Raw Water Intake Screens

Applications

Stormwater and Combined Sewer Overflow (CSO) Control

Prevents solids and debris from entering natural water bodies during storm events, ensuring compliance with environmental regulations.

Retention Tank and Wastewater Treatment Plant Protection

Retains solids at overflow points, reducing pollutant loads and improving treatment efficiency.

Urban and Industrial Drainage Systems

Enhances stormwater management in municipal and industrial settings by intercepting solids before discharge.

Refurbishment of Existing Infrastructure

Easily integrated into existing overflow weirs and retention systems to improve solids separation without major modifications.

Benefits

High Solids Retention & Low Hydraulic Resistance

Efficient two-dimensional screening captures solids while allowing high flow rates with minimal headloss.

Automatic Self-Cleaning & Low Maintenance

Integrated brush and screw mechanism ensures continuous cleaning, reducing manual intervention and maintenance.

Flexible & Reliable Operation

Can be installed on either side of the overflow weir and operates efficiently even at low flow rates without blockages.

Durable & Environmentally Friendly

Robust stainless steel construction ensures long-term reliability while preventing pollution in receiving waters.

As material accumulates in the baskets, the differential pressure across the screen increases, gradually lowering the downstream water level. A level sensor continuously monitors the water levels upstream and downstream. Once the downstream level falls below a set point, the PLC control system triggers a wash cycle.

During the wash cycle, the screen rotates while a series of wash jets direct accumulated debris into a central launder for collection and disposal. The clean screen surface then returns to the feed channel, and the wash cycle continues until the downstream water level stabilises.

Flootech Dual Flow Basket Filters offer several advantages over traditional intake screens. A key benefit is their ability to handle variable water levels, making them particularly well-suited for seawater intake systems. Additionally, they provide superior filtration performance compared to conventional intake screening solutions, achieving filtration down to 0.2 mm.

The Flootech Rotary Drum Basket Filters are designed for preliminary filtration and gross solids removal, filtering particles as small as 35 microns. Water enters the holding tank through the centre of the drum, passes through the filter to the outside, and then flows over a weir within the holding tank before being discharged.

The washing cycle, controlled by a timer, typically operates for 10% of the total runtime. External wash jets clean the filter, directing debris into the central collector for disposal via the discharge pipe. The clean screen surface then returns to the feed channel, and the wash cycle continues until the downstream water level stabilises.

Flootech Rotary Drum Filters offer several advantages over traditional drum screens, including a high surface area relative to the installed tank volume (m²/m³), made possible by the drum’s unique design. This results in significant capital and operational cost savings compared to conventional technologies.