Our starchvacuum filter is specially for dewatering cassava, potato, sweet potato slurry. for a long time till presently we mainly relay on centrifugal power to separate starch from starch slurry and we make a signifigent progress, capacity larger and larger, operaton becomes easier. But we see danger centrifugal power rotory speed and comparatively much higher power consumption. We now prefer to the new method of vaccum power. Its speed is lower and safer, power consumption also much lower. We are making progress on that and make excellent results in a balanced and economical way.