Product is mainly used for smoke dampers on duct ventilation and air conditioning systems, usually in a "normally open" state smoke damper, when the air temperature reaches 70 ℃, by internal fuse action valve automatically closes. Exhaust port, exhaust valve is mainly set in the pipe exhaust system, or installed in the inlet of the exhaust fan fire, usually turned off, in case of fire, through interaction, automatically turn on the exhaust. Fire damper is installed in the exhaust fan at the entrance and ventilation and air conditioning systems use either system, usually in a "normally open" state, ventilation, air flow in the pipe when the temperature reaches 280 ℃, the valve by fusible metal temperature fuse action automatically closed, cutting off airflow to prevent the spread of fire. Air Conditioning Equipment Co., Texas Rui Xincheng smoke damper type: normally closed smoke damper, remote-controlled smoke damper (rope-controlled), normally open type smoke damper, automatic reset type smoke fire valve. Shandong smoke damper 280 degrees Uses: (1) allows the valve is closed by DC24V power; (electric type smoke damper) (2) Texas Echo smoke damper closed DC24V electric reset; (automatic type smoke damper for local inconvenience manually operated) (3) or manual reset manually shut down; (4) Shandong smoke damper usually 280 degrees in a normally closed position, either manually or automatically open when the fire damper is installed, when the air flow When the temperature reaches 280 ℃, the temperature sensor action, the valve is closed; (4) the output signal of Texas Echo smoke damper closed damper can interlock with other fire-fighting equipment. . First, the electric control valve product choice points 1. electric control valve to control the selection of the main parameters are: nominal diameter, nominal design, media allowable temperature range, flow coefficient. 2. For the required flow and opening height proportional to the price of strict occasions damper should use special valve. High-precision adjustment process need to use electric V-type valve; diameter> 200 is preferably electrically adjustable butterfly valve series. 3. The valve sealing performance is one of the main indicators of the quality of the assessment of the merits of the valve. Valve sealing performance includes two aspects, namely, leakage and leakage. Endoleak refers to the degree of media to reach the seal between the valve seat and the closure member. Leakage refers to the parts of the stem packing leak leak leak valve stem gasket and valve parts due to casting defects caused. Leakage is allowed to happen. 4. Adjust the valve flow characteristics are ideal for quick opening, parabolic, linear, equal percentage of four, need to choose the appropriate flow control valve has a characteristic based on the actual work flow characteristics. 5. Select the nominal diameter of the valve shall be determined according to the required flow capacity of the valve. Valve nominal diameter should not be too large or too small. Too large, increasing the project cost, and the valve is in the low percentage range, adjust the lower precision, the control performance deteriorated. Is too small, increase the system resistance, even when the valve is 100% open, the system still could not reach capacity requirements. Wholesale dampers, Rui Xincheng air conditioning (certified), Ili dampers provided by Rui Xincheng Air Conditioning Equipment Co., Texas. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Rui Xincheng conditioning in leadership with the staff warmly welcome all inquiries negotiations to create a better future Rui Xincheng air conditioning.