... need for lubrication 3) No oil leakage SFJY series Rotary vibration sieveFunction and Characteristic: 1. High efficiency, compact design and ... flying, may be screened to 500 mesh or 0.028mm. 4. Impurities, coarse automatic discharge, can be a continuous operation ... machine, its low noise, high efficiency, quick changer take 3-5 minutes, totally enclosed structure for grain, flour, mucus and other ...