Francis HTF temperature exhaust fan fire performance: Fan tested to meet fire code standards, established above the standards of corporate internal control assurance system can run continuously under high temperature 300 ℃ for 60 minutes or more, at a temperature of 100 ℃ continuous 20 hours / time is not damaged, widely used in high buildings, oven, underground garage, tunnels and other occasions. Properties and Applications 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 motor direct-drive, 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 Fire fan high temperature test methods, 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 approved for use by fire departments in major cities nationwide. HTF (B) type fan (PYHL-14A) Compact I single-speed structure, saving installation space. Type II two-speed air inlet is provided in the muffler collector, the fan quieter operation at low speed ventilation.