Piranha Dredges
Automated & Remote Control
Dredge Pumping Systems
3 inch to 8 inch 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 manufacturer’s 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 250 cubic yards
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 2.5” diameter.
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
Manufacturing & Sales: Albuquerque, NM
Phone: (505) 822-0449
Fax: (505) 858-0171
Email: sales@piranhapump.com
Dredge
Model
PDF File
Download
Solids
Size
H.P.
Discharge
Shut Off
Head
Max.
Volume
Avg Production
cubic yards/hr
P-5
PDF
3/4"
5
3"
48'
275 gpm
25
P-10M
PDF
1”
10
4”
67’
400 gpm
40
P-20
P-20 Auto
PDF
PDF
1.5”
20
4”
90’
700 gpm
70
P-30
P-30 Auto
PDF
PDF
1.5”
30
4”
119’
700 gpm
80
P-50
P-50 Auto
PDF
PDF
2.5”
50
6" & 8”
98’
1800 gpm
175
P-75
P-75 Auto
PDF
PDF
2.5”
75
6” & 8"
130’
2100 gpm
225
Additional Videos:
(click on model number)

Model
P-10-M
P-20
P-30
P-50 #1
P-50 #2
P-50 #3
P-75 #1
P-75 #2
P-75 #3
P-75 under water