NewFlag is a reliable manufacturer and supplier of high performance watertight flood gates. Our products are designed for facilities that need dependable flood protection at entrances, tunnels, and below-ground access points. Our flood gates use corrosion-resistant aluminum alloy that helps maintain a tight seal under high water pressure. The structure stays stable, easy to handle, and suitable for long-term operation in flood-risk areas.
Key Features of NewFlag Flood Gates
NewFlag manufactures watertight flood gates using reinforced aluminum alloy. The material gives the frame strong support while keeping the structure light enough for quick handling. This improves onsite efficiency and reduces the need for heavy lifting tools. The alloy stays clean during long-term moisture exposure, which helps maintain stable performance after repeated floods.
Each gate follows a controlled production process. The sealing parts, locking points, and frame are checked for accuracy to ensure stable performance in real working environments. NewFlag also supports custom dimensions for facilities that need special layouts or non-standard openings.
Aluminum alloy reduces overall weight, making the flood gate easier to carry, position, and remove during emergencies. This allows quick response when rainfall increases suddenly.
Aluminum alloy does not rust, even under constant moisture. The flood gate stays stable and reliable during long-term outdoor exposure, especially in rainy or coastal areas.
Despite being lightweight, aluminum alloy delivers strong resistance to water pressure. It maintains its structural integrity through repeated floods and protects the building effectively.
Aluminum alloy flood gates need minimal care. They do not peel, corrode, or degrade easily, reducing maintenance time and long-term costs.
The material’s smooth surface enhances contact with sealing components, helping reduce leakage and improving water-blocking performance during heavy storms.
Aluminum alloy withstands rain, humidity, and temperature changes, making the flood gate suitable for both indoor and outdoor protection throughout the year.
NewFlag supplies aluminum watertight flood gates with stable structure, accurate sealing, and consistent performance in high-pressure flood environments. Each flood gate follows controlled production and strict checks for frame strength, gasket alignment, and load resistance to ensure dependable protection for entrances, tunnels, and below-ground access points.
We support engineering teams with precise measurements, custom sizing, and clear technical guidance to simplify installation and reduce project risks. Contact NewFlag for specifications and tailored water gate flood barrier solutions for your site requirements.
A flood gate is a movable barrier designed to block or redirect water. It can be part of a permanent engineering structure, such as a dam, reservoir, storm sewer system, or tidal defense wall. It can also be a smaller, removable barrier used to protect a single doorway or entrance. No matter the size or design, the primary purpose of a flood gate is to prevent water from entering a protected zone during floods, storms, or tidal events.
Flood gates perform a second major function beyond blocking water: they help regulate water levels. In dams and controlled waterways, gates open and close to maintain water flow, balance reservoir levels, and support downstream ecosystems.
Flood gates play a major role in protecting cities and infrastructure from rising water. Without these structures, storm surges could easily push into drainage networks, rivers could overflow into residential districts, and coastal tides could inundate farmland or industrial sites. As climate patterns shift, flood gates provide an adjustable, engineering-based defense against unpredictable water events.
They help communities and industries by:
1. Blocking Floodwater
Flood gates are placed at key points where water could enter, such as doorways, culverts, storm sewer outlets, and river channels. When water starts rising, the gate closes to form a tight seal and keep floodwater out. Residential systems use quick-fit frames, strong panels, and watertight seals made from steel or aluminum for fast installation.
2. Preventing Backflow in Cities
Urban drainage systems can reverse flow during high tides or river surges. Sluice gates and backflow flood gates stop water from forcing its way into streets, basements, and storm pipes by staying closed when pressure builds from the river side.
3. Managing Water Levels in Dams
In dams and reservoirs, flood gates open or close to control water levels. During storms, they release excess water to prevent overtopping. In dry periods, they hold water back to maintain storage and keep downstream flow stable.
| Category | Removable Flood Gates | Fixed Flood Gates |
|---|---|---|
| Structure | Removable panels with seals and mounting frames | Permanently built into dams, levees, channels, or drainage systems |
| Installation | Installed before a flood and removed afterward | Installed once; remains in place year-round |
| Best Use Cases | Homes, shops, basements, small entrances | Dams, tidal barriers, storm sewer systems, river control |
| Water Pressure Resistance | Suitable for moderate, short-term water pressure | Designed for high pressure, strong currents, and extreme conditions |
| Operation | Fully manual, depends on quick deployment | Manual, hydraulic, or automated control systems |
| Maintenance | Low maintenance; mainly cleaning and seal inspection | Requires periodic professional inspection and mechanical servicing |
| Cost | Lower cost, ideal for individual properties | Higher cost due to engineering, construction, and automation |
| Flexibility | Can be stored and used only when needed | Always active, providing continuous protection |
| Response Speed | Depends on human response time | Immediate or automated response based on water levels |
Many buildings and infrastructures do not have standard doorway or channel dimensions. A custom flood gate matches the precise width, height, and shape of the opening, which guarantees a watertight seal and prevents leaks during high water pressure.
Different locations face different flood forces. Some areas only see shallow surface flooding, while others experience strong currents or deep water. Custom flood gates are built to withstand the expected load, ensuring they do not bend, fail, or detach under extreme pressure.
Older buildings, uneven surfaces, and worn-out concrete often require tailored mounting frames or special materials. A custom gate adapts to these conditions without requiring major reconstruction.
Properties located in flood-prone zones—such as riverside buildings, coastal areas, or low-lying industrial facilities—need a barrier specifically engineered for frequent or severe flooding. Custom gates offer stronger protection and longer service life.
Some users need a gate that is:
Because the gate is made for a specific location, the sealing performance, frame strength, and material selection are optimized. This reduces the risk of failures during emergencies and ensures consistent performance over years of use.
In commercial buildings or public facilities, the appearance of the gate matters. Custom options allow the design to blend with the architecture instead of looking bulky or out of place.
402, NO.15, Senmao Rd., Jiangyin, Wuxi City, Jiangsu Province, China, 214400
+86 189 6162 8536
keanu916
+86 189 6162 8536
keanu@newflagtech.com