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.

Wholesale Modular hydrodynamic automatic flood gate Supplier, Factories

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Wholesale Modular hydrodynamic automatic flood gate Supplier, Factories

Self Closing Flood Barrier Water retaining height: 60cm, 90cm, 120cm, 150cm height 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 Modular hydrodynamic automatic flood gates are now more and more recognized in China and abroad, Civil defense and State grid have begun to purchase in bulk. There are over 1000 cases in China with the success rate of water blocking is 100%. Features& 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. 40tons of saloon car crashing test Qualified 250KN of loading test

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Product Description

Frequently Asked Questions (FAQ)

Q1 What are the main applications of Junli Flood Barriers?

Junli Flood Barriers are designed for multiple applications including underground garage entrances, commercial building doorways, subway stations, factories, and residential flood defense.

Q2 How effective are these barriers at stopping water leakage?

Equipped with high-grade EPDM rubber sealing strips, the system provides excellent watertight integrity, minimizing water seepage even under heavy pressure and prolonged exposure.

Q3 Can Junli flood barriers be customized to fit specific dimensions?

Yes, the barriers feature a modular aluminum design that can be customized in length and height to fit standard or wide spans according to client site specifications.

Q4 How fast can the flood barrier be deployed during an emergency?

The modular design allows for rapid assembly. A standard doorway barrier can be assembled by one or two people in just a few minutes without special tools.

Q5 What materials are used to ensure long-term durability?

Constructed from high-strength aluminum alloy, the barrier system offers superior corrosion resistance, high impact resistance, and long-term protection against harsh weather.

Q6 What maintenance is required for the flood barrier system?

Minimal maintenance is needed. Simply clean the panels and rubber seals after use, inspect the seals periodically for wear, and store the components in a dry place.