Screw Press Components
Every part of a screw press dewatering system explained
A screw press is more than a screw and a screen. Explore each mechanical and process component — from the auger shaft and self-cleaning ring stack to drive units, back-pressure devices, and polymer dosing — and understand how they work together to dewater sludge reliably.
Components & Assemblies
Screw (Auger Shaft)
The screw is the central conveyance element of a screw press: how the tapered auger shaft transports and compresses sludge for dewatering.
Screw Flight
The screw flight is the helical blade that conveys sludge along the shaft. Learn how pitch and profile control compression and throughput.
Filtration Screen
The filtration screen separates filtrate from solids. Learn how the multi-disc ring screen enables self-cleaning operation without filter cloth.
Screen Basket
The screen basket is the cylindrical ring stack surrounding the screw. Learn about its assembly, ring spacing, and role in dewatering.
Fixed Rings
Fixed rings form the stationary part of the multi-disc filtration stack. Learn how they define the filtration gap and support dewatering.
Moving Rings
Moving rings are the floating rings driven by the screw that keep the filtration gaps clear. The core of the self-cleaning principle.
Drive Unit
The drive unit rotates the screw at low speed and high torque. Learn about its components and role in reliable dewatering.
Gear Motor
The gear motor combines an electric motor and reduction gearbox to drive the screw at low speed. Sizing and efficiency explained.
Back-Pressure Plate
The back-pressure plate regulates cake dryness by controlling discharge resistance at the outlet of the screw press.
Back-Pressure Cone
The back-pressure cone is an alternative discharge restrictor that builds pressure for drier cake at the screw press outlet.
Flocculation Tank
The flocculation tank mixes sludge with polymer to form flocs before dewatering. Design, mixing, and residence time explained.
Sludge Inlet
The sludge inlet feeds conditioned sludge into the screw press thickening zone. Feed control and design considerations explained.
Filtrate Collection
The filtrate collection tray captures water separated from the sludge and returns it to the treatment process.
Wash Water System
The wash water system periodically rinses the screen to keep gaps clear. Low consumption compared with belt presses explained.
Polymer Dosing System
The polymer dosing system prepares and doses flocculant to condition sludge. Make-up, ageing, and dosing control explained.
Control Panel
The control panel houses the power and control electronics for the screw press and its ancillary equipment.
PLC Control
PLC control automates the screw press: coordinating feed, polymer, screw speed, and wash cycles for unattended 24/7 operation.
Sludge Cake Outlet
The sludge cake outlet discharges the dewatered cake from the screw press to downstream handling equipment.
Conveyor Interface
The conveyor interface connects the screw press cake outlet to downstream cake transport and storage equipment.
Flocculation Tank & Connections
Integrated flocculation with mixer drive, polymer piping and flanged filtrate outlets for straightforward installation.
Explore the RF seriesReady to Find the Right Screw Press?
Our engineering team provides application-specific screw press sizing and selection — based on your sludge type, flow rate, and dewatering targets.