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 Embedded type Automatic flood barrier for Metro Manufacturer, Suppliers

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Wholesale Embedded type Automatic flood barrier for Metro Manufacturer, Suppliers

Design: Modular without Customization Material: Aluminium, 304 Stain Steel, EPDM rubber Principle: water buoyancy principle to achieve automatic opening and closing The Model Hm4e-0006E hydrodynamic automatic flood barrier is applicable to the entrance and exit of subway or metro train stations where allow for pedestrian only. 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

Model	Water Retaining Height	Installation Mode	Bearing Capacity
Hm4e-0006E	620	Embedded mounted	(pedestrian only)metro type

Grade	Mark	Bearing Capacity (KN)	Applicable Occasions
Metro type	E	7.5	Metro entrance and exit.

Precautions for use

1) [IMPORTANT] When the door leaf blocks the flood and is in the upright state, the back supporting strut shall be used to fix the door leaf in time! At this time, the strut can share the water pressure and impact force of the flood on the door leaf, so as to ensure the water retaining safety; at the same time, it can prevent the door leaf from closing and hurting people due to the flash back of the flood. When the door leaf is opened, the warning light belt at the front of the door leaf is in a high-frequency flashing state to remind vehicles or pedestrians not to collide. After the flood recedes, the debris such as silt and leaves inside the bottom frame shall be cleaned first, and then the door leaf shall be put down.

2) Vehicles, articles or ice and snow shall not be placed on the upper part of the door leaf of the flood barrier, and the door leaf shall be prevented from freezing on the bottom frame or ground in winter, so as to avoid the above factors hindering the normal opening of the door leaf for water retaining when the flood comes.

3) During inspection and maintenance, after the door leaf is manually pulled up to the upright state, the back brace shall be used to fix the door leaf in time to prevent it from suddenly closing and hurting people. When close the door leaf, the handle of the door leaf shall be manually pulled, then the back brace shall be removed, and the door leaf shall be slowly lowered. Other people shall be far away from the top of the bottom frame to prevent people from being hurt!