Valve yachitsulo chosapanga dzimbiri ndi mtundu watsopano wa valve womwe umagwiritsidwa ntchito kwambiri. Mfundo yogwirira ntchito ya valavu ya mpira wosapanga dzimbiri ndi kusinthasintha pakati pa valve kuti valavu ikhale yosatsekedwa kapena yotsekedwa. Ma valve a mpira wosapanga dzimbiri ndi osavuta kusintha, ang'onoang'ono kukula kwake, amatha kupangidwa kukhala mainchesi akulu, amakhala ndi kusindikiza kodalirika, kapangidwe kosavuta, komanso kukonza kosavuta. Malo osindikizira ndi ozungulira amakhala otsekedwa nthawi zonse ndipo sawonongeka mosavuta ndi sing'anga. Amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana.