DSH Systems: Before & After DSH7 Truck Loading Limestone Sand

Clear Vision, Cleaner Air: DSH7 Minimises Dust by Design

This video captures a side-by-side comparison of truck loading operations before and after installing the DSH 7 Corten‑Steel Dust Suppression Hopper (DSH).

It demonstrates the system’s ability to virtually eliminate airborne dust when loading limestone sand at up to 950 tonnes per hour.

The Dusty Challenge

Loading bulk materials like limestone sand often stirs significant dust. In the "before" footage, trucks vanish in a dense cloud. Visibility suffers. Workers inhale harmful particles. Equipment and site surfaces quickly become dirty. This raises risks, maintenance, and compliance concerns.

DSH Systems designed its hopper to address that directly. The equipment installs under feed points and works on a simple yet effective principle: it prevents dust at the source rather than suppressing escaped dust.

How the Hopper Works

The DSH hopper sits directly beneath the inlet of a loading chute or conveyor. As material enters:

• Weight causes a spring‑loaded mechanism to open the discharge gap.
• Material flows outward in an annular shape.
• Ambient air escapes from the material and is displaced.
• A solid "plug" of material forms and falls almost dust-free.
• Dust remains sealed within that column, preventing release on impact.

In action, the video shows that limestone sand loads into a truck cleanly, with a high‑density, narrow stream instead of a dust cloud.

Why It Matters

• Air quality improves instantly. No ambient dust means safer working conditions, reduced clean‑up, and better compliance with health regulations.
• Maintenance needs drop significantly. The DSH has no moving parts, no electric, hydraulic, or pneumatic controls. It operates autonomously with a spring mechanism, requiring only minimal servicing.
• Product preservation improves. Dust remains trapped within the flow rather than escaping, reducing product loss and contamination.
• Installation stays simple and low‑cost. The hopper integrates into existing systems with little downtime or site modification.

Performance Highlights

• Loading rate achieved in the video: 950 tonnes per hour of limestone sand.
• DSH models accommodate throughout capacities from 50 tph up to over 2000 tph, adjustable by material type and density.
• The demonstration uses a Corten‑steel hopper, one of several material options—including stainless steel and polyethylene—to suit abrasive or corrosive products.

Applications and Industries

The DSH Dust Suppression Hopper applies across bulk-loading operations:

• Truck loading, as seen in this limestone case
• Railcar and ship loading
• Stockpile filling and warehouse loading
• Food, fertilizer, grain, mineral, and fuel operations 

Its clean operation benefits any site facing dust, airflow, or product loss challenges, no matter the bulk material.

The Engineering Behind DSH

DSH Systems launched in 2004 in New Zealand, founded by Trevor Schwass, an engineer determined to end dust problems during loading. The system has since earned industry acclaim and wide adoption.

Over ten thousand hoppers now operate across forty countries through a global distributor network.

The underlying design remains simple and robust:

• Spring-balanced flow control
• No external power or moving components
• Fast, tool-free installation
• Quick return to operation after setup

Summary: See It to Believe It

This video shows the DSH system’s impact: an ordinary, dusty truck load transforms into an almost clean, efficient transfer. Visibility stays clear. Air stays clean. Operations remain simple and safe.

If your facility loads dusty materials, this demonstration shows how DSH brings better safety, hygiene, and productivity without complex systems. Watch how it works and imagine that cleaner future for your own operations.