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
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.
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, EPNV |
| 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
Photo Gallery
Downloads
Case Studies
Hurricane Harvey District Case Study
FlexRake® bar screens at 24+ sites around Houston were unaffected by Huricane Harvey
Roaring Fork Water & Sanitation District Case Study
FlexRake® Low Flow automates screening and eliminates downstream maintenance for a Colorado Sanitation District
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Duperon® FlexRake IQ2®
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Duperon® FlexRake® FP
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Duperon® FlexRake® FPFS
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Duperon® Low Flow System
Low Flow System
RFQ form
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.