Lua siaki siaki valve e ta'ua fo'i fa'ama'i fa'ama'i ituaiga butterfly siaki valve swing siaki valve.To lona ituaiga siaki vavle lelei le toe faafoi faatinoga, saogalemu ma le faʻamaoni, faʻasolosolo faʻasaga teteʻe coefficient.Ie masani ona faʻaaogaina i le suauu, vailaʻau, meaʻai, vai ma alavai, ma le malosi.O loʻo maua le tele o mea faʻapipiʻi, e pei o le uʻamea lafo, uʻamea ductile, uʻamea uʻamea ma isi.