... Good sealing quality and rigidity. 4. High capacity. Introduction:LS series screw feeder is suitable for conveying powdery materials, granular ... , coal, machinery, light industry, grain and food industries.LS series screw feeder is not suitable for conveying perishable, sticky ... agglomerating materials. In general, the working environment temperature for LS series screw feeder is between -30 and 50°c, ...