Butterfly Valve, kuma ana kiranta da "concentric", "roba layi" da "roba zaune" malam buɗe ido bawul, yana da wurin zama roba (ko resilient) tsakanin diamita na waje na diski da bangon ciki na bawul.

Bawul ɗin Butterfly bawul ɗin juyi kwata ne wanda ke juyawa digiri 90 don buɗewa ko rufe kwararar kafofin watsa labarai.Yana da diski madauwari, wanda kuma aka sani da malam buɗe ido, wanda aka samo a tsakiyar jiki wanda ke aiki azaman tsarin rufewa na bawul.Ana haɗa diski zuwa mai kunnawa ko rikewa ta hanyar shaft, wanda ke wucewa daga diski zuwa saman jikin bawul.

Hakanan ana amfani da bawul ɗin malam buɗe ido azaman bawul ɗin daidaita kwararar ruwa, idan diski bai juya zuwa cikakken juyi kwata ba, yana nufin bawul ɗin yana buɗe wani bangare, zamu iya daidaita kwararar ruwa ta kusurwar buɗewa daban-daban.

Butterfly Valve,mafi m zane tare da gajeren fuska da fuska.it's fit tsakanin biyu flanges, tare da studs wucewa daga daya flange ta cikin sauran.A bawul aka gudanar a wurin da shãfe haske da gasket da tashin hankali na studs.A resilient zaunar da malam buɗe ido bawul lug irin ne mai nauyi, goyon baya-free, kudin-tasiri, kuma abin dogara bayani ga daban-daban aikace-aikace.

Butterfly Valve,yawanci ana amfani da shi a inda bawul ɗin yake a ƙarshen bututu tunda babu 2nd flange don amintaccen studs.Madadin haka, ana jefa lugga a kan bawul ɗin tare da ramukan da aka buga waɗanda suka dace da ƙirar ƙulla don girman da matsi na flange.Ana ratsa bolts ta cikin ramukan flange kuma ana zare su cikin ramukan da aka buga.