Exhaust fan choice points: one, the choice of the main exhaust fan control parameters for temperature, air flow, total pressure, efficiency, noise, electrical power, speed and shaft power. 2, the exhaust fan at medium temperature not higher than 85 ℃ conditions should be long-term normal operation. 3, exhaust fan shall ensure that: When the transmission medium temperature at 280 ℃ continuous working time 30min, and the temperature of the cooling medium is still continuous normal operation to ambient temperature. 4, at the rated speed in the work area fire temperature exhaust fan latest offer, fans of the measured pressure curve and the instructions given in the curve should satisfy the following requirements: 5, axial flow exhaust fan in the prescribed next, the corresponding pressure value deviation of ± 5%. 6, the centrifugal exhaust fan at a predetermined flow rate, the pressure corresponding to the deviation of ± 5%. 7. A sound level than the noise limits should be consistent with the provisions of JB / T8690-1998 the exhaust fan in the description given operating point under. 8, exhaust fan can be an ordinary or special steel centrifugal exhaust fan axial fan. Exhaust fan specifications according to "fire protection design of tall buildings" in the regulations. The minimum air volume exhaust fan 7200m / h, the maximum air flow should not exceed 60000m / h (refers to a smoke partition of maximum air volume). 9, exhaust fan flow should be required to increase airflow value of not less than 10% to 20% of the surplus amount. 10, pressurized smoke exhaust fan pressure value shall be calculated loop system is the most unfavorable, and to ensure that the value of the residual pressure in the stairwell 40 ~ 50Pa. The value of the residual pressure inside the front room, shared room, fire elevator room, refuge layer 25 ~ 30Pa. 11, fire exhaust fan should be consistent with the current standard JB / T10281-2001 "fire exhaust fan technical conditions." 12, the fan exhaust system should be set individually. Exhaust fan should be in the same position or upper layer of smoke zone. Fire temperature exhaust fan installation process: a comprehensive sample of fans familiar, familiar fan specifications, form of the impeller rotation direction and the direction of the air flow in and out, and so the full range of fire temperature exhaust fan, you should check before installing the fan impeller or without collision phenomenon, and conduct a comprehensive inspection of the components, the attachment is complete, whether the strong connection of the components, carefully check before installation if the blades due to shipping damage or deformation, otherwise it should be repaired. 2, there should be a separate duct connecting the fan support import and export, 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 ground connection to the combination of surface and out of the wind pipe should be adjusted to make it a natural fit, not be forced to join. 3. After installing the fan, hand or lever Stubbs impeller, check whether there is too tight or collision phenomena, whether or interfere with the rotation of articles fire temperature exhaust fan, no abnormal phenomenon, the only test run, the opportunity to drive the wind the exposed portion of the device should guard (user-supplied). Such as when the fan is not connected to the inlet pipe, also need to purchase protective nets or other safety devices (user-supplied). 4, the fan wiring must be accurate and reliable, the fan housing should be properly grounded, grounding must be reliable. Fan power supply must be complete and comply with the relevant requirements. Electrical wiring must have electrical wiring expertise. Fire brand of choice for high-temperature exhaust fan _ _ liters Swiss electromechanical Hunan fire temperature exhaust fan ventilation and air conditioning provided by the Swiss liter Electrical Equipment Factory. L Rui HVAC Electrical Equipment Factory (www.dzsrxfkt.com) is a leader in Dezhou, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. L Swiss leader in mechanical and electrical staff warmly welcome all inquiries negotiations to create liter Swiss electromechanical a better future.