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Company news about What is a duckbill check valve?

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What is a duckbill check valve?

2025-05-09

Duckbill valve, also called rubber drain check valve, back pressure flexible check valve, is a valve used to prevent backflow of liquids and is called duckbill valve because of its duckbill-like shape;
It is a simple but effective device designed to allow unidirectional flow of fluid and automatically prevent backflow.

 

Design and function:

Resilient construction: Duckbill check valves are usually made of a flexible elastomeric material such as rubber, neoprene or silicone. This one-piece construction is key to its operation.

Duckbill Shape: The outlet end of the valve is in the shape of a flattened duckbill with slits or openings along its length.

Forward Flow: When a fluid or gas flows in the desired direction (upstream pressure), pressure is exerted on the inside of the ‘duckbill’. This pressure causes the flexible lip of the beak to open, allowing fluid to pass through. The higher the pressure, the wider the opening.

Anti-backflow: If fluid stops or tries to flow backwards (back pressure), the pressure on the outside of the duckbill valve forces the flexible lips to flatten and seal tightly. This produces an effective shutoff, which prevents any backflow.

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Company news about-What is a duckbill check valve?

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What is a duckbill check valve?

2025-05-09

Duckbill valve, also called rubber drain check valve, back pressure flexible check valve, is a valve used to prevent backflow of liquids and is called duckbill valve because of its duckbill-like shape;
It is a simple but effective device designed to allow unidirectional flow of fluid and automatically prevent backflow.

 

Design and function:

Resilient construction: Duckbill check valves are usually made of a flexible elastomeric material such as rubber, neoprene or silicone. This one-piece construction is key to its operation.

Duckbill Shape: The outlet end of the valve is in the shape of a flattened duckbill with slits or openings along its length.

Forward Flow: When a fluid or gas flows in the desired direction (upstream pressure), pressure is exerted on the inside of the ‘duckbill’. This pressure causes the flexible lip of the beak to open, allowing fluid to pass through. The higher the pressure, the wider the opening.

Anti-backflow: If fluid stops or tries to flow backwards (back pressure), the pressure on the outside of the duckbill valve forces the flexible lips to flatten and seal tightly. This produces an effective shutoff, which prevents any backflow.

latest company news about What is a duckbill check valve? 0

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