Ma valve a butterfly amagwiritsidwa ntchito pazinthu zosiyanasiyana monga malo opangira madzi, kukonza chakudya, zomera za mankhwala, ndi zina zotero. Ma valve awa amakhudza ntchito m'mafakitalewa pamene akudikirira kutumizidwa.Mwachitsanzo, m'malo opangira madzi, kumene ntchito yaikulu ya ma valve ndi kuyendetsa madzi oyenda, nthawi yopuma chifukwa cha ma valve omwe sapezeka angayambitse madzi osakwanira, omwe angakhale ovulaza thanzi laumunthu.

Nortech ndi m'modzi mwa otsogola opanga ma valve ku China omwe ali ndi chiphaso cha ISO9001.