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Valavu ya mpira wamkuwa, gawo lotsegulira ndi lotseka (mpira) limayendetsedwa ndi tsinde la valavu ndipo limazungulira kuzungulira shaft ya mpira.Itha kugwiritsidwanso ntchito pakuwongolera ndi kuwongolera kwamadzimadzi, pomwe mphamvu yakumeta ubweya pakati pa valavu ya mpira wooneka ngati V ya valavu yosindikizidwa yolimba yooneka ngati V ndi mpando wakumtunda wa carbide metal valve ndi yayikulu, makamaka yoyenera media yomwe ili ndi ulusi, chabwino. particles olimba, ndi zina zotero. Mu payipi, valavu ya mpira wamitundu yambiri sangathe kusinthasintha mosavuta kusinthasintha, kusokoneza ndi kuyendetsa kayendedwe ka sing'anga, komanso kutseka njira imodzi kuti igwirizane ndi njira ziwiri zina.Vavu yamtunduwu nthawi zambiri iyenera kuyikidwa mopingasa papayipi.Malinga ndi njira yopatsira, valavu ya mpira imagawidwa kukhala: valavu ya mpira wa pneumatic, valve yamagetsi yamagetsi ndi valavu ya mpira.Ndipo za valavu ya mpira wamkuwa, mankhwalawa amatha kudula madzi mu payipi.Chifukwa chake, chida ichi chakhaladi chisankho chabwino pakafunika kusinthidwa.Ndipo anthu amathanso kumvetsetsa kuti pakugwiritsa ntchito, gawo lazogulitsa pagawo logawa limakhalanso lodziwika.Mukamagwiritsa ntchito mankhwalawa, chonde tcherani khutu kwa anzanu, ngati mukufuna kusintha njira ya sing'anga, mankhwalawa akhalanso chinthu chofunikira pakalipano.Ndipo anthu akuyeneranso kuzindikira kuti yakhalanso gawo lofunikira pakuwongolera magalimoto kuti athe kusanthula bwino.