Qhov kev tsis ua tiav ntawm valve springs feem ntau yog manifested nyob rau hauv qhov tsis ua hauj lwm ntawm lub valve kom kaw lossis qhib lub cav tsis ua haujlwm zoo. Valve Springs muaj ob qho tib si hauv ntej thiab nraub qaum kev cuam tshuam, uas yuav tsum tau txiav txim siab raws li tus qauv. Most models use flat-top valves because of their simple structure, easy manufacturing, small mass and small heat-absorbing area. Lub taub hau concave, tseem hu ua flared valve, muaj ib qho me me hauv inertia, tab sis muaj ib feem me me hloov nrog lub pas ntsuas hluav taws xob, tsis yog rau kev tso pa tawm, tsis yog rau kev tso sab nrauv. Lub convex sab saum toj valve, uas yog, lub voos kheej loj, muaj cov cua sov loj, thiab tso tawm kom zoo rau cov nyhuv hluav taws xob, feem ntau yog siv rau qee qhov kev tso pa. Cov tsos mob ntawm valve lub caij nplooj ntoo tsis ua haujlwm suav nrog kev teeb meem hauv lub cav pib, thiab lwm yam yog tias tsis cuam tshuam rau lub sijhawm ua haujlwm ib txwm muaj ntawm lub cav.
