Calculate the required fan static pressure pipeline under the circumstances: 1, according to the amount of wind and wind speed (wind speed 10-15 m / s or so) to determine the cross-sectional area of ??the duct. Duct aspect ratio should not exceed 2: 1 (in order to save material and reduce the drag). 2, according to the wind speed, the wind pipe cross-sectional area, elbows, reducers, etc. to calculate the drag (ie, the required fan static pressure). The installation process a comprehensive sample of the familiar two-speed fan exhaust fan, fans are familiar with the specifications, in the form of impeller rotation direction and the direction of the air flow in and out, etc., you should check whether the collision phenomenon impeller fan before installation, and the components were fully inspection, the attachment is complete, whether the strong coupling of the components before installation carefully check whether the blades due to shipping damage or deformation, otherwise it should be repaired. 2, import and export of the fan duct connection should separate kitchen exhaust fan support, plus the weight of the pipe is not allowed on the blower parts, turbine installation should pay attention to the horizontal position of the fan, the fan and the foundation of the joint surface and the wind pipe connection should be adjusted so that the natural fit, can not be forcibly join. Exhaust fan works belong to the anti-fire system, exhaust system, it is generally linked with the fire alarm host. Smoke damper settings offer in the exhaust fan exhaust fan and exhaust pipe connections, set in the exhaust pipe is not the end exhaust valves, exhaust valves and the exhaust note damper is completely different device functions. Exhaust valve usually normally closed, opened fire, and alarm host linkage, automatic alarm system is turned on condition that a fire broke out (detector alarm), fire alarm host into automatic mode, exhaust valves open automatically, linkage exhaust fan starts. Smoke damper is usually always open, but also turned a fire, but when the flue gas temperature reaches 280 ℃, the smoke damper automatically close linkage has been opened fan stops running. Fire temperature exhaust fan | exhaust fan | Rui Xincheng Rui Xincheng air conditioning provided by the Texas Air Conditioning Equipment Co., Ltd .. Texas Rui Xincheng Air Conditioning Equipment Co., Ltd. (www.dzrxckt.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Rui Xincheng air conditioning and you hand into the brilliant, for a better future!