Common type unloader, pressure-type, high temperature type three categories. Discharge can drive at a constant speed, according to control the rate of continuous discharge of material, or in uncertain speed drive, the discharge is used as a feeder. Unloader common type: can be used in ambient temperature is usually below 150 degrees on the material and can be continuously and uniformly into the conveying tube feeding, and in the system and separation collecting department, which in turn can be used as a discharge function. Unloader pressure type: It uses closed rotor, can be widely used in suction type, the pressure feed air transportation system and vacuum conveying equipment, rotary discharge airflow pressure can guarantee delivery tube does not leak, can be safely transport and close knot material, so called in this regard square air lock, it can not only withstand, while both common type functions. (1) discharge through the use of planetary rotation principle, the input and output on the same axis, but also directly connected with the motor body is unique, and therefore compact shape beautiful novel, small size and light weight. (2) unloader operation stable and reliable, low noise, less failure, long life, ductile iron teeth engaging member and bearing steel. Good performance, high abrasion resistance. (3) bearings, gear box, away from the body, to avoid the impact of high temperature dust, front cover sealing performance, prevent dust leakage, extend the life of motor parts, the lubrication system. (4) discharge has strong overload capacity, impact resistance, a small moment of inertia for frequent start and turn anyway. (5) For users of special specifications, motors, etc. sprocket discharge, can be made to do so. unloader is ash dust removal equipment, air and other equipment to feed the main equipment for powder materials and granule like material. Category: unloader unloader is divided into A, B-type unloader.