Francis fan air-conditioning fan manufacturers preferred Rood main impeller, housing, import collector, deflector, electric motors and other components in the unit amount of wind, air pressure unit operating conditions, while in the case of low speed obtain higher fan pressure. In the industrial and mining enterprises and senior civil ventilation system can replace the low-pressure centrifugal fan or replaced without the need for a large number of high-pressure axial fan silencer measures. Fan performance is within the performance range of the most efficient, according to traffic divided into five characteristics, according to the performance table, whichever the selection, performance selection table is performance under standard conditions, wind turbine installation can be divided into vertical or horizontal. After balancing check, speed test, a good aerodynamic performance. Francis fan manufacturers preferred Rood conditioning fan mechanism compact, easy installation, reliable operation of the axial-flow fan than in the case of the same small amount of wind, air pressure can be directly connected to the duct, horizontal or vertical installation, operation easy to use features. Meridian impeller has accelerated features twisted flat welded on wheels. Outlet is equipped with deflector, has a good flow distribution, pressure is stable. Low noise: The fan casing is specially designed to greatly reduce the outflow of noise. Circular enclosure, and mute function of the concentrator is coupled into a whole. Lianyungang Rood air-conditioning equipment installation Co., Ltd. Contact: road manager Francis fan