Special Features: The device can transport dry fluidity powder material in any distance. The transport ability is 1500m3/h. It is widely used in building material, metallurgy, light chemical and feed industries etc. to feed or transport cement, powder coal and flour of milling and stove. But it is not suitable for the material of great granularity, big washiness and bad fluidity. The device is divided into three layers. Puff layer is below the device, transport material layer is above and ventilate layer is in the center of device. Low pressure and little volume air supplied by wind machine flow from puff layer to ventilate layer, making the material flowing and realize the moving of material. It has the features of little cost of energy, no noise, no pollution, no lubrication, low maintain ratio, high carrying ability, lightweight, saving effective place, agility to dispose wire and easy to change transport direction. It is only can transport in certain angles, not upwards. Otherwise please choose air-elevating system. Great obliquity is good for transporting if the technics disposal permits. Obliquity is always 4 ï½? 6%. Commendatory obliquity is more than 10% when transport coarse material.