The RAM type is usually used in the biological treatments for the sewage aeration or for the aerobic sludge stabilization. The rotor unit consists of a sturdy gear motor, a flanged steel pipe on which the lamella crowns are bolted, a flexible gear-rotor joint, two lateral supports consisting of adjustable roller bearings provided with water sprays and end spray guard flanges. On request, the aerator can be supplied complete with double polarity motor for the optimization of the peripheral speed of the blades according to specific requirements. During the rotor rotation, the lamellae are partially immersed in water and their motion involves the lifting of very fine water drops which, also thanks to the wide surface of contact with the air, are enriched with oxygen. On request, a cover can be supplied for the protection of the whole equipment and thus avoid uncontrolled water sprays.
The standard execution provides for the lamella crowns, lamellae and spray guard flanges to be hot dip galvanized after pickling, while the other components are protected against the corrosion with an epoxy painting cycle. On request it is possible the realization in stainless steel.