Major Components of Crisafulli's Dredges

Made in Montana

60 years of experience building pumps. Crisafulli has engineered and built pumps for more than 60 years and started business as Crisafulli Pump Company. Crisafulli pumps are proven reliable and effective. Crisafulli builds pumps in sizes ranging from 2 inch (the diameter of the discharge pipe on the pump) to 24 inches.

Rugged construction. The Crisafulli pumps used on the FLUMP and the Rotomite are American made in Glendive, Montana, manufactured with an ASTM AR400 mild carbon steel (BHN 400 hardness) pump volute and impeller, dual carbon/ceramic shaft seals. The pump is mounted directly behind the cutterhead and is lowered into the pond on the dredge's ladder.

Floating Discharge

To carry the dredged sludge from the FLUMP or Rotomite to the designated disposal site, typically on land, the FLUMP uses a Crisafulli Integral Floating Discharge Line. The Discharge Line is modular, offered in either 15 foot or 20 foot rigid lengths, and 5 foot flexible lengths, and is one of two styles: aluminum pipe with foam floats; and polyethylene pipe with foam floats.

The Crisafulli Floating Discharge Line system is highly versatile, easy to set up and use, and can carry heavy, concentrated sludge across a pond to the discharge site, distances often up to 500 feet or substantially farther.

Rotomite Propulsion

Crisafulli's hydraulically powered propulsion and steering system for the Rotomites is unique in the dredge world. Providing both thrust and steering, the System provides adequate force to enable the horizontal auger on the cutterhead to engage, cut, and dislodge compacted solids.

Unlike propulsion systems on many competitors' dredges, that either crawl along the lagoon bottom thereby generating substantial turbidity, or drive one or more "spuds" into the lagoon bottom that must be removed and the dredge relocated repeatedly by a support vessel during the dredging process, the Crisafulli propulsion system generates little or no turbidity and enables the Rotomite to be self-sufficient and move easily around the lagoon, canal, or river without external support. The System provides both forward and reverse thrust. Rotomite propulsion systems are more flexible and versatile enabling Rotomites to be more productive and less costly to operate.

Remote Control

User Friendly Radio Remote Control

  • Works in the rain
  • Dredge depth readout on the transmitter (Optional)
  • Frequency hopping

Daylight visible dredge status lights can be seen from a distance; in full sunlight.

  • When electrical power has energized the dredge.
  • When the operator has control of the dredge.
  • When the dredge motors are on.
  • When there is a fault.
  • When the cutterhead is jammed.

Flump Pivoting Traverse

Dramatically reduces down time. Crisafulli’s unique pivoting traverse allows the entire FLUMP to pivot 180 degrees within one minute at the end of each forward dredging pass. Without the Crisafulli Pivoting Traverse, operators spend much time repositioning the dredge between dredging passes when a dredge is run on a cabling or rail traverse system. While some dredge makers claim full pumping rates when their dredges move backwards, few if any achieve 100% efficient dredge operation in reverse.

Pivot forward, and work faster. View the system in action.

Cabled Traverse System

The unmanned FLUMP dredge, or the Rotomite, when operated in a cabled traverse system, are positioned and moved, either manually or automatically, along a tensioned galvanized steel cable extending across the lagoon or pond. The cable is attached at either end of the lagoon or pond to a galvanized steel cable affixed to sturdy steel posts set firmly in the ground (generally in concrete foundations). This form of traverse system is built with either two or four posts. Lateral positioning of the FLUMP is either manual, or electric by shore based electric winches.

Custom Cutterheads

If you have a unique dredging problem, Crisafulli engineers will work with you to create a custom solution for your application.

Liner Protection

Crisafulli has a simple liner protection system to keep the cutterhead away from expensive liners. There are wheels that allow the cutterhead to ride along the bottom of the pond without digging in, as well as a cage to keep the teeth away from the liner.