pneumatic conveying equipment rotary valve / rotary feeder / air lock In 1999 our company began to ... , 1 machine number, 2 spec. The rotary feeder, which transportation capacity reach 0.5-200 t/h, is used in ... medium multiplicity, powder and granule, Pressure is -0.08----+0.2MPa, temperature range is -30----250. The material ... , can satisfy difference trade, medium, and work status. Rotary valve