Duckbill Check Valve

The duckbill valve is a flexible rubber check valve without moving components, mainly used in sewage drainage systems, rainwater drainage systems, underground parking lot drainage systems, etc. Its functions include odor blocking and preventing sewage backflow, which can prevent floods and sewage backflow into basements or municipal pipes.
The working principle of the duckbill check valve is that when the liquid passes through the valve, the valve opens, and as the flow or pressure increases, the opening amplitude of the duckbill check valve will also increase. When the water flow stops, the backwater pressure or atmospheric pressure will press the duckbill valve tightly to prevent the backflow of liquid or odor. The pressure required to open the duckbill valve is relatively small, and it can usually be opened when the forward and reverse water level difference is 250Pa.

Product Specification

Rubber Duckbill Check Valve

• Municipal Engineering‌

Used for flood control and drainage in urban drainage systems, preventing floods or sewage from flowing back into streets, sewage treatment plants and basements, and reducing losses caused by waterlogging;
Replaces traditional flap gates and gates to solve the problem of blockage by mud, stones or marine organisms, and adapts to the drainage needs of coasts, docks, reservoirs and other scenes.

• ‌Environmental Protection and Sewage Treatment‌

Installation at key nodes of sewage treatment plants to prevent the backflow of treated sewage to pollute the environment and ensure one-way flow of the discharge system;
Supports the discharge of complex media containing suspended solids, fibers, etc., to avoid valve blockage caused by residual impurities.

• ‌Industrial Field‌

Transport of highly corrosive media in petrochemical and papermaking industries, acid- and alkali-resistant rubber materials (such as fluororubber) ensure long-term stable operation;
Control the one-way flow of high-temperature or corrosive fluids in industrial pipeline systems (such as mining and metallurgy) to reduce the risk of equipment damage.

• ‌Agriculture and Firefighting Systems‌

Agricultural irrigation systems prevent irrigation water from flowing back and polluting water sources;
Installation of the water outlet of fire pumps to avoid water backflow and damage to equipment when the pumps are shut down.

1. Can I order valve samples?
A: Of course. We welcome you to order samples for testing and quality inspection.
2. Can you provide OEM or ODM service?
A: Yes, we have a professional R&D team. Products can be produced according to your requirements.
3. What are your delivery terms?
A: We accept EXW, FOB, CIF, DAP, etc. You can choose the one that is most convenient for you.
4. What is the packaging and how do you ship the goods?
A: Usually seaworthy plywood boxes. We usually ship by sea. Train and air are also optional.
5. How to deal with after-sales?
A: Warranty period: 12 months from the date of shipment; we will be responsible for all quality issues. Longer warranty period can be provided if detailed request and discussion are provided.

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