Home Product Cleaning & Conditioning Drum Sieve DRUM SIEVE Rotary screening action. Uses a rotating drum with perforated screens to separate oversized impurities. Efficient separation. Effectively removes larger foreign materials such as straw, sticks and other unwanted particles. Protects downstream equipment. Reduces the impurity load on subsequent machines and ensures smooth processing. Improves grain quality. Provides cleaner wheat for the next stage of processing.