... Fan is also called rotary valve, air lock, usually is the structure of star, is made up by some ... chute smoothly and continually, to assure that the ratio of air and and solid in the pneumatic system, the ... and differential pressure.Large inlet/outlet: Without restriction of the cross section for highest capacityDrive mode: Chain drive ... : FC, 304,316,304L, 316L Backpack supply air type of rotary valve