Star Industrial Co., Ltd. [Jie Weinuo recommend spiral duct] spiral duct, galvanized spiral duct, large diameter spiral duct dust spiral duct, spiral duct on the market are generally divided into three categories according to the material: galvanized spiral wind pipe, stainless steel spiral duct and complex spiral duct. Where the spiral duct strip, stainless steel duct best quality, applicability, but the price is high. Currently on the market, the most widely circulating spiral duct is galvanized sheet. [Jie Weinuo Industrial Star recommendation - spiral duct] Jie Weinuo Industrial spiral duct installed horizontally mounted spiral duct diameter equal to or smaller than the size of the long side of 400mm, spacing should not exceed 4m; greater than 400mm, should not exceed 3m. Support and hanger spacing spiral galvanized spiral duct can be extended respectively to 5m and 3.75m; flange galvanized sheet steel for spiral duct, its support and hanger spacing should not exceed 3m. Spiral duct factory, Zaozhuang spiral duct, Jie Weinuo Industrial ventilation installation provided by 捷维诺 (Tianjin) Co., Ltd. Jie Weinuo (Tianjin) Co., Ltd. (www.jieweinuo.com) strong, credible, in Tianjin fans, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jie Weinuo Industrial and you hand into the brilliant, for a better future!