Common Questions about Dredges
Q: What kinds of dredges does Crisafulli make?
A: Hydraulic dredges with horizontal auger cutterheads; diesel-hydraulic and electrically powered models.
Q: What sizes do Crisafulli dredges come in?
A: Remote-controlled FLUMP is available in 3" (standard and severe-duty) and 4 inch (severe-duty) pump sizes x 4" or 6" discharge, respectively. The Rotomite SD-110 is equipped with a 4" pump x 6" discharge. The Rotomite 6000 and the Rotomite 6000C are equipped with a 6" pump x 8" discharge.
Q: What is a FLUMP?
A: FLUMP stands for "Floating Lagoon Pumper". It is a remote-controlled dredge. An operator runs the FLUMP from a hand held radio remote control. It is described as an "unmanned" system because no operator is on the floating platform. FLUMPs are typically electric powered.
Q: What is a Rotomite dredge? How is it different from the FLUMP?
A: Rotomite dredges are manned ("operator on-board") self-propelled, steerable dredges that can operate without a support vessel. Normally, these models are Diesel-Hydraulic powered, though a few are offered in "all-electric" customized versions.
Unlike the FLUMP, and most conventional dredges, the Rotomite does not require a cabling traversing system for movement. For the customer's convenience and to increase versatility, Rotomites are designed to operate as either cabled or free standing (not cabled) dredges.
Q: How deep can I dredge with a Crisafulli dredging system?
A: Dredging depths are 10 feet with a standard duty FLUMP and 12 feet with a severe duty FLUMP. The Rotomite SD-110 will dredge up to 12 feet and the Rotomite 6000 will dredge up to 20 feet. Crisafulli's newest model, the Rotomite 6000C reaches a depth of 23 feet. Greater depths are available as custom dredges.
Q: How much material can be dredged with a Crisafulli dredge?
A: FLUMPs can dredge 25 to 80 cubic yards per hour and Rotomites can dredge up to 150 cubic yards per hour.
Q: How far can the dredged slurry be pumped without a booster pump?
A: Typically Crisafulli dredges will pump slurried material up to 1,500 feet, dependent of course upon the site conditions and slurry.
Q: What is a good application for a Crisafulli dredge? Is it right for my needs?
A: Crisafulli dredges are used to dredge a wide variety of materials in both industrial and municipal settings. Crisafulli dredges are installed in some of the world's most demanding environments.
Common applications for Crisafulli Dredges:
- Residuals from potable water treatment plants
- Biosolids from wastewater treatment plants
- Runoff ponds, basins and lagoons
- Mines (for the management of tailings)
- Power plants (for fly ash ponds and sedimentation ponds)
- Refinery and petrochemical wastes
- Processing plants (Food processing; Rendering; Slaughterhouses)
- Metal processing wastes
- Chemical sludges
- Marina and canal maintenance