Vavu yoyang'ana pampando yokhazikikaimakhala ndi thupi la valve, boneti, ndi disc yomwe imalumikizidwa ndi hinge.Vavu ndi ya mtundu wa cheke chogwiritsira ntchito mpando wokhala ndi ngodya komanso wotsekedwa mokwanira, disc yokhazikika.Imatha kugwiritsira ntchito madzi ambiri kuphatikizapo madzi omwe ali ndi zolimba zoyimitsidwa.Disikiyi imasuntha kuchoka pampando wa valve kuti ilole kuyenda kutsogolo, ndikubwerera kumpando wa valve pamene kutuluka kwa mtsinje kumayimitsidwa, kuteteza kubwerera kumbuyo.amalola kutuluka kwathunthu, kosasunthika ndipo kumangotseka pokhapokha ngati kupanikizika kumachepa.Ma valvewa amatsekedwa mokwanira pamene kuthamanga kufika pa zero ndikulepheretsa kutuluka kwa mmbuyo.Kuthamanga ndi kuthamanga kwapakati mkati mwa valve kumakhala kotsika kwambiri.Valavu imatsegulidwa ndi kutuluka kwamadzi mu njira imodzi ndipo zimadzitsekera zokha kuti zisamayende mozungulira.

TheVavu yoyang'ana pampando yokhazikikaamagwiritsidwa ntchito makamaka popereka madzi ndi ngalande, ndi magawo ena a mafakitale a potulutsa mapaipi kuti apewe kusagwirizana.Chifukwa mphete yosindikizira ya mankhwalawa imapangidwa ndi mapangidwe okhazikika, nthawi yotseka ndi yochepa, ndipo kuthamanga kwa nyundo yamadzi kumatha kuchepetsedwa.