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 Heavy duty automatic flood gate Hm4d-0006C Factory, Pricelist

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China Heavy duty automatic flood gate Hm4d-0006C Factory, Pricelist

Scope of automatic flood barrier application The Model Hm4d-0006C hydrodynamic automatic flood barrier is applicable to the entrance and exit of underground buildings like underground parking lot, car parking lot, residential quarter, back street lane and other areas where only allow non-fast driving zone for small and medium-sized motor vehicles (≤ 20km / h). and low-lying buildings or areas on the ground, so as to prevent flood. After the water defensing door is closed down onto the ground, it can carry medium and small motor vehicles for non fast traffic. 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	Longitudinal Width	Bearing Capacity
Hm4d-0006C	620	Surface mounted	1020	Heavy duty (small and medium sized motor vehicles, pedestrian)

Grade	Mark	Bearing Capacity (KN)	Applicable Occasions
Heavy duty	C	125	Underground parking lot, car parking lot, residential quarter, back street lane and other areas where only allow non-fast driving zone for small and medium-sized motor vehicles (≤ 20km / h).

Product Installation

The model 600 can be installed on the surface or embedded. Models 900 and 1200 can only be installed in embedded system. The installation of flood barrier must be completed by a specially trained professional installation team, and shall be in accordance with schedule I (full automatic hydraulic power Flood gate - installation acceptance form) can be used only after passing the acceptance.

Note:

If the installation surface is asphalt ground, because the asphalt ground is relatively soft, the bottom frame is easy to collapse after long-term rolling by vehicles; moreover, the expansion bolts on the asphalt ground are not firm and easy to loosen; therefore, the asphalt ground needs to be rebuilt with concrete installation platform as required.

Self closing flood barrier door

Pallet packing

Frequently Asked Questions (FAQ)

Q1 What installation options are available for Model 600?

Model 600 offers flexible installation options and can be installed either surface-mounted or embedded.

Q2 Can Models 900 and 1200 be installed using a surface mount?

No, Models 900 and 1200 can only be installed using an embedded system installation method.

Q3 Who is qualified to install the flood barrier system?

The installation must be performed by a specially trained professional installation team and verified according to Schedule I (Full Automatic Hydraulic Power Flood Gate - Installation Acceptance Form) before operation.

Q4 Why is direct installation on asphalt ground not recommended?

Asphalt ground is soft, making the bottom frame prone to collapse under vehicle rolling and causing expansion bolts to loosen over time.

Q5 How should asphalt surfaces be prepared for flood barrier installation?

Asphalt ground must be rebuilt with a solid concrete installation platform as required prior to setting up the flood barrier.

Q6 What is the load-bearing capacity and application for Heavy Duty (Grade C) barriers?

Grade C barriers have a bearing capacity of 125 KN, designed for non-fast driving zones (≤ 20km/h) such as underground parking lots, residential quarters, and back street lanes for small and medium-sized motor vehicles.