SWF (A) [FLF] series of low-noise fan Francis Overview: SWF (A) [FLF] series low noise Francis fan for ventilation and air conditioning systems at present, but the traffic is low or high pressure turbine flow often too large and Such a system is not enough pressure and the fan does not match the circumstances, we "accelerated Meridian" design approach based on "quasi-ternary" theory and the successful development between centrifugal and axial ratio between the number of revolutions, the pressure coefficient higher than the axial fans and centrifugal flow system is higher than a new fan. Therefore, selection of a wider range of users, the system matches the more reasonable, beneficial system energy. It is currently the most appropriate new product pipeline fan pressurization system. Uses: Widely used in industrial and civil construction of ventilation and air conditioning systems. Particularly suitable for pressurized air supply piping. SWF (A) [HLF] -Ⅰ type can replace the high-pressure axial fan SWF (A) [HLF] -Ⅱ double speed, a dual-purpose machine, SWF (A) [HLF] -Ⅲ type can replace the high pressure centrifugal fan . Structure and characteristics: The basic structure of the type of inlet and outlet on the same axis (ie axial structure), round shell as cones, leaf shape along the width of the flow was unequal. There are straight cylindrical type, drum-shaped and curved plus three types of mufflers and other imports. According to the meridional flow acceleration principle, the fan has dual characteristics of centrifugal and axial flow, that is both high pressure have a larger flow, and has a high efficiency, low noise, high efficiency and wide area and so on. Compact, light weight, easy installation, small footprint. Installation and Use: horizontal, vertical and ceiling can be installed. Ventilation, air and pipeline pressure can be used. Fan use, maintenance, maintenance 1, maintenance. A, should be carefully checked before installation whether the blades and chassis have due to shipping damage or deformation, otherwise should be repaired can be installed; whether B, there is reason to check the blade and duct connection screw loose touch shell, such as blade duct clearance uneven, you should first adjust before installation; C, before starting the fan, we should first check whether the prejudice within the rotating fan and piping items; D, check the motor insulation performance is good, after turning on the power to see whether the collision and friction abnormal vibration; E, in normal operation, such as the case of the following conditions should immediately stop inspection: 1, the motor temperature exceeds 70 degrees Celsius; 2, motor Chang white smoke; 3, where a strong vibration or magnetic blocks have a greater voice. 2, the common cause of the fan failure analysis generated a lot of fan vibration, can be checked from the following aspects: A, relative to the impeller and duct friction and abnormal sound and vibration; B, stand foot bolts not tightened, will large vibration occurs; C, impeller compressive deformation due to transportation or loose bolts and vibration; D, blade and shaft sleeve attachment screws loose or bending E, bracket and motor connection lead screw loose leaf imbalance bearing damage causing intense vibration. 3, fever. At room temperature operation for some time, found that the motor temperature is too high, you may have the following causes: A, motor bearing damage, with the gap is small, does not meet the requirements; B, shaft and bearing mounting skew, both bearing different axes degree; C, the resistance is too large, the motor overload operation; D, the power supply voltage is too low or the three-phase motor with run-off.