Ngesikhathi sokuvula nokuvala i-valve yeglobu yensimbi eyenziwe ngomgunyathi, ngenxa yokuthi ukungqubuzana phakathi kwe-disc kanye nendawo yokuvala yomzimba we-valve kuncane kunaleyo ye-valve yesango, ayigugi.
I-stroke yokuvula noma yokuvala ye-valve stem imfushane kakhulu, futhi inomsebenzi wokunqamula othembeke kakhulu, futhi ngenxa yokuthi ukuguqulwa kwembobo yesihlalo se-valve kuhambisana nokushaywa kwediski ye-valve, kulungele kakhulu ukulungiswa kwesilinganiso sokugeleza. Ngakho-ke, lolu hlobo lwe-valve lufaneleka kakhulu ukunqunywa noma ukulawulwa nokudonsa.
Njengomkhiqizi ochwepheshile wamavalvu ensimbi enziwe ngomgunyathi futhi othumela ngaphandle, sithembisa ukuhlinzeka amakhasimende ngesevisi yekhwalithi ephezulu yangemuva kokuthengisa, okuhlanganisa nalokhu okulandelayo:
1.Nikeza isiqondiso sokusetshenziswa komkhiqizo neziphakamiso zokuwulungisa.
2.Ngokwehluleka okubangelwa izinkinga zekhwalithi yomkhiqizo, sithembisa ukuhlinzeka ngosekelo lobuchwepheshe kanye nokuxazulula izinkinga ngesikhathi esifushane kakhulu.
3.Ngaphandle komonakalo odalwe ukusetshenziswa okuvamile, sinikeza ukukhanda kwamahhala kanye nezinsizakalo zokushintshwa.
4.Sithembisa ukuphendula ngokushesha ezidingweni zesevisi yamakhasimende ngesikhathi sewaranti yomkhiqizo.
5. Sihlinzeka ngosekelo lwesikhathi eside lobuchwepheshe, ukubonisana nge-inthanethi kanye nezinsizakalo zokuqeqesha. Umgomo wethu uwukunikeza amakhasimende umuzwa wesevisi ongcono kakhulu nokwenza ulwazi lwamakhasimende lube mnandi futhi lube lula.