RHEWUM America | The sieve manufacturer that meets your requirements. RHEWUM is an independent family owned company which was founded in 1927 as the Rheinische Werkzeug- und Maschinenfabrik. We have been developing and manufacturing screening machines and vibrating feeders since the beginning of the 1950s. These include the entire field of dry and wet screening machines which are used for a vast variety of applications by leading companies worldwide. Optical sorting is the logical extension of our activities for the future. Our customers' requirements provide us with both a benchmark and challenge - a continuous and economic production of well defined screening machines in reproducible qualities. With our screening and classifying technology, our customers can offer the finest quality products and are always one step ahead of the competition.