How does a hydrodynamic automatic flood barrier work without electricity?

The barrier panel is housed flush inside a recessed foundation chamber. Rising surface water flows into the chamber and generates buoyancy plus hydrostatic pressure, which lifts and locks the panel into the retaining position. No power supply, sensors, pumps or human operation are required, so the gate still works during a blackout — the exact moment most urban floods occur.

What retaining heights and clear widths can Junli supply?

Standard hydrodynamic units cover retaining heights from 0.5 m to 2.0 m, with single clear spans up to 6 m and multi-leaf arrays for driveway or station entrances above 20 m. Light flip-up models are available for pedestrian doorways and equipment rooms.

Are the flood gates tested with real water before delivery?

Yes. Every design is validated in our own water-testing pool for lifting time, seal leakage rate and structural deflection, and typhoon-season field records from installed projects are documented. Third-party inspection reports and water-retaining test videos can be issued with each shipment.

Do you support overseas installation and after-sales service?

We provide civil-works drawings, embedded-frame templates, remote commissioning guidance, spare seal kits and English installation and maintenance manuals. Engineer dispatch for large infrastructure projects can be arranged through our global service team.

China Automatic Flood Barrier without electric power Pricelist, Quotes

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China Automatic Flood Barrier without electric power Pricelist, Quotes

Self Closing Flood Barrier Water retaining height: 60cm, 90cm, 120cm, 150cm height Surface Installation Design: Modular without Customization Material: Aluminium, 304 Stain Steel, EPDM rubber Principle: water buoyancy principle to achieve automatic opening and closing The bearing layer has the same strength as the manhole cover Our advantages: 1. **Fully Automated Without Electrical Dependency**: Operates normally during power outages in extreme weather. 2. **Unmanned Operation**: Automatically rises to block water when the water level reaches the trigger point, providing 24/7 flood control with automatic adjustment of the gate's opening angle according to water level changes. 3. **Ground-Flat Storage**: Lays flat on the ground, occupying no space and allowing unimpeded pedestrian and vehicle traffic. 4. **Emergency Vehicle Passage**: In the early stage of water blocking, garage vehicles can drive over the water-blocking panels for evacuation. 5. **Modular Design**: Enables quick installation without major modifications. 6. **Anti-Collision Warning Lights**: Prevents accidental impacts by pedestrians and vehicles during flood control. 7. **Optional Remote Networking Supervision System**: Enables intelligent flood control management. 8. **Minimal Maintenance**: Only requires periodic cleaning of debris at the gate's base. 9. **Dual-Mode (Manual & Automatic) Operation**: Enhances flood control flexibility. 10. **Durable Materials**: Ensures a service life of up to 10 years.

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Product Description

The hydrodynamic automatic flood barrier is composed of three parts: ground frame, rotating panel and side wall sealing part, which can be quickly installed at the entrance and exit of underground buildings. The adjacent modules are flexibly spliced, and the flexible rubber plates on both sides effectively seal and connect the flood panel with the wall.

Three-Part Structure

Includes ground frame, rotating panel, and side wall sealing components.

Flexible Splicing

Adjacent modules splice seamlessly to fit various entrance widths.

Effective Rubber Seal

Flexible side rubber plates ensure a tight connection with adjacent walls.