蝶閥適用於自來水系統、城市管道工程、電子和工業管道作為雙向啟閉和調節設備，其調節範圍在0-90°之間。

Butterfly valve is applicable to tap water system, urban pipe gallery engineering, electronic and industrial pipelines

as two-way open­ing, closing and regulating equipment, and its regulating range is between O and 90.