E Escalator™ Perforated stainless steel screen panels are carried on heavy-duty chains and incorporate holes of 6 mm (1/4'') or 3 mm (1/8'') diameter giving fine screening in any direction. Screening and Separation R ROTOPAC™ The Rotopac™ is a simple device for dewatering and compacting the screenings collected on bar screens and fine screens. Screening and Separation W Whittier™ L’EAU CLAIRE Veolia’s L’Eau Claire™ is an up-flow deep-bed media filtration technology designed for the effective removal of fine solids, colloidal silica and color. Filtration