Screw Screen – S-SC and TS-TSC
Depending on the type of application, there are two different versions: screw screen directly installed in the channel S-SC or, screw screen supplied complete with tank TS-TSC, with liquid inlet and outlet flanges and, at request, with lateral by- pass screen. For both models, you can choose the version with or without compacting zone.
The main advantages of these models of machines are mainly the low cost of initial investment and the subsequent little maintenance required. The construction of the machine can be specified as either AISI 304 or AISI 316 Stainless Steel. The standard machine is installed in an inclination of 35°, however, can be provided up to a maximum inclination of 48°.
The screw screens, of any model, lend themselves to a large variability of customisations, to make every application highly functional.
Operating Principles
The semi-circular screen retains solids as the liquid passes. The solids clog the holes and cause a rise in the level of the effluent causing a differential between the level of the upstream and downstream. Generally, a sensor provides the auger start signal by detecting the increase in absolute or differential water level. As the auger rotates, brushes fixed on the lower part of the auger, clean the screening profile. The auger then transports the screenings to the compaction area. Compaction is achieved by reducing the auger pitch. The compacted solids exit the screen out the discharge chute.
The screw screen can be provided for direct installation in a concrete channel or in a stainless steel tank with effluent inlet pipe connection.
In summary
- Screen retains solids as liquid passes through
- Rotating auger with fixed brushes cleans the screening profile
- Auger transports the screenings to compaction area
- Installed in concrete or stainless steel tank