Fire and smoke dampers regulating valve factory sales, normally open, 70 degrees closed damper manufacturer, with 1, but more than a telecommunications signal input newest damper manufacturers, by eliminating the control room remote control to close the damper, generally used for peacetime air fire up a common air duct system can be controlled fire off unneeded air make room; construction and installation editing 1. dampers with fan, exhaust fan interlock. 2. The operation of the valve mechanism side should be not less than 200mm of clear space to facilitate maintenance. 3. The valve must be checked before installing the valve operating mechanism is intact, the action is flexible and effective. Low damper manufacturers, Yanda air conditioning (certified), Turpan damper by Wu County Yanda air-conditioning plant. Wu County Yanda air-conditioning plant (www.wcydkt.com) (www.wcydkt.com) Shandong Dezhou, heat, refrigeration and air conditioning equipment leader, over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. In Yanda air conditioning leadership with the staff warmly welcome all inquiries negotiations to create Yanda air conditioning better future.