Beijing high tech Development Co., Ltd.   

Beijing Gaofang Technology Development Co., Ltd. is committed to professional R & D and production - normally open type electromagnetic door stopper. Detection of qualified products by the Ministry of public security, quality and stability. Safety state, working voltage of DC24V, electromagnetic door stopper pull in, the door body kept open; in case of fire, door stopper off, releasing the closed door body, denial of smoke diffusion, the provisions of article.5.4.2 to "specification" fire protection design of tall buildings GB50045-95: for fire doors, the evacuation aisle stairs. And former should has its own shut down function. Door stopper bracket for the solid metal structure; the instantaneous power, eliminate remanence adhesive; walk the line with concealed type of protection...