Ndi zachilendo kumva phokoso pamene mukutsegula silinda ya gasi.
Gasi, nthawi zambiri amakhala ndi mpweya, amapanikizidwa mu silinda kuti asungunuke. Kutsegula valavu ya silinda kumayambitsa kutembenuka kwa gasi wamadzimadziwa kubwerera ku mawonekedwe ake a mpweya kudzera pa valve yochepetsera kuthamanga., njira yomwe imapanga phokoso chifukwa cha kusintha kwamphamvu.
Kuphatikiza apo, pamene gasi akutuluka, zimapanga kukangana ndi mapaipi a gasi, kuchititsa mkokomo. Phokosoli limawonekera pakutsegula silinda yamafuta ndikutha pomwe silinda yatsekedwa..