Star unloader valve, also known as star cinder, electric lock valve, star discharging device, rotating feeder, lock valves, usually the structure of star-shaped discharge by the number of blades of the rotor with the impeller, housing, seals and reducer, motor and other components. 
 When the upper part of the material by the weight down silo filling the gap between the blades, with blades rotating in the lower part of the unloading, so the star can be quantitatively discharge and continuous discharge. 
 Star-type unloader commonly used in pneumatic output system, output system for pressure or vacuum-output system, the discharge can be a star even, continuous feed to the conveying pipe, in order to ensure energy output of the gas tube, solid stable , so that the pneumatic conveying can work at the same time, but also the discharge device, the lower part of the pressure off and play the role of air lock. Therefore, the star unloader is commonly used in pneumatic conveying system an important component. 
 Star unloader can be used in the system of collection, as the silo unloader. Star unloader is currently the most advanced discharging device, commonly used in dust removal system, dust removal system as one of the important equipment, it is especially suitable for dust, small particles of material, by environmental protection, metallurgy, chemicals, grain, cement , roads, drying equipment and other industrial projects based on merit. 
 Star unloader of the upper and lower flange port is basically a square or round, can also be selected by the user. 
 Wear-resistant closed impeller rotor type discharge device of this type of star is characterized by the rotor blade tip seal lining of polyvinyl fluoride, can guarantee the blade tip and the shell wall has a good touch, and wear can be easily adjusted after the end of the blade, it is still inside the shell to maintain good contact with the air lock better performance. 
 Temperature-based delivery of materials it can reach 280 ° C temperatures at both ends of the bearing and the impeller have a certain isolation, to prevent the ultra-fine powder and bearing contact. High temperature type unloader conveyor material temperatures up to 500 ° C, using sprocket connected, Shell gear and discharge a certain distance.