O le tusi lesona mama e faʻafefeteina le valve butterfly, fausaga faigofie, laʻititi laʻititi, mamafa mamafa, laʻititi laʻititi faʻapipiʻi, laʻititi laʻititi avetaʻavale, faigofie ma vave le faʻaogaina, ma e lelei le faʻatonutonuina o galuega ma faʻamaufaʻailoga.
Vaaiga Aoaoga O le valve polo tu'ufa'atasia e mafai ona vaevaeina i ni ituaiga se lua o tu'ufa'atasia ma vaeluaina, ona o le nofoa valve e fa'aaoga ai le mama fa'amaufa'ailoga a le PTFE fa'apitoa, o lea e sili atu le maualuga o le vevela, fa'aofuofu tete'e, fa'asuau'u, fa'afefete. Fauga o Oloa Vaega Autu ma Meafaitino Igoa Q41F-(16-64)C Q41F-(16-64)P Q41F-(16-64)R Tino WCB ZG1Cr18Ni9Ti CF8 ZG1Cr18Ni12Mo2Ti CF8M Po'o WCB ZG1TiCr18Ni9Ti CF8M Po'o WCB ZG1TiCr18Ni9Ti CF8 ZG1Cr18Ni12Mo2Ti CF8M Po'o WCB ZG1TiCr18Ni9Ti18Ni2 CF8M Bal...