Amalunga okunweba irobho ayizinto ezibalulekile ezinhlelweni ze-valve zezimboni, ukusebenzela umsebenzi obalulekile ekugcineni ubuqotho nokusebenza kahle kwamapayipi. Lezi zixhumi eziguquguqukayo zenzelwe ukumunca ukunyakaza, ukudlidliza, nokuhlukaniswa okungalungile ezinhlelweni zamapayipi, esiza ukuvimbela umonakalo nokuqinisekisa ukusebenza okubushelelezi. Enye yezinzuzo eziyinhloko zokukhuliswa kwenjoloba yikhono labo