(Kufotokozera mwachidule)Fluoroelastomer ndi copolymer ya vinyl fluoride ndi hexafluoropropylene. Kutengera kapangidwe kake ka maselo ndi zinthu za fluorine, ma fluoroelastomers ali ndi kukana kwamankhwala osiyanasiyana komanso kukana kutentha kochepa.
Ma valve a butterfly amapezeka paliponse m'mafakitale ambiri chifukwa chowongolera bwino komanso kuphweka. Chinthu chofunika kwambiri chomwe chimatsimikizira mphamvu ya ma valve awa ndi mpando wa valve. M'nkhaniyi, tiwona mpando wa butterfly valve