The air lock, also known as ash dischargevalve, air shutoff fan, and rotary feeder, iscomposed of a rotor impeller with severablades, a casing, a seal, a reducer, a motor,etc. Inlet and outlet flanges . The air lock isgenerally installed at the lower part of theflour hopper of the dust collector, which ismore convenient to operate. The device isthe main equipment for flour discharge, airsupply and other equipment feeding of thedust removal equipment. lt is suitable forpowdery Materials and granular materials.