Hydrodynamic Passive Flood Barrier
Automatic flood protection powered by the water flow itself — no external power or manual deployment.
The Hydrodynamic Passive Flood Barrier is a fully automatic flood-control gate for locations where mains power and on-site operators may not be available. As water reaches the activation threshold, the flow acts on the gate mechanism and raises the barrier into its water-blocking position. When the water recedes, the barrier gradually returns to its normal flush position under its own weight. It is suited to rivers, drainage outlets, urban pipe networks, vehicle entries and other unattended flood-prone access points.
Why this product
Key features
- Automatically raises when water flow reaches its activation threshold
- Returns gradually to its flush position as water recedes
- No external power, electronics or routine manual deployment required
- 304 stainless-steel base and panel with polymer-composite auxiliary materials
- Flexible water-stop seals help prevent leakage when the barrier is raised
- Suitable for rivers, drainage outlets, pipe networks and unattended vehicle access points
Technical detail
Specifications
| Activation | Water-flow pressure and buoyancy at the set threshold |
| Reset | Gravity return as the water level recedes |
| Power required | None for barrier operation |
| Base and panel | 304 stainless steel |
| Auxiliary materials | Polymer composite |
| Sealing system | Flexible rubber water-stop strips |
| Best suited to | Rivers, drainage outlets, pipe networks and unattended access points |
| Important consideration | Response depends on available water flow; very slow-flowing sites may respond more slowly |
Related guides
Learn where this flood barrier works best.
These guides help compare flood barriers Australia-wide by site type, deployment speed, and long-term protection needs.
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