... equipment Air Lock / rotary feeder / rotray valves Air Lock / rotary valveIn 1999 our company began to introduce the special technology from Sanko Air Plant Ltd ... , GRL, GRV, ROD, RVB, HR, GR*, AGR*, MGR*(*IS Sanko Air Plant Ltd technology). GRL, GRV, ROD, RVB have 28 machine ... and etc, can satisfy difference trade, medium, and work status. Air Lock