... pump 3.energy conserving 4.long life Ring Blower,Air PumpFLS Blower Feature: Motor reached Urope EFF2 Class,Durable High ... It is often known as ring blower, vortex blower, and regenerative type turbo-machinery. The blower has its various appearances, configurations, ... design providing continuous operation. Mainly, there are two different impeller stages which falls into single and double. The double ...