Ukuze kuhlangatshezwane nezidingo ngokushesha lakhiwa ubunjiniyela zasolwandle kanye ukunikeza isixazululo kakhulu Izindleko-ephumelelayo, NSEN ukuklama amanzi asolwandle ukumelana butterfly valve ngoba zenuzi amanzi Ukupholisa futhi kungeyona njll Imbobo kanye disc we kulolu chungechunge kuthiwa ukuvikela nge enamathela ekhethekile ukuvimbela ukugqwala olwandle. Xhumana nathi ukuze ufunde kabanzi noma ukwenza ngendlela oyifisayo valve-phrojekthi yakho.