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The “Watery Discharge” Nightmare
If you’ve ever stood at the end of a discharge pipe and seen mostly clear water coming out while your fuel costs skyrocket, you know the frustration. In dredging, volume isn’t the goal—density is. Most standard submersible pumps fail because they rely on simple suction. But when you’re dealing with compacted sediment, fly ash, or thickened tailings, suction alone isn’t enough to “lift” the solids. This is where the engineering behind the Tussu®HTU Submersible Dredging Pump series changes the game.
1. The Agitator: Breaking the “Crust”
The biggest reason for low-density discharge is settled solids. Over years, sand and silt pack down into a hard layer that standard pumps just slide over.
The Tussu Submersible Slurry Pump doesn’t just wait for material to enter the suction mouth. It’s equipped with a high-torque, High-Chrome (27%) Agitator.
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How it works: This isn’t a decorative blade. It actively stirs and liquefies the settled material, creating a high-concentration slurry “cloud” right at the intake.
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The Result: Instead of sucking 10% solids, you’re suddenly moving 40% to 60% concentration. You’re moving more material in one hour than a standard pump does in four.
2. Why Hydraulic Power Beats Electric for Density
We often get asked: “Can’t I just use a bigger electric pump?” The problem is Torque vs. Load. When the slurry density increases, the resistance on the impeller spikes. An electric motor has a narrow “sweet spot”; if the load gets too heavy, the breaker trips or the motor burns out.
With a Hydraulic Tussu Pump, we leverage the massive hydraulic power of your excavator (CAT, Komatsu, Sany, etc.).
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Constant Torque: Even at low RPMs, the hydraulic drive maintains the “grunt” needed to push thick, heavy mud through the pipe without overheating.
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Variable Speed: You can fine-tune the pump speed from the cab to match the density of the material, preventing pipe blockages before they happen.
3. Built for the “Grind” (Material Matters)
Moving high-density sand is essentially like pumping liquid sandpaper. If your pump internals are standard cast iron, they will be gone in weeks.
In our TUSSU workshop, we don’t compromise on the “Wet End” parts. The impeller, suction plate, and agitator are all cast from Abrasion-Resistant Alloy (60-65 HRC).
Field Tip: When we shipped the recent batch of HTU200-30 units to our mining clients in Indonesia, we focused on the clearance between the impeller and the wear plate. Keeping this gap tight is the secret to maintaining high vacuum pressure and high density over long-term use.
Summary: Stop Pumping Water, Start Moving Material
If your project is falling behind schedule, stop blaming the site conditions and look at your equipment. A dredging project lives or dies by the percentage of solids in the pipe.
The Tussu Hydrualic Submersible Dredging Pump is designed for the operator who is tired of “watery” results and needs a rugged, excavator-mounted solution that actually delivers sand, gravel, and sludge.
