YGD type centrifugal pipeline fan is a direct flow type fan. The device has the advantages of compact structure, large capacity and easy installation. YGD fan not only can withstand high pressure, but also can adapt to the long run. Fan speed can be controlled by voltage or frequency conversion regulator. The number of fans can also be connected to the same controller, as long as the sum of the wind turbine rated current does not exceed the rated value of the controller. The series air exhaust of the medium is air and non corrosive, non spontaneous combustion, does not contain viscous substances. Wet or wet, allow to be installed in a wet or humid environment.