Model: HIF-II (double speed) series fire exhaust fan, high temperature motor, exhaust fan specifications, totally enclosed motor built with high special motor cooling system efficiency, exhaust fan manufacturers, low noise, reasonable structure , small size, easy installation application: high-rise buildings, drying room, underground garage ventilation or high-temperature exhaust. Continuous operation at 300 degrees for 60 minutes or more high temperature, medium temperature conditions of continuous operation at 100 degrees 20 hours / time is not damaged, defender exhaust fan, fire is the ideal necessary equipment. HTF series exhaust fan fire for high-rise buildings, underground buildings and tunnels, drying room and other high-temperature exhaust or ventilation. Continuous operation at 280 ℃ under the high temperature for 30 minutes or more, the medium temperature at 100 ℃ continuous operation 20 hours / times without damage, fire is the ideal necessary facilities. 1, the performance of the fan performance table lists the properties in the most efficient range, according to the performance of the air volume is divided into five working points, according to prevail in the selection of the performance table. Qualified fan factory is rated flow, total pressure error does not exceed ± 5%, the performance of the selection list is performance under standard conditions, regardless of the technical documentation or performance are subject to the requirements of the standard state orders; 2, the fan installation can be divided into horizontal and roof type, exhaust fan buy air volume, total pressure, dimensions and other properties have special requirements; exhaust fan in the specification; A sound level noise limits should be consistent with JB / T8690- 1998 regulations. 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, 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. Exhaust fan model _ Chenyu air conditioning (certified) _ defender exhaust fan by Wu Cheng Chen-yu air-conditioning Limited. Wu Cheng Chen-yu air-conditioning Co. (www.wccykt.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 . Chen Yu-conditioned in leadership with the staff warmly welcome all inquiries negotiations to create Chenyu air conditioning better future.