What Is a Duckbill Valve?

Duckbill valve is commonly known as: rubber blowdown check valve, also known as: back pressure flexible check valve, duckbill valve check valve, rubber check valve, rubber check valve, rubber slow-closing check valve.

Duckbill valve

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Duckbill valve commonly known as: rubber blowdown check valve, also known as: back pressure flexible check valve, duckbill valve check valve, rubber check valve, rubber check valve, rubber

Duckbill valve is divided into socket type, inlay type, built-in type, flange type, mounting plate type, mortar or cement pipe type according to the installation method.

Rubber duckbill valve can prevent flood and sewage backflow into street sewers and basements, avoid major losses, and prevent flood backflow into sewage treatment plants and drainage pumping stations when the water level rises; stop the diffusion of sewage or odorous fluids, and drain at any time ; In rainy seasons, it can prevent urban river floods from being poured back into the streets; the quality is better than shooting doors, which overcomes some shortcomings such as inadequate closing of shooting doors.

1. 100% full rubber structure, can meet various anti-corrosion requirements (different rubber materials can be selected according to actual needs).

2. Not blocked and sealed well.

3, long service life, no failure, maintenance-free.

4, no moving parts and mechanical parts, no electrical signals and manual operation, no noise.

5. The opening pressure is small, and the water head larger than 0.01 meters can be opened.

6. Under normal conditions, the head loss can be reduced to a minimum.

7, can change various installation forms to meet customer needs.

8. Easy installation, low cost and small running cost.

Flange type rubber blowdown check valve products are mainly used in waterproof systems, drainage systems, pump outlets, lifting pump stations and submerged

Duckbill valve advantages

The duckbill valve has low cost. If the service life of the appropriate rubber material exceeds that of the metal check valve, the installation is convenient, the installation methods are flexible and diverse, and it can be repaired.

(1) Maintain a high jet velocity.

(2) Preventing the intrusion of seawater and sediment is one of the main properties of the duckbill valve.

(3) Facilitates flushing of the discharge pipe.

(4) Under certain conditions, higher dilution can be obtained.

(5) Does not corrode.