Several impeller blades welded to the arc cone and plate type roulette wheel cover middle fan selection, impellers through static and dynamic balance efficacy fan manufacturers, smooth operation. Maintenance of impeller and shaft: impeller and shaft at the factory to do the balancing fan maintenance, if the impeller removed from the shaft, the relative position between all the components to do the mark after re-assembly, to restore the original Location. Fan performance parameters, Dongying fan, Zibo Blower by Zibo Blower Factory Co., Ltd. Zibo Blower Factory Co., Ltd. (www.zibo-fengji.com) to provide "fan, mine fan, mine fan, explosion-proof fan, heat fan, Boiler Fan" and other business, the company has "cloud laugh" and other brands. Focus on the fans, ventilation equipment, etc., in Shandong Zibo have higher visibility. Welcomes inquiries, contact: An Jingli.