Screw Conveyer is a kind of continuous transporting machine, which is suitable for powdery, granular and other small materials but not the materials that are sticky, easy to bad or agglomerated. Screw Conveyor has many advantages, such as good seals, wear-resistant, long using period, low noise, easy for maintaining, etc. So, it is widely used in all industries, eg. building industry, eletricity industry, chemical industry, mechanize industry, grains and food industries.