<prompt> Amagiya e-valve akhona? Njengoba kunikezwe umbuzo odlule, bhala umongo onempendulo yawo. Kungaba imisho engu-1 kuya kwengu-20. Umongo:  <response>: Amagiya ama-valve alula kakhulu anikeza izenzakalo zobude obuhleliwe phakathi nomjikelezo wenjini futhi ngokuvamile enza injini ijikeleze ohlangothini olulodwa kuphela. Kodwa-ke iningi linomshini wokubuyisela emuva onganikeza izindlela zokonga umusi njengoba isivinini nomfutho kutholakala ngoku finyeza kancane kancane noma kunalokho, ukunciphisa umcimbi wokungeniswa; lokhu ngokulandelana kukhulisa isikhathi sokunwetshwa. Kodwa-ke, njengoba i-valve eyodwa efanayo ivame ukulawula kokubili ukugeleza kwe-steam, ukusika okufushane ekungenisweni kuthinta kabi isikhathi sokukhipha nokucindezelwa okufanele ngaso sonke isikhathi kugcinwe kungaguquguquki; uma umcimbi wokukhipha umfushane kakhulu, lonke umusi wokukhipha awukwazi ukukhipha isilinda, ukuwugwinya futhi unikeze ukucindezelwa ngokweqile ukhahlela emuva. 