The duckbill check valve uses a rubber diaphragm

The rubber duckbill check valve is an inline check valve. It is available for sale all over Australia. When it closes, the flange on the valve acts as a gasket. It is important to ensure that the valve flange is not overtightened. It is important to ensure that the flange fits around the mating flanges in the correct pattern.

Flexible sleeve design

The flexible sleeve design of the Vatac Series Duckbill Check Valves offers superior flow control with minimal pressure drop across the valve. This design also provides superior backflow prevention. Vatac Check Valves are made with top-quality fabric-reinforced elastomers and are designed to withstand continuous operation in abrasive slurries and sludge.

The rubber duckbill check valve is a cost-effective, reliable, and flexible flow-through device. It does not require any power source or maintenance and has a long service life of 35 to 50 years. It prevents backflow of wastewater, isolating wastewater, and preventing standing water. Rubber Duckbill Check Valves are also commonly used to control odors and gases from wastewater.


The duckbill check valve uses a rubber diaphragm to control the flow of fluids. When positive pressure is applied to the valve, it will close and prevent backflow. Its low weight and small size make it ideal for applications that require lightweight and compact check valves. The rubber diaphragm also provides durability because it cannot rust, seize, or bind.

Duckbill check valves are often installed on a vertical pipe and should be lubricated prior to installation. When installed correctly, the outlet of the valve should be upwards and not downwards. When installed, the valve should remain in this position and should not rotate while mating pipe flanges. If the valve is tightened before it is completely attached, it could fail prematurely.

Requires no maintenance

The Requires no maintenance strategy is characterized by a lack of structure and planning. In contrast to the proactive maintenance approach, this one is not triggered by a planned event, such as a breakdown. Instead, the strategy is triggered by an asset requirement, time, or an event. For example, a news report of a fire in a building using an asset similar to yours might prompt you to schedule a maintenance inspection.

Does not slam when closed

Duckbill check valves are used to prevent backflow and ensure that mud and silt are properly discharged. These valves are also used in sewage systems and are popular in marine and coastal applications. This valve replaces flappers which can be clogged with mud, silt, rocks, vegetation, or marine life.

Non-slam check valves are different from swing valves because they do not slam when closed. Instead of using gravity to close them, they use internal springs to resist fluid flow pressure. This compression forces the disc closer to the seating surface of the valve, preventing it from slamming when closed.


Rubber Duckbill Check Valves are ideal for preventing backflow, and can handle large obstructions without leakage. They also feature an outer layer made of elastomers that repel marine organisms. These valves are lightweight, resulting in low installation costs. They can be interchangeable with flap type check valves and are very quiet when in operation. However, one disadvantage is that these valves are not resistant to high temperatures. Also, exposed outdoor sunlight can shorten their service life.

Duckbill check valves come in several different styles, including slip on, flanged, and inline. The slip-on type is installed over a plain-ended pipe and secured with a stainless steel clamp, while the flanged version is installed onto a flanged pipe spool. Both types work with pressures up to 15 meters.