This machine is suitable for various powder material, the grain and small pieces material, for instance coal powder, grit, lump coal and grit, cement, cereal…etc., not suitable for transporting easy rotten, great viscidity, easy caking materials. Spiral conveyer should work in ambient temperature range - 20 - +50 ºC , temperature of transport material low at 200 ºC, 20 degrees of largest inclinations.