Damper excellent quality, standardization, interchangeability. Board quality thick. Fusing timely. Fire dampers, normally open, 70 degrees or 280 degrees closed, Xinzhou damper, generally installed in the duct through the firewall, fires off effect, you can set the output electrical signals, fire dampers installation, the temperature exceeds 70 degrees or 280 degrees the valve is closed, the linkage to send (s) off the fans. Damper installed in the ventilation, air conditioning system, the return air duct on the road, usually was turned on, when a fire in the pipeline when the gas temperature reaches 70 ℃, fusible film fuse, the valve automatically closes damper products in the torsion spring force Uses (1) in an open state, when the fire when the temperature reached 280 degrees inside the flue gas exhaust pipe is closed, and to meet leakage of smoke and fire integrity requirements within a certain period of time, from the smoke fire retardant (2) DC24V power by the valve closed; (electric type smoke damper) (3) or manual reset manually shut down; (4) closed DC24V electric reset; (automatic type smoke damper for local inconvenience hand operated) (4) Output valve closing signal interconnection with other fire-fighting equipment. First, the electric control valve product selection points 1. electric control valve selection of main control parameters are: nominal diameter, nominal pressure design, media allowable temperature range, the flow coefficient. 2. For the required flow and opening height is proportional strictly the case, you should use special valve. Precision adjustment process need to use electric V-type valve; diameter> 200 preferably electric control valve series. 3. The valve sealing performance is one of the main indicators for assessing the quality of the merits of the valve. Valve sealing performance includes two aspects, namely leakage and leakage. Seal leakage refers to the degree of media to reach between the seat and the closure member. Leakage refers to the parts of the stem packing leak leak, the stem portion of the gasket and valve leak caused due to casting defects. Leakage is allowed to happen. The valve has a quick opening flow characteristics desired, parabolic, linear, equal percentage of four, smoke damper, one has to have an appropriate control valve flow characteristics of the actual work flow characteristics. 5. Adjust selected valve nominal diameter of the valve should be determined according to the required flow capacity. Valve nominal diameter should not be too large or too small. Too large, fire dampers price, increase the project cost, and the valve is in the low percentage range, adjust lower precision, the control performance deteriorated. Is too small, increase system resistance, even when the valve is 100% open, the system still could not reach the capacity requirements. Smoke damper, Rui Xincheng air conditioning (certified), Xinzhou damper is provided by the Texas Air Conditioning Equipment Co., Ltd. Rui Xincheng. Rui Xincheng Texas Air Conditioning Equipment Co. (www.dzrxckt.com) is an industry leader in Shandong Dezhou, fans, ventilation equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Rui Xincheng air conditioning in leadership with the staff warmly welcome all inquiries negotiations to create a better future Rui Xincheng air conditioning.