3HP Ring Blower 930 KW is a type of industrial blower or fan that is commonly used for applications that require low-pressure, high-flow-rate air movement. It is also known as a side-channel blower or regenerative blower. The design of a ring blower involves a rotating impeller with blades that spin inside a housing or ring. As the impeller rotates, it creates a series of air pockets or channels that draw in air from the outside and then compress and discharge it out the other side of the ring.