Chain and Rake Screen – Duperon
Open Channel Screening Technologies
The open channel environment offers some of the harshest conditions – and debris – in the screening market. Duperon has spent more than twenty years developing solutions to waterflow issues at open channel intakes to assure continued flow when it’s most critical.
- Assures Continued Flow – Even Through Heavy Storms – without Interruption or Shutdown
- No Lower Sprockets, Bearings, Tracks or Guides that Require Underwater Lubrication
- Continually Cleans Across Entire Intake
Duperon® FlexRake® FRHD: Heavy Duty Coarse Screen
A front-clean, front-return, mechanically cleaned bar screen technology
Utilizes A36 steel with Duperon® standard coating or hot-dipped galvanized; also available in 304 and 316 stainless steel
Available with 2 inch – 4 inch openings
Duperon® FlexRake® FRHD Features & Benefits
Continuous Cleaning
Continually cleans across the entire intake with multiple scrapers (no cycle times, no clogging).
Low Maintenance
With no lower sprocket, FlexRake® technology allows all maintenance to be performed from the deck; no jam points underwater to require diving or confined space entry.
Long-Life Durability
Original FlexLinkTM multifunctional link system – with 5 lb. stainless steel cast links and an ultimate strength of 60,000 lbs. – provides unmatched durability. Many systems have been operating for more than 20 years.
Full Range Adaptability – Unhampered by Large Debris
Jam EvasionTM technology allows the FlexLinkTM multifunctional link system to lift and pivot around debris. This allows FlexRake® technology to adapt to a wide range of debris variations.
Energy Efficient
The low horsepower requirements of the Sumitomo drive system ensure low-cost, energy efficient debris removal.
Duperon® FlexRake® FRHD General Specifications
Typical Applications:
- Open channels, water intakes, coarse screens, irrigation canals, stormwater pump stations, flood control, hydroelectric
Unit Width:
- 2 feet to 12 feet
Unit Length:
- 10 feet to 100 feet
Angle of Installation:
- Standard: 30 degrees from vertical
- Range from vertical to 45 degrees, dependent upon site conditions.
Standard Materials of Construction:
- A36 Steel, with Duperon® Standard Coating or hot-dipped galvanized
- Also Available: 304 and 316 Stainless Steel
Bar Opening:
- 2 inches – 4 inches
Scraper Configuration:
- Serrated scraper
Standard Controls Options:
- Packages range from simple start/stop to sophisticated automation. Motor overload protection provided. Contact Duperon® for further details and assistance in selecting the perfect package for your site.
Operation Options:
- Continuous/Manual
- Automatic with timer, float, SCADA, differential/high-level sensing options with I/O as needed.
Duperon® Self-Cleaning Trashrack
For the toughest debris conditions, the Duperon® Self-Cleaning Trashrack easily handles heavy vegetation, large refuse, logs and other harsh, rugged debris. The front-clean, rear-return technology is able to stand idle for long periods, yet still reliably start whenever a storm or rain event occurs. Independently operating chain strands offer built-in redundancy and continuous operation when it’s most critical.
Duperon® Self-Cleaning Trashrake General Specifications
Typical Applications:
- Large/high volume open channel conditions, hydroelectric, co-generation, nuclear power plant, flood control, stormwater, water intake, pump stations, diversion dams
Unit Width:
- 5 feet to 10 feet
Unit Length:
- 10 feet to 100 feet
Angle of Installation:
- 30 degrees
Bar Opening:
- 2 inches at the bars and 3 inches at the chain path
- Other options also available
Standard Controls Options:
- Packages range from simple start/stop to full automation. Motor overload protection provided. Contact Duperon® for further details and assistance in selecting the perfect package for your site.
Operation Options:
- Manually, timed sequences, or head differential.
- Auto operation available for remote locations.
Duperon® Self-Cleaning Trashrack Features and Benefits
Low maintenance:
Few moving parts, with no pins to shear, brakes, clutches, or other frequently replaced parts. No underwater bearings or sprockets; bearings are sealed and self-lubricated.
Energy Efficient:
Low energy consumption is required with the Duperon® Self-Cleaning Trashrake’s low horsepower motor.
Built-In Redundancy:
Each chain operates independently, assuring continuous operation. Self-Tripping Mechanism assures that the screen will be continually cleaned, even in the presence of overlarge and bulky debris.
Reliability:
The Duperon® Self-Cleaning Trashrake was created with remote locations in mind, and designed to assure efficient, immediate operation during storm and rain events – even if the unit has been sitting idle for some time.