- Coarse Screening
- Fine Screening
- Step screen
- Rotary Drum Screen
Above channel (Milliscreen) - Rotary Drum Screen
Below channel (Suboscreen) - Screen Compactor
- Inclined Drum Screen (Versa)
- Curved Fine Rake Screen
- Flat Fine Rake Screen
- Minyscreen
- Externally Fed
Rotary Screens - Centre-Flo Band Screens
- Screen Screw
Compactor – Vertical
- Filtration / Microscreening
- Septage Receiving
and Screening - Grit
- Combined Inlet Works
- Sludge Thickening
and Dewatering - Conveyors and Compactors
- Prefabricated and
Moveable Gantry
Externally Fed
Rotary Screens
Johnson Screens Externally Fed Rotary Screen is ideally suited for process and wastewater streams containing high fats, oils and grease loadings. The system operates by feeding the influent into a headbox, which distributes the flow evenly across the full length of the rear and upper external surface of the rotating drum.
As water passes through the screen, solids are retained on the outside of the screen drum and are carried by rotation around to the front of the screen. A fixed doctor blade (with adjustable tension) removes the solids from the screen. The screened water cascades down inside the drum and falls through the bottom, creating a vigorous backwash action.
This action, together with the use of internal water sprays, has a combined effect of self-cleaning the drum during each revolution.
Contact usnow to discuss your application