Choice points: The main exhaust fan selection control parameters temperature, air flow, total pressure, efficiency, noise, electrical power, speed and shaft power. Exhaust fan at a temperature not higher than 85 ℃ conditions should be long-term normal operation. Exhaust fan shall ensure that: When the transmission medium temperature at 280 ℃ when continuous work 30min, and still continuously at medium temperature cooling to ambient temperature during normal operation. At rated speed exhaust fan manufacturers in the work area, the measured pressure curve with the description given in the fan curve should meet the following requirements: axial-flow exhaust fan exhaust fan purchase at a predetermined flow rate, the corresponding to the pressure deviation of ± 5%. Centrifugal exhaust fan at a predetermined flow rate, corresponding to the pressure deviation of ± 5%. A sound level than the exhaust fan noise limits in the specification given operating point should meet the requirements under the JB / T8690-1998 of. Exhaust fan can be an ordinary or special steel centrifugal fan axial exhaust fan. Exhaust fan specifications according to "fire protection design of tall buildings" in the regulations. The minimum air volume exhaust fan 7200m / h exhaust fan manufacturer, the maximum air flow should not exceed 60000m / h (refers to a partition of the maximum exhaust air volume). Exhaust fan flow should be required to increase airflow value of not less than 10% to 20% of the surplus amount. Pressurized smoke exhaust fan pressure value shall be the most unfavorable loop system to calculate and ensure the value of residual pressure in the stairwell 40 ~ 50Pa. The residual pressure value inside the front room, shared room, fire elevator room, refuge floors, etc. 25 ~ 30Pa. Fire exhaust fan should be consistent with the current standard JB / T10281-2001 "fire exhaust fan technical conditions." Fan exhaust system should be set separately. Exhaust fan should be in the same position or an upper layer of smoke region. Installation and maintenance: the kitchen fan is indispensable key kitchen equipment, recommended not installed in the ceiling, to be installed in the engine room and so on, roofing or exterior wall for easy maintenance of the place. Working kitchen fan due to prolonged high temperatures, humidity, smoke gases. Regular maintenance is indispensable to work into the high-temperature test specified by GA211 bar. High performance crystal playing field required to achieve the specified 4.42. . Exhaust fan manufacturers | Suntown clean air conditioning (certified) | Bayannaoer exhaust fan is provided by the Texas Air Conditioning Equipment Co., Ltd. Sheng-purification. Texas Air Conditioning Equipment Co., Ltd. Sheng-purification (www.dzhffj.com) is an industry leader in Shandong 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 . Sheng leader in clean air conditioning with the staff warmly welcome all inquiries negotiations to create clean air conditioning Sheng better future.