Rotary valve,Rotary feeders: 1.Better sealed performance 2.Tight structure 3.ISO9001:2008 Rotary airlock feeders have wide application in industry wherever dry free-flowing powders, granules, crystals, or pellets are used. Typical materials include: cement, ore, sugar, minerals, grains, plastics, dust, fly ash, flour, gypsum, lime, coffee, cereals, pharmaceuticals, etc.Industries requiring this ...