8" Black Hole Dredge

Your limitless solution for quick Mobilization.

The Black Hole 8-inch dredge Is designed for higher capacity hydraulic supplies that enable a dredge Inlet vacuum up to 15.3 in/hg (52 kpa) at 3000 psi and 80lpm.
The Vortex Black Hole 8-inch is designed for Subsea excavation and disposal of seabed materials up to 150 millimeters in size.

It can be mounted to any Work Class ROV and requires no ship deck space and sea fastening. The VortexBlack Hole 8-inch is very powerful, has no depth limitations and is quick and easy to mobilize and operate.

• Removal rates* based on actual material moved during testing using Magnetite black iron sand and rocks weighing 2.375 kg per liter
* 120 to 128 plus ton / hr
* 58 to 60 plus cubic meter / hr
* 10 plus % solids by volume
• Hydraulic supply required: 85 lpm (22.4 gpm) and 206 bar (3000 psi)
• Hydraulic hoses supplied:
Pressure and return = 4 mtr long, 4000 psi (275 bar) rated. -12 jic female swivel ends.
Case drain = 4 mtr long, 1000 psi (68 bar), -6 jic female swivel ends
• Suction capabilities = 32 kpa (9.4 in/hg) using 85 lpm and 206 bar
• Pump weight in air 111kg (complete pump unit)
• Pump weight in Seawater 89 kg (complete pump unit)
• Suction hose diameter = 202 mm
• Actual internal dredge diameter = 200 mm
• Potential debris diameter = 198 mm
• Shipping box = 2360 mm L x 590 mm W x 900 mm H.
• Weight = 300kgs complete kit

8" Black Hole Dredge Info

Dredging in action

We offer a wide range of dredging solutions to suit most deep sea applications. The below graph shows our current selection of dredge solutions from the Electric 2 1/2 inch, to the larger BLACK HOLE 8 inch dredge.

We can also tailor a dredge solution to specifically suit your hydraulic supply if by chance your requirements are not covered by our extensive range. If you require a custom dredging solution please contact us directly.

Tornado 4" Dredge MkII

With a proven suction inlet vacuum up to 29.5in/hg (100kpa), the patented Vortex 4in T-100 Tornado Dredge is designed for subsea excavation and disposal of seabed materials up to 99mm in size.

Vortex 4" Dredge Pump

The most powerful 4-inch ROV and diver dredge in the world at 97kpa (28in/hg) vacuum has removal rate performance more commonly seen in 6-inch dredges.

Hurricane 6" Dredge

With a suction inlet vacuum up to 15.3in/hg (52kpa), the patented Vortex 6in Hurricane Dredge is designed for subsea excavation and disposal of seabed materials up to 149mm in size.

Why is Vortex Dredge Superior to other ROV Units?

Vortex dredges have been designed to combine high suction values and high water volumes to tear up sticky soils with very high suction then keep it flowing with high water volume. Powerful, simple, effective.

Example: Getting a "RIDICULOUSLY THICK MILKSHAKE" ® ™ to move through a straw is similar to dredging a very sticky seabed and suction is key because if you drive a suction hose deep into sticky mud the water flow in the suction hose will often stall and the hose is essentially filled with a 'plug' of mud and only high suction will clear the hose. Once the hose is clear then water flow takes over.
Suction does the work and water flow continues the work done.

VORTEX performance figures DO NOT have a small print clause with an Asterix symbol next to figures which would represent "best case Scenario" removal rates as opposed to actual removal rates.

VORTEX removal rates are ACTUAL removal rates as seen with actual material moved using Magnetite black iron sand and rocks weighing 2.375kg per liter as to the sample product.