Coanda Screen Introduction - BtoSlot
Release Time:
2024-12-10
A Coanda Screen is an innovative overflow intake system that uses a fine-mesh screen to separate water from debris, fish, and sediment. Designed with a curved structure, it leverages the Coanda Effect to ensure self-cleaning and efficient filtration. This technology is widely applied in small hydropower projects, irrigation systems, and environmental management.
What is a Coanda Screen?
A Coanda Screen is an innovative overflow intake system that uses a fine-mesh screen to separate water from debris, fish, and sediment. Designed with a curved structure, it leverages the Coanda Effect to ensure self-cleaning and efficient filtration. This technology is widely applied in small hydropower projects, irrigation systems, and environmental management.

The screen’s construction allows water to flow over a weir and through slot openings with widths ranging from 0.5 mm to 6 mm, while residual water, fish, and debris are guided downstream. Its robust design ensures reliable performance in demanding environments, while prioritizing ecological safety by preventing harm to aquatic life.
Key Features of Coanda Screens
1. Self-Cleaning Design: The curved screen design ensures minimal debris buildup, reducing maintenance requirements.
2. Precise Filtration: Slot widths between 0.5 mm and 6 mm allow for tailored filtration based on project needs.
3. Eco-Friendly: Tests (e.g., Buell 2000) have shown that fish, including salmon smolt and fry, can pass through Coanda screens unharmed, making them a sustainable choice.
4. Durable Materials: Manufactured from premium stainless steel wedge wire, ensuring long-term performance and resistance to corrosion.
Best Practices for Installation and Operation
1. Residual Water Management: Ensure water flow is evenly distributed across the screen to prevent fish stranding and maintain ecological balance.
2. Fish Safety: A downstream pool should be installed to safely collect fish and dissipate energy from water flow, reducing the risk of injury.
3. Predation Control: Consider adding netting to prevent bird predation on fish passing through the screen.
4. Monitoring and Customization: Coanda screens can be paired with additional systems, such as fish counters, to monitor and manage aquatic life effectively.
Applications
• Small Hydropower Plants: Efficiently filter water while protecting turbines and aquatic ecosystems.
• Irrigation Systems: Provide clean water for agricultural use by separating sediment and debris.
• Fish Migration Monitoring: Adapt the system to count or redirect downstream migratory fish.
Why Choose BtoSlot?
At BtoSlot, we specialize in the design and manufacture of custom wedge wire screens tailored to Coanda systems. Our screens are built to meet the highest industry standards, offering exceptional durability, precision, and eco-friendliness. Whether you are looking to optimize a hydropower project or improve irrigation efficiency, our team is here to provide expert solutions.
Contact Us Today
Partner with BtoSlot for high-performance Coanda Screens built to withstand challenging conditions while ensuring environmental sustainability.

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