SKU
Oyster Self-Rising Mechanical Flood Gate
Oyster Self-Rising Mechanical Flood Gate
Custom System — Quote Required
This system is configured for your project. Pricing is based on the required dimensions, protection height, site conditions, and installation needs.
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Overview & Best Uses
Overview & Best Uses
The Oyster™ Self-Rising Mechanical Flood Gate is a passive, water-activated barrier designed to protect downward-sloping entrances against approaching floodwater. It is particularly well suited for parking garage ramps, driveway ramps, loading docks, transit entrances, tunnels, and other below-grade access points where rapid flooding could occur without enough time for manual deployment.
During normal conditions, the Oyster panels lie flat so vehicles and pedestrians can pass over the protected entrance. As floodwater approaches, water enters internal cavities within the barrier modules. The resulting buoyancy automatically raises the panels into a near-vertical position, creating a rigid flood wall without electricity, motors, external power, or human intervention.
When floodwater recedes, water drains from the internal cavities and the system can be returned to its flat standby position following the prescribed reset procedure.
Oyster is built from connected modular panels and configured to match the width and required protection height of the project. Standard modules are combined with narrower filler modules and flexible wall seals to achieve a close fit across the protected opening.
Available in approximately 24-inch, 36-inch, and 48-inch protection heights, Oyster can be installed as either a recessed in-ground system or a surface-mounted retrofit. Its heavy-duty, anti-skid construction is designed for vehicle and pedestrian traffic while the barrier is in its closed position.
Key Features:
- Automatically rises in response to approaching floodwater
- Requires no electricity, motor, battery, pump, or manual deployment
- Designed for downward-sloping and below-grade entrances
- Lies flat during normal use for vehicle and pedestrian access
- Available in approximately 24-inch, 36-inch, and 48-inch protection heights
- Modular construction accommodates a wide range of opening widths
- Standard and filler modules provide project-specific sizing
- Available in surface-mounted and embedded configurations
- Flexible side-wall and inter-panel seals help control leakage
- Anti-skid driving surface
- Optional deployment alarm and monitoring components
- Durable, low-maintenance construction
Sizes & Specifications
Sizes & Specifications
- Product type: Passive self-rising mechanical flood gate
- Primary applications: Downward-sloping and below-grade entrances
- Operating principle: Hydrodynamic buoyancy activated by approaching floodwater
- External power required: No
- Manual deployment required: No
- Standard protection heights: Approximately 24, 36, and 48 inches
- Standard module width: Approximately 23.6 inches
- Effective connected module width: Approximately 23.75 inches
- Filler module widths: Approximately 6.3, 11.4, 13.2, and 18.5 inches
- Closed panel thickness: Approximately 2 inches for 24-inch panels and 4 inches for 36-inch and 48-inch panels
- Installation options: Surface-mounted or embedded/in-ground
- Top surface: Anti-skid tread suitable for vehicle and pedestrian crossing within design limits
- Main structural materials: Aluminum and aluminum castings
- Internal components: 316L stainless steel
- Protective underside: 304 stainless steel
- Side slopes: Nodular cast iron or stainless steel, depending on configuration
- Seal materials: EPDM or silicone rubber
- Side-wall sealing: Flexible project-sized wall seals
- Width: Configured using standard modules, filler modules, and flexible side seals
- Optional equipment: Battery-powered deployment alarm or monitoring panel
- Final configuration: Based on opening width, protection height, ramp slope, drainage, traffic loads, slab construction, wall conditions, and installation method
- Ordering method: Custom project quote
Setup & Installation
Setup & Installation
Oyster is a permanently installed, site-specific flood protection system. It does not require manual setup before each flood event, but professional planning and installation are essential.
Two installation configurations are available:
- Surface-mounted: The system is anchored on top of an existing concrete or suitable structural surface. Ramped transition pieces allow vehicles and pedestrians to cross the closed barrier.
- Embedded or in-ground: The system is installed within a recessed concrete channel so the panels sit nearly flush with the surrounding surface during normal conditions.
The installation must account for the clear opening width, ramp slope, required protection height, existing drainage, slab construction, wall conditions, vehicle traffic, and the spacing required for flexible side seals.
