Our range of High Pressure blowers are available in either mild steel or stainless steel. A centrifugal fan is really a mechanical device that's accustomed to move air or gas. Centrifugal ventilator has a number of blades mounted around the hub, which turns on a shaft that passes through the housing.A Centrifugal fan can come in three different types of fan blades. They can come with forward curved blades, backward curved blades and straight radial blades. The type you need will come down to what the conditions are within the area in which you intend to use the device.