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 Flood control defence Manufacturer, Supplier

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Wholesale Flood control defence Manufacturer, Supplier

Hydrodynamic automatic Flood Barrier Water retaining height: 60cm, 90cm, 120cm, 150cm height Embedded Installation Design: Modular without Customization 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

Our flood gate manufacture can be independently guaranteed. We have our own patents and R&D team. Product quality and principle are very safe and reliable. The innovative application of hydrodynamic pure physical principle is different from other automatic flood gates. The cases of the 3 major domestic sectors is quite mature (Garage, Metro, Transformer substation), and it has only begun to be promoted internationally. We hope that our innovative products will bring a new and convenient way of flood control to the world.

Independent Patents & In-House R&D Team

Innovative Hydrodynamic Pure Physical Principle

Mature Applications: Garage, Metro & Transformer Substation

Frequently Asked Questions

How does your automatic flood gate operate?

Our flood gates utilize an innovative application of hydrodynamic pure physical principles, making them fundamentally different, highly reliable, and safe compared to traditional automatic flood barriers.

Do you hold proprietary patents for your flood gates?

Yes, our flood gate manufacturing is independently guaranteed. We have our own dedicated R&D team and exclusive patents ensuring high product quality.

What are the key application sectors for these flood barriers?

Our technology is maturely proven across three major sectors: underground garages, metro systems, and electrical transformer substations.

Are these flood gates available for international markets?

Yes, while our products are widely established domestically, we have actively begun international promotion to offer innovative flood control solutions worldwide.

Is the quality and operating safety guaranteed?

Absolutely. Both the product quality and underlying physical principles are independently guaranteed, safe, and highly reliable for critical infrastructure protection.