Francis fan use, maintenance, maintenance operation at room temperature, find the motor temperature is too high, Francis fan model, it may be caused by the following reasons: A motor bearing damage, Shijiazhuang Francis fan, with a small gap, does not meet the requirements; B axis and bearing installation skew, two bearing misalignment; C power supply voltage is too low or the three-phase motor-off phase operation. HTF (B) fire temperature exhaust fan Francis multi-objective optimization using CAD software design, matching molded cone twisted wing impeller, high temperature fully enclosed motor built, arranged a special motor cooling system. Use two-speed direct-drive motor, metallurgy Francis fan, to one machine (that usually send row when high-temperature exhaust ventilation and firefighting), arranged after the electrical control box can be remotely controlled automatically. High temperature performance, air volume, high pressure, easy installation, etc., are widely used in high-rise buildings, drying room, underground garage, subway tunnels and other occasions to send fire smoke and exhaust ventilation. Press GA211-1999 fan high temperature test methods for fire, explosion Francis fan, can run at 400 ℃ more than 100 minutes of continuous high temperature, medium temperature at 100 ℃ continuous operation 20 hours / time is not damaged, it has been the major cities nationwide fire departments authorized use. Francis fan tunnel | l Rui Electric (certified) | Shijiazhuang Francis fan ventilation and air conditioning provided by the Swiss liter Electrical Equipment Factory. L Rui HVAC Electrical Equipment Factory (www.dzsrxfkt.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. In liters Swiss electromechanical leadership with the staff warmly welcome all inquiries negotiations to create liter Swiss electromechanical better future.