Double Inlet Forward Curved Impeller

Forward-curved centrifugal fans have a lot of shallow blades facing the same direction as the rotation. A forward-curved centrifugal fan is best for situations that require a large volume of air at low speeds. Conversely, backward-curved centrifugal fans have fewer blades.The difference in flow direction between a forward and backward curved centrifugal fan is the direction that the air exits the impeller circumference. With a backward curved impeller, the air exits in a radial direction whereas with a forward curved the air exits tangentially from the circumference of the fan.A forward curved impeller is characterised by a relatively large number of shallow blades facing the direction of rotation. For this type of impeller, flow from the impeller is produced in a tangential direction.