Vertical arrangement Dg450 gravity blast doors / 00 * 600 with movable short tube blast doors / Ruihai pipeline supply, Contact: Lee, Telephone: 0317-6395321,13393375568, QQ: 1335947599, URL: www.czrhgd.com Company Name: Hebei Ruihai Pipe Manufacturing Co., Ltd. Address: Hebei Yanshan south zone (with the discharge of sewage water well / tank sewage hole manufacturer) 1. Gravity blast doors should be installed on the oil, gas boiler backpass safe location no injury to personnel and equipment, the blast doors and consider action. 2. The blast doors opening pressure 3kPa, also can produce the products according to the specified burst pressure requirements.