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RHEWUM sets new record for durability

21.09.2021, Remscheid

RHEduo® active screening fertilizer for 40 years

It was in 1977, that our Japanese license partner Sintokogio first installed a RHEduo®, known today as RHEduo®, in a Russian fertilizer plant. The RHEduo® is a double frequency screening machine: Two unbalance motors, respectively fixed at the inlet and the outlet, operate at different frequencies, which leads to the RHEduo®'s unique motion pattern. Double frequency screening machines use a large amplitude at the inlet to loosen up and quickly transport material, at the outlet a high frequency achieves precise separation. In its modern version, the RHEduo® has many industrial applications and is used to screen potash, minerals, fertilizers and many other different types of material down to fractions of 0.5mm.

The 1977 machine, an old RHEduo®, was used to separate ammonium nitrate, a chief ingredient in fertilizers and technical explosives. The chemical properties of ammonium nitrate make it one of the most demanding materials to screen: Ammonium nitrate not only tends to attract moisture, agglomerate and clog the screening mesh, if not handled correctly, it is also highly explosive.

The double frequency motion of the RHEduo® actively works against adhesive forces while achieving precise separation of the desired fractions. The RHEduo® is also resistant to heat generated by the screening material, up to 450°C, and conforms to the ATEX and FDA standards.

The indestructible properties of this reliable machine type have earned the RHEduo® a reputation for being exceptionally robust and durable even among the high-quality RHEWUM screening machines. It is not uncommon for customers to ask for, and receive, spare parts for RHEWUM machines that have been in operation for decades. But a request to exchange a machine that had been in operation for over 40 years still was unusual!

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