What Is a Duckbill Valve?

A duckbill valve is a check valve that is commonly used in medical applications. It is made of rubber or synthetic elastomer and has two flaps that are shaped like a duck’s beak. It prevents backflow from contaminating a system. In medical applications, duckbill valves are used to prevent contamination caused by backflow.

Spectra duckbill valve

If your Spectra breast pump is missing a duckbill valve, you can easily replace it with a new one. Spectra replacement duckbill valves are compatible with the S2, S1, 9 Plus, Dew 350, and Spectra Plus breast pumps. Spectra recommends replacing these parts every 3-6 months for optimal performance. Spectra Baby USA is a leading breast pump company that provides pumping mothers with the latest and most innovative breast pump supplies. In addition, the company employs a team of lactation consultants who are pumping mamas themselves.

The Spectra Duckbill Valve Set is designed to increase suction and output during breast pumping. It also prevents backflow contamination and is easy to clean. ThisĀ duckbill check valve silicone pump part fits the S2, S1, S9, M1, and DEW 350 breast pumps.

Rubber duckbill check valve

The primary function of a check valve is to prevent the backflow of pumped materials into outfall discharge areas. These valves come in several different types and can be used in a wide variety of applications. The rubber duckbill check valve is one such type that is fully passive, meaning it does not require any manual or power assistance.

The rubber duckbill check valve works by acting as a gasket between two mating flanges. It is a simple device to install. The flanges should be securely fastened to avoid the valve from being overtightened.

Environmentally friendly

An Environmentally friendly duckbill valve is a great choice for many applications, from wastewater treatment plants to water systems. These green valves replace the valve check valve and eliminate blockage problems. The valves are fire-resistant and have elastomeric construction, making them safe to handle any fluid. They also have an outstanding service life and are trouble-free.

The duckbill valve is a one-way valve that uses an elastomeric body pressed within a tubular fitting. The inner walls of the tubular fitting press the elastomeric body into an oval configuration, and the tapered walls eight at the far end of the slit are the securing ridge. The valve also features a mid-section that separates the collar and ridge, creating a recess in which to lodge the tubular fitting.


A cost-effective duckbill valve can be used in a variety of applications. They are easy to install and incorporate into a variety of devices, and they do not require complex assembly processes. Additionally, they are very effective at preventing backflow. This valve is often used to prevent mud and silt from entering a body of water.

Duckbill valves are highly durable and can last up to 30 years. They are also less expensive than mechanical check valves, which generally require replacement after less than a decade of service. But while check valves are low-cost, they can have a high failure rate.