HTF series of high-temperature exhaust fan fire Overview: HTF series fire temperature exhaust fan with excellent performance, high temperature performance, high efficiency, covering less than the centrifugal fan, easy installation. HTF series fire temperature exhaust fan of "national fixed fire extinguishing systems and fire-resistant component quality inspection center" test qualified, the performance of the leading domestic level. High temperature performance: Fan Test conform GBJ45-82 Fire Code standards, established above the standards of corporate internal control assurance system to run more than 60 minutes of continuous quotations exhaust fan at high temperature 300 ℃ conditions, at a temperature of 100 ℃ for 20 h / time is not damaged exhaust fan wucheng, widely used in senior civil oven, underground garage, tunnels and other occasions. About two-speed motor; two-speed motor is an asynchronous motor pole-changing speed is reached to change the number of pole pairs of the stator rotating magnetic field of the stator winding is connected by changing the method, thus changing the motor speed. According to the formula; n1 = 60f / p known asynchronous motor synchronous speed and inversely proportional to the number of pole pairs, doubling the number of pole pairs exhaust fan buy, synchronous speed down to half speed n1, the motor rated speed will drop approximately n half, so changing the number of pole pairs can achieve the purpose of changing the motor speed. This level of speed control method is not smooth speed control, and only applies to squirrel cage motors. 1.HTF-Ⅰ, HTF-Ⅱ represents pressure type fire temperature exhaust fan exhaust fan, leaf type axial flow type: HTF-Ⅰ (single speed) and HTF-Ⅱ (double speed) of two; HTF- Ⅲ, HTF-Ⅳ representation pressure fire temperature exhaust professionals; 2, HTF-X as a silencer fire temperature exhaust fan, the user can choose according to the actual needs of different kinds; 3, HTF-W series fire temperature rooftop row Smoke dedicated fans, users can choose according to actual needs retardant fiberglass hood or steel hood; 4, HTF-D low pressure type fire temperature exhaust fan; 5. Special note: GYF and HTF series fan is a similar product. Applications _ Chenyu exhaust fan and air conditioning (Online) _ 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.