HTF series fire temperature exhaust fan for high-rise buildings, underground buildings and tunnels, drying room and other high-temperature exhaust or ventilation. More than 30 minutes of continuous operation at 280 ℃ under the high temperature conditions, medium temperature at 100 ℃ continuous operation 20 hours / time is not damaged, is the ideal fire performance necessary facilities 1, [1] the fan performance listed in the table maximum efficiency within the range of performance, 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, air volume, total pressure, dimensions and other properties have special requirements; 3, HTF-Ⅰ, HTF-Ⅱ represents pressure type fire temperature exhaust fan, leaf type with shaft Streaming: HTF-Ⅰ (single speed) and HTF-Ⅱ (double speed) of two; HTF-Ⅲ, HTF-Ⅳ representation pressure fire temperature exhaust professionals; 4, HTF-X is dedicated fire temperature exhaust silencer fan, users can choose according to the actual needs of different types; 5, HTF-W series rooftop fire temperature exhaust fan, the user can choose according to actual needs retardant fiberglass hood or steel hood; 6, HTF-D low pressure type fire temperature exhaust fan; 7. Special Note: GYF and HTF series fan is a similar product. Wind chassis choice points 1. wind chassis air flow control parameter selection, total pressure, efficiency, noise, and electrical power. Centrifugal and axial flow. 2. Fan the provision of the wind chassis, muffler favor. 3. When the fan selection, should take into account the loss of the piping system leakage, calculation errors, and negative deviations fan actual wind, air pressure, the general air volume of 1.05 to 1.1, pressure safety factor of 1.10 to 1.15. But do not use too much, in order to prevent long-term fans run at low efficiency area. 4. Note the pipe resistance characteristics matching networks and fan characteristics. For the stable operation of the fan, the fan should be made to work near its maximum efficiency point, the operating point of the fan performance curve to the right of the peak point of the total pressure (ie, the amount of wind side, and general all-pressure peak of 80% ). 2 points 1. Installation of the fan should be possible to aerodromes or arranged on the platform, in order to maintain and repair; centrifugal fan when equipped with motor power less than or equal to 75kW, the time to start with the valve installation only. When the result of the carriage of high temperature flue gas or air centrifugal blower of choice should be set up to start with the valve, causing the motor to prevent overload cold running. 2. Fan mounting pedestal (base) should have sufficient strength, stability and durability, vibration pedestal shall meet the following requirements: vibration frequency 1) Basic device should not exceed 1/3 of the motor and fan speed. 2) the difference between vibration velocity vibration velocity fan and fan operation is still required when more than more than 3 times. The connection between the import and export with duct 3. fan, flexible joints should be located. Inlet pipe, outlet pipe and other equipment should be independently supported by the foundation or the building other member firm support, housing should not bear the weight of other parts. 

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