Wannan jerin makafin farantin makami mai fasali ne kuma ana kiranta Goge bawul, bawul na bawul, kuma na'ura ce da za ta iya yanke matsakaici da ake buƙata ta hanyar Gas622-86 "Dokokin Tsaro na Masana'antu". Ana amfani dashi a cikin tsarin bututun mai matsakaici na masana'antu da ma'adinai, kariya ta muhalli da sauran masana'antu, mai cutarwa da harshen wuta. Hakanan ya dace da za a yi amfani da shi azaman farantin makafi a ƙarshen bututun don rage lokacin tabbatarwa ko don haɗa sabon tsarin bututun mai. Compared with other valve devices that make absolute cut-off in the pipeline, this series of fan-shaped blind plate valve has the characteristics of novel structure, light weight, small size, convenient operation, speed of action, and absolutely reliable cut-off gas performance.