Piranha Pumps & Dredges: dewatering, slurry, solids, floating pumps

Industrial Dredges

Piranha Dredges
Automated & Remote Control
Dredge Pumping Systems
3" to 8" discharge

Portable electrically driven  remotely controlled dredges feature powerful agitator pumps that are so effective, they excavate material faster than diesel auger-style dredges many times their size. Piranha dredges are ruggedly constructed yet compact and portable. Our pumps feature high chrome iron wear parts, heavy duty motors and a unique external mechanical agitator. Other manufacturers dredges skim materials off the top of your sediment layer, pumping excessive amounts of water with low solids content. Piranha dredges excavate from within the core of your material. Piranha portable dredges are available in 6 models, with production rates up to 230 cubic meters of excavated solids per hour. Piranha dredges are equipped with severe duty hi-chrome iron slurry pumps capable of withstanding long term wear from  pumping high concentrations of gravel, sand, crushed ore, coal slurries, fly ash, bottom ash, and rock up to 63 mm diameter.




Size mm


Shut Off
Head   meters
        Volume         liters per minute
Avg Production 
cubic meters per hour
19 5
15 1040 19
25.4 10
20 1510 31
P-20 Auto
P-20 Auto
38 20
27 2650 53
P-30 Auto
P-30 Auto
38 30
36 2650 61
P-50 Auto
P-50 Auto
63 50
6" & 8”
30 6800 134
P-75 Auto
P-75 Auto
63 75
6” & 8"
40 7950 172


The Piranha dredge is a remotely controlled floating dredge pumping system capable of excavating gravel, sand, crushed ore, coal slurries, fly ash, wash fines, mud, and sewage & water treatment sludges. Our systems are furnished complete with everything necessary for a fully functional system.

The system includes:

Pump: Our severe duty high chrome iron slurry pumps are powered by 1.35 service factor motors enabling them to handle heavy concentrations of highly abrasive slurries. The pump intake and agitator are surrounded by a protective frame rendering it useful for lined ponds.
Flotation Platform: Foam filled UV and chemical resistant HDPE pontoons, urethane powder coated steel structural members, depth control hoist with high and low level limit switches.
Remote Control Positioning System: Comes standard with a capstan traversing winch remotely controlled from shore via the master control panel.
Control Panel: Skid mounted onshore remote control panel with push button controls for automated & manual operation with: pump run hour meter, pump motor ammeter, LED depth readout, traverse functions forward/stop/reverse, pump elevation functions raise/stop/lower with manual override for high and low level limit switches, pump seal moisture indicator light, and pump motor over heat indicator light.
Floating Discharge: Each assembly consists of a section of rigid pipe, foam filled floats and a flexible hose section with quick disconnect couplings at each transition point.

Electrical cable: Heavy jacketed, submersible, power and control cable.

Delivery & Startup: We deliver to your job site and furnish a service technician for startup.

The heart of the Piranha dredge is our heavy duty submersible agitator pump. The mechanical agitator delivers kinetic energy (energy of motion) to solids surrounding and below the pump rendering these solids in a fluid state.

For more stubborn sediment, the Power Jet Ring delivers even more energy and influences a larger area of sediment. These solids are then drawn through a suction strainer, preventing the entry of material too large that may otherwise have difficulty passing through the impeller vanes.

The surface area of the suction strainer is much larger than necessary to provide adequate flow to the pump. This allows the larger objects to collect on the strainer without affecting pump performance. Most of this material falls away when the pump is shut off, minimizing annoying delays in production for strainer cleaning.

The mechanical agitator is surrounded by an open fabricated frame which inhibits contact with pond liners as well as immovable objects such as tree stumps and large rocks.

The pump wear components are generous machined castings of 28% high chrome white iron for long term abrasive wear resistance. Multistage seal assemblies prevent water and particle migration to the motor. A seal moisture sensor activates an indicator light on the master control panel suggesting the need for a seal inspection. The outboard seal integrity may be easily checked via the removal of an external 4 bolt plate.

The motor temperature is monitored by an internal sensor which also activates a control panel indicator light in the event of an over temperature condition. The motor cable entry area is encased in an epoxy compound which prevents water entry to the motor in the event of a breach in the outer cable jacket.



Piranha Pumps & Dredges
Ph.: +1 (505) 822-0449

+38 (050) 638-7576



Sales: Central, Eastern Europe & the CIS
Tel.:  +38 (044) 465-5082

Viber / WhatsApp:   +38 (050) 638-7576