Sau uku biya diyya butterfly bawul BW, kuma aka sani daSau uku biya diyya malam buɗe ido, ne daya irin high yi malam buɗe ido bawuloli, tsara don aiki yanayi na high matsa lamba, high zafin jiki, da kuma high mitoci na bude da kuma kusa.

Concentric roba lined malam buɗe ido bawul, tare da balagagge zane da masana'antu fasahar, ne abin dogara a cikin inganci da sada zumunci a cost.Amma ga mai tsanani aikace-aikace kamar high yanayin zafi ko a high budewa da kuma rufe mitoci, shi ba a yarda a yi amfani da taushi seatfly bawuloli.So. da wuya hatimi malam buɗe ido bawuloli, karfe wurin zama ko yumbu wurin zama, tsara don high zafin jiki, high matsa lamba ko high mita na bude-rufe, ya zo a cikin amfani, amma sealing yi na gargajiya wuya hatimin malam buɗe ido bawul ya kasance ko da yaushe wani babban damuwa.

Bawul ɗin eccentric malam buɗe ido uku(wanda kuma aka sani da bawul ɗin bawul ɗin butterfly valve) an ƙirƙira shi a cikin wannan yanayin.

zubewar sifili na musau uku eccentric malam buɗe ido bawulana aiwatar da zoben rufe bakin karfe da aka ɗora akan diski.Ana aiwatar da ƙirar jujjuyawar kusurwa-dama tare da juzu'i na sifili ta hanyar ƙa'idar eccentric mai ban mamaki sau uku.Yana kawar da gogayya tsakanin wurin zama da zoben rufewa a cikin jujjuyawar 90º, ƙaramin juyi yana nufin za mu iya fara bawul ɗin tare da ƙaramin mai kunnawa, don adana farashi da sarari mai yawa.