RSS Type
They lend themselves to operating with sands rich in fine fractions as they are equipped with an auger of considerable length. Semi-cylindrical steel sheet tank and cups with slot perforation. Machine complete with loading ports and sand discharge port.

Type RSR
Specific machines for use with high turbid flow rate and, when required, high recovery of fine sands. They are equipped with symmetrical augers and double drains.

RLS Type
In addition to the backwash function with countercurrent clean water input, they also have an auger to operate efficiently with fine-rich sands, the recovery of which is excellent.

LSS type
They perform sand rinsing by tank exchange co inlet of countercurrent clean water. Since they are not equipped with an auger, they are recommended for treating coarse sands or in cases where removal of excess fines is desired.