The TQSF series of Gravity De-stonner are mainly used to classify and eliminate stones from the materials of pellets, like wheat, rice, soy bean, etc. Features of the Gravity De-stonner TQSF: 1. The Gravity De-stonner has the design of invert blowing board to advance the efficiency of eliminating stones. 2. The Gravity De-stonner adopts the drive of double vibration motors to make itself work in a wonderful running situation.