A rubber duckbill check valve is an important tool

A rubber duckbill check valve is an important tool for wastewater treatment applications. It prevents the entry of sediment and sea water, while providing flushing action for the discharge pipe. Under certain conditions, it can even provide higher dilution. These advantages make it a popular choice for wastewater treatment applications.


The rubber duckbill check valve is a low headloss in-line check valve that is an excellent choice for zero-backflow applications, storm water outfalls, and combined sewer overflows. CSOs occur when the volume of wet weather runoff exceeds the capacity of a sewage treatment plant. The sewage is discharged into the environment without being treated and can cause serious water pollution problems.

The design of the duckbill check valve consists of a lip and a slit. The length of the slit will determine the amount of pressure required to open and close the valve. Depending on the design, the valve may be installed in a number of ways. For example, some types have an undercut so that the valve can be anchored. The pressure that the rubber duckbill check valve must withstand depends on the material’s hardness. A high-hardness material will have better rebound resilience and elasticity than a low-hardness material.


Unlike conventional flap gates, duckbill check valves offer a more secure seal. When installed correctly, they can provide a high level of flow protection with minimal pressure drop across the valve. They are also environmentally friendly, as they are 100% rubber. These valves have an exceptional sealing capacity and a long service life.

The duckbill check valve is a one-way valve that is used in a wide range of applications, including industrial and home appliances, medical accessories, and more. They are designed to prevent backflow of liquid or gas due to their low opening pressure. They are also inexpensive and easily repairable.


A rubber duckbill check valve can be a useful tool in a number of applications. They are easy to install and have a low cost. In addition, they can be easily repaired, and they have long service lives. Their rubber construction also makes them very durable. These valves can be installed in a variety of environments, including reservoirs, wharfs, and sewage systems.

A rubber duckbill check valve operates by allowing flow to flow through the valve with published here minimal pressure drop across it. These valves are excellent in preventing reverse flow and reducing standing water in a sewer. They also pass through large objects without causing a blockage. They also offer exceptional back flow prevention, and can seal around solids up to 1 psi.


When installing a rubber duckbill check valve, there are several important factors that must be considered. Firstly, ensure that you install it correctly. Make sure that the flanges are properly fitted and tightened. Do not overtighten the nuts, as you may damage the rubber.

The type of installation must also be carefully considered. Horizontal or vertical installation is a major determinant of the type of check valve that is needed. Mechanical disc and ball valves are expensive to install and maintain and can lose their components over time. A rubber duckbill check valve is an excellent choice in many situations.


A rubber duckbill check valve is a simple and inexpensive way to control back pressures. These valves are used in a variety of applications, from sewage treatment plants to outfalls and tidal operations. They are made from barnacle-resistant rubber and are treated with a fungicide to prevent deterioration.

These valves are designed to prevent backflow by closing when the pressure from outside is higher than the pressure in the pipeline. They are capable of working in water depths as deep as three meters and are suitable for seawater, raw water, and sewage. They are also a low-cost alternative to conventional sluice valves. They are characterized by their low operating pressure, quiet operation, and easy installation.