FlexRake® LF

Low Flow

for sites with average flows under 1 MGD, peak up to 4 MGD

The advantage of FlexRake® Adaptive Technology™ for low flow applications

Cost-effective Screening For Low Flow Applications

The FlexRake® Low Flow (LF) model is a pre-engineered multi-rake bar screen available with ¼ inch, ½ inch, ¾ inch and 1 inch openings. It provides automated FlexRake Adaptive Technology™ and is specifically designed for average flows of 1 MGD or less.

Many small and rural communities rely on decentralized treatment systems or operate wastewater facilities that have average flows of 1 MGD or less. This sized plant serves most of the US population. According to the EPA, these communities also face financial resource challenges, workforce issues and lack cost-effective treatment.

The FlexRake Low Flow solves these challenges by offering a simple, affordable, and reliable automated bar screen for preliminary treatment. It incorporates proven Duperon Adaptive Technology™ specifically designed for this application and price point, maximizing value and performance.

Applications:

  • Municipal wastewater

The Duperon®
Difference

The Duperon®
FlexRake® LF

Automated solution

A simple and cost-effective mechanical bar screen option for low flow sites

Proven FlexRake technology

Adapts to a range of unpredictable flow and debris conditions without shutdown or operator intervention

Low cost of ownership

With few parts, a fractional horsepower motor and zero scheduled maintenance, the FlexRake Low Flow is easy to install, own, and operate by your crew

Designed for duty

Pre-engineered and sized to perform in channels, flows, and conditions for small communities

All-inclusive package

Compact system with integral enclosure and standard controls

Safety factor

Designed to handle 4 MGD peaking events to provide peace of mind and performance during wet weather

Read how the FlexRake® Low Flow unit proved resilient during Hurricane Harvey despite handling 20x average flows and 130 mph winds Read case study

Our solutions are simple

Our Solutions Are Simple

More than 80% of treatment plants in the United States are rated for 1 MGD or less. Small community wastewater systems are often resource and budget constrained but their headworks still plays an important role in the treatment process.

The FlexRake® Low Flow was invented to offer a simple raking device that solves the challenges of:

  • Static bar screens that require manual cleaning 
  • High-maintenance cylindrical basket screens 

Small communities no longer have to compromise between manual cleaning or complex systems that require frequent maintenance to stay in service. The FlexRake Low Flow provides another option for simple, affordable, and reliable automated bar screening for low flow sites. It incorporates proven Duperon Adaptive Technology™ specifically designed for this application and price point, maximizing value and performance.

How can we help

Description

The FlexRake® Low Flow is a front-clean, front-return mechanical bar screen. It features the SmartLink™ multifunctional link system, which eliminates underwater sprockets, bearings or tracks that create a fixed path of travel and are subject to fouling and/or jamming. The groundbreaking flex/pivot action of the Duperon FlexRake is unhampered by large debris.

The FlexRake Low Flow is a pre-engineered option for sites with average flows under 1 MGD and peak up to 4 MGD. It is offered in a range of channel widths, depths and bar openings to meet the needs of small communities. Please see above technical specifications for details.

For a complete Low Flow System with washing and compacting click here.

General Specs

The FlexRake® Low Flow is a pre-engineered product line with the following technical specifications:

Typical Applications Municipal wastewater
Average Flow Capacity 1 MGD or less
Peak Flow Capacity 4 MGD
Bar Opening Options ¼ in, ½ in, ¾ in, 1 in
Channel Width Options 12 in, 18 in, 24 in

*Custom closeouts available for other sizing that meets the flow requirements of the Low Flow

Channel Depth Options 2 ft to 6 ft
Maximum Water Level 22 in
Minimum Water Level 0 in
Material of Construction Available in 304 or 316 Stainless Steel

UHMW Scrapers

UHMW SmartLink™

Lifting Capacity 500 lbs
Discharge Rate Every 24.7 seconds
Typical Motor 1/4 hp, TEFC
Utility 1 PH/115 or 230 VAC

3 PH/240 or 480 VAC

Standard Controls Emergency Stop

On-Off

Run Monitoring (Dry Contact)

*Explosion proof controls available

OPTIONAL USE Fecal Breakdown Sprayer

(integrated into pre-engineered design, site preference if used/connected)

Filtered Effluent Screened at/below 150 Micron

100 Mesh Screen

Water Supply Connection ½ in NPT Female Connection
Water Consumption 2 GPM – 4 GPM
Water Pressure 40 PSI – 60 PSI

Key Features

Pre-engineered

Standard features include: easy controls, spray wash for screenings, all stainless steel construction

Tear-drop shaped bars provide highest efficiency in the industry; 25%-50% more efficient (depending on the bar opening)

Thru-Bar™ scrapers clean all three sides of the bar and cross member

Proven Duperon® FlexRake® technology: no lower bearings, sprockets, jam points or confined space entries

UHMW Low Flow SmartLink™ is completely corrosion-resistant, provides long life and allows for “dry” operation (unit can operate when there is little or no water in the channel without damage)

Integral enclosure provides full containment and allowing access thru removable panels

Schematic

FLexRake Low Flow Rendering DIMETRIC

Photo Gallery

Case Studies

Related Products

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Duperon® FlexRake® FP

Bar openings greater than ½ in

In-channel coarse, slotted bar screen with FlexLink™ and UHMW Thru-Bar™ technology. Ideal for ‘sticky’ or matting debris. SSTL construction.

Duperon® FlexRake® FPFS

¼ in – ½ in bar openings

Fine, slotted bar screen with FlexLink™ and SSTL Thru-Bar™ technology. Ideal for ‘sticky’ or matting debris. SSTL construction.

Duperon® FlexRake® IQ2

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In-channel fine or coarse, slotted bar screen with re-imagined FlexLink and Thru-Bar™ technology. Smart Raking™ enhancements, Smart Bar Screen®, and Smart LogIQ™ Sequence of Operations.

Duperon® FlexRake® IQ™

⅛ in – 4 in bar openings

In-channel fine or coarse, slotted bar screen with re-imagined FlexLink™ and Thru-Bar™ technology. Smart Raking™ enhancements and Smart LogIQ™ Sequence of Operations.

You’ll like
working with us

The unit was a perfect fit, and still is. It is excellent… we’ve had no issues at all

Alan Leslie
Contract Operator, Roaring Fork Water & Sanitation District, CO

Tell us about your project

‘You’ll like working with us’ is a commitment and the way we deliver extraordinary customer care for the full life-cycle of your equipment. This is how we strive to earn the privilege to serve your continued screening needs.

Design Collaboration

To build your solution, our engineers take the time to understand your facility, process, and goals.

We’ll combine our team’s experience with water screening, cleaning, and processing with your team’s detailed understanding of your product and process, so we can develop a reliable and cost-effective solution.