Contra-Shear Wastewater Screening Products.pdf - Johnson Screens

Centre-Flo ScreenThe centre-flo travellingband screenThe Centre-Flo screen is an in-channel,‘in-to-out’ type travelling band screensuited for screening water and wastewater. The design is unique and wellsuited for high flow rates with narrow anddeep channels, where other types ofscreens will not easily fit.Its modular design integrates screening,washing and dewatering of screenedsolids in a single compact unit.The Centre-Flo screen belt isconstructed of ultra high molecularweight polyurethane (UHMWPE) guidelinks and stainless steel grids, separatedby spacers that prevent any metal-onmetalwear.The influent enters the Centre-Flo systemand undergoes a 90 degree change indirection as it flows through thecontinuously moving screen belt.Stainless steel hooks, which areinterspersed within the grid assembly, liftthe solids that are greater than theopenings and drop them into a centralflume located at the top of the machine.A set of two sparge pipes with nozzlesspray water and dislodge solids that aretrapped in the screen belt. The solids arethen directed out of the screen into ascrew conveyor or screw press, througha flume system where they can be dewateredand compacted as required.The Centre-Flo travelling badn screen iscapable of handling flows of up to28,530 gpm (6,480 m³/hr) through asingle unit. Vee-Wire ® screen andperforated plate screen panels are alsooffered based on requirements.Features and Benefits• Slots range from 0.12 to 1.0 in. (3 to 25 mm)• 304SS or 316SS construction• Guide links are constructed of UHMWPE• Compact, modular, in-channel design• Combines screening and solids handling within a single unit• Low and consistent head loss• Self-cleaning operation• Low power consumption and operating costs• All maintenance conducted outside the channel and above the deck