Duct Fan Manufacturer Specifications much? Price quality okay? Is Weathervane brand?

Edit: Standard Electrical Co., Ltd. Shenzhen wind turbine experts more price and specifications, please visit our Ali official website: http: //fbemf2014.1688.com/ duct fan Manufacturer Specifications much? Price quality okay? Is Weathervane brand? China began to spin metal mine ventilation, mine fields and then into coal. Domestic initial rotating, is in the hands of the workshop by the craftsmen who beat came out. They were about 8% [1] impact on rotating initial understanding that rotating efficiency by 5% compared with the same post-secondary vane fan efficiency, higher than the fan with guide vanes [1 ] ([2] have the same discussion). In this guide the theoretical point of view, high-efficiency rotary application become a booster, so the industry began to expand the level of efficiency of rotating debate and questioned together, the basic situation is as follows: 1) [3] already He pointed out that the spin and 2K (+ secondary impeller vanes of the non-rotating) compared to the low efficiency of 1% to 2%. 2) In 2002, [4] From the theoretical analysis, design practice and performance tests compare discussed other aspects of the spin-efficient than 2K, even lower than 1K (+ rear vane impeller single-stage non-rotating). 3) From 2004 to 2008, the literature [5-15] from a different point of view of ordinary axial, tangential acceleration and spin of the technical characteristics of the three local fan of its use, and a more comprehensive exposition of the rotating Local ventilation low machine efficiency issues, and non-rotating Local Fan application full of expectations. 4) In 2005, [16] discusses the common axial (1K and 2K), acceleration of rotation and meridional pressure characteristics, introduced in 1991, 15 domestic companies of 17 different types of partial performance axial fan unity comprehensive assessment test results: Normal axial with muffler best, no muffler meridian acceleration, followed by rotating it again with a muffler. 5) In 2007, [17] pointed out the reasons for the spin efficiency is lower than 2K, amended [18] to spin different opinions and 2K efficiency point of view. 6) In 2008, [19] describes №16 spin prototype test results: with a diffuser means for rotating the highest static efficiency of 0.823 (motor efficiency is taken to be 0.9); [20] introduced №14 spin prototype test results: with a diffuser means for rotating the highest static efficiency of 0.816 (motor efficiency curve of motor efficiency values). 7) In 2008, some authors propose a first perspective in the description of the spin characteristics: the absence of guide vanes, alone, the efficiency is higher than normal axial fans around 5%. The author of the second view: Motor external efficiency of the two-stage axial fan with the same design methods and Tornado aircraft fairly. Or when the author describes the development of the 2BKj-11 Type Axial Fan pointed out: with rotating, the new fan (2BKj common axial) maximum total pressure efficiency than rotating high. 8) In 2010, the author analyzes five domestic companies to spin performance is not a real problem at the same time, proposed to promote the application of the spin pressure characteristic value is the best, not the most efficient new perspectives [24].