How it works: glass bulb sprinklers glass sphere, filled with a thermal expansion coefficient of the organic solution, at room temperature closed Aoyama open nozzle, the sphere of housing can withstand a certain degree of support force open Qiaokou closed sprinklers, sprinklers guarantee sealing closed the open nozzle, when the fire broke out, and the organic solution temperature and expands until vitreous broken tee, seals lose support after the water washed off, thereby starting the sprinkler. Repeated opening and closing pre-action system can automatically close the valve after extinguishing the fire, open the valve and pre-action sprinkler system again resurgence. It applies after extinguishing water must be stopped in place. The system now has two forms: one is the opening and closing of the nozzle with automatic repeat function, the other is to achieve the system through a smoke detecting sensor temperature control valve control system repeated opening and closing function. East Lake closed open nozzle, a Anyuan electromechanical (certified), Hannan closed open sprinklers by the Hubei Chong Anyuan Electrical Equipment Co., Ltd. to provide. Hubei Chong Anyuan Electrical Equipment Co., Ltd. (www.hbcay119.com) (www.hbcay119.com) is a leader in Wuhan, fire protection equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. Anyuan electromechanical leadership in creating the staff warmly welcome all inquiries negotiations to create create a better future for electromechanical Anyuan.