For embedded installations, the concrete channel includes an internal drainage area connected to a suitable drain or sump system. Ordinary runoff can drain away without activating the barrier. When incoming water exceeds the available drainage capacity, water accumulates inside the Oyster modules and causes the panels to rise automatically.
Smooth, structurally sound walls are generally required on both sides of the opening so the flexible side seals can be anchored securely. Curbs, irregular walls, unsuitable pavement, or insufficient concrete may require site preparation or structural modifications.
After installation:
- Keep the panel surfaces, water inlets, drainage channels, and surrounding area free of debris.
- Inspect the seals, connections, anchors, and side-wall components regularly.
- Conduct periodic wet testing according to the operating and maintenance instructions.
- After deployment, allow the internal water to drain and follow the reset procedure to return the panels to their flat position.
- Replace damaged seals or components before the next flood season.
Final installation requirements should be determined from project measurements, photos, drawings, site conditions, and applicable engineering or code requirements.
FAQ
FAQ
How does the Oyster flood gate activate?
Approaching floodwater enters internal cavities within the modules. The increasing water level creates buoyancy that raises the panels into a near-vertical flood-protection position.
Does Oyster require electricity or battery power?
No. The barrier itself operates mechanically through hydrodynamic buoyancy. Optional battery-powered alarms or monitoring components may be added, but they are not required for deployment.
Does someone need to deploy the barrier before a storm?
No. Oyster is designed to rise automatically when incoming water exceeds the system’s controlled drainage capacity.
What protection heights are available?
Standard configurations provide approximately 24, 36, or 48 inches of water-retaining height.
How is the system sized for an opening?
Standard modules are combined with narrower filler modules to approach the required opening width. Flexible side-wall seals bridge the remaining space and connect the barrier run to the adjacent walls.
Can Oyster protect any width?
Its modular construction can accommodate many opening widths. The final configuration is determined from the exact clear width, protection height, side-wall spacing, and project engineering requirements.
Can vehicles drive over the system?
The panels lie flat during normal conditions and have an anti-skid, load-bearing surface designed for applicable vehicle and pedestrian traffic. The final system must be configured for the expected traffic and loads.
Can it be installed on an existing ramp?
Yes. A surface-mounted version is available for certain retrofit projects. An embedded version can be recessed into new or reconstructed concrete for a lower-profile installation.
Will ordinary rain cause the barrier to deploy?
The system incorporates drainage and outlet controls intended to allow smaller amounts of water to drain away. The barrier rises when incoming water exceeds the available drainage capacity and accumulates in the modules.
What site conditions are required?
Oyster generally requires a structurally suitable ramp or slab, appropriate drainage, and durable side walls for anchoring the flexible seals. Existing curbs, irregular walls, poor concrete, or inadequate drainage may require modification.
What maintenance is required?
Keep water inlets, drainage areas, and panel surfaces free of debris. Inspect seals, hardware, anchors, and side-wall components regularly and perform periodic wet testing in accordance with the operating and maintenance instructions.
What happens after the water recedes?
Water drains from the internal cavities. Operators then follow the prescribed procedure to lower and reset the panels and inspect the system for future use.
What information is needed for a quote?
Provide the opening width, desired protection height, ramp slope, installation surface, project location, traffic type, drainage information, installation preference, and target date. Photos, plans, and more precise measurements may be requested after the initial review.
Automatic Protection for Vulnerable Ramps and Entrances
Every Oyster™ system is configured around the protected opening and its surrounding conditions. Opening width, protection height, ramp slope, drainage, traffic requirements, installation method, wall construction, and concrete conditions all influence the final system design and price.
Oyster is generally best suited for locations where floodwater approaches a downward-sloping entrance and where a permanently installed, automatically deploying barrier is preferred. It may not be the best solution for every doorway, level surface, or perimeter application.
To request a project review, provide the approximate opening width, desired protection height, project location, installation surface, ramp configuration, expected vehicle traffic, and target completion date. Photos, plans, drainage information, and precise measurements may be requested after the initial submission.
More Prepared can help determine whether Oyster is appropriate for the site or whether another flood barrier system would provide a better fit.