Heliscreen

The Heliscreen® is a compact powered CSO screen with the ability to operate under surcharged conditions. With low headloss and a small footprint, the Heliscreen® is ideal for retrofit installations with hydraulic or physical site constraints.

How it works:
Flows enter the chamber causing water levels to rise, initiating the rotation of the helical brush mechanism on the influent side of the screen, and begins to flow through the Heliscreen®’s semicylindrical stainless steel perforated screen (red arrow). The spinning helical brush scrubs solids away from the screen and into the continuation flow while the effluent is discharged over the weir to the spillway (blue arrow). The screenings and continuation flow are carried on to the wastewater treatment plant for treatment (brown arrow). As the water level continues to rise, spill flow and continuation flow pipes may become surcharged. Excess flows are bypassed over the back plate overflow weir. The powered motor of the Heliscreen® is Zone 1 rated IP68 to ensure that, unlike most CSO screens, the device will continue to operate even in the event of surcharges.

Advantages of the Heliscreen:
• 100% of screenings are retained on the foul side of the overflow weir.
• 6 mm in two direction screening.
• Operates under surcharged conditions.
• Low headloss.
• Compact design.
• Handles high concentrations of screenings.
• Self-cleansing.
• Easy to install and maintain.

For more information about this product, look at the datasheet.