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.


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