi magawo omwe apatsidwa ndipo chimasinthidwa kutengera nthawi yeniyeni kuti chisungike metering yolondola yamafuta.

Mwachidule, valavu yamagetsi yamafuta ndi chipangizo chozikidwa pa mfundo za makina amadzimadzi ndi ukadaulo wowongolera ma valve, omwe amagwiritsidwa ntchito kuti azitha kuyendetsa bwino kayendedwe ka mafuta ndi metering. Mfundo yake yogwirira ntchito imachokerakusintha kwa valavu yoboola pakati, ndikukwaniritsa kuwongolera kolondola komanso kodalirika kudzerakuwongolera zida ndi masensa. Ma valve metering amafuta amatenga gawo lofunikira pamakina amafuta amgalimoto ndi mafakitale kuti awonetsetse kuti mafuta akupezeka ndi metering molondola.