Duckbill check valves are one-way or backflow-preventing elastomeric components that operate by pressure differential across two halves, which open or close to control the flow of fluid. They are ideal for use in sewage, wastewater, and industrial applications that require reliable backflow prevention.
Duckbills are easy to install in a variety of different locations and are compatible with many different pipe materials. They are also available in various elastomeric materials to handle a wide range of fluids and temperatures.
Rubber duckbill check valve are the perfect solution for controlling sewage backflow. They offer quiet operation, are maintenance-free, and can be installed in a variety of piping systems.
These are manufactured from high quality neoprene, EPDM, Viton, or natural rubber. They are also fire retardant, abrasion resistant, and resist rusting.
They are easy to install with a simple clamping system. They can be mounted directly between existing flanges in a piping system or onto a storm water headwall.
Installation should be performed by a certified plumber. A qualified plumber will be able to ensure that the duckbill is properly installed and in good condition. They will be able to ensure that the pipes are straight and level, and that the valve is aligned correctly to prevent backflow.
A duckbill check valve is a check valve that is made from rubber or synthetic elastomer and is designed with flaps that look like the beak of a duck. As the upstream pressure is applied, it forces the flaps to open allowing fluid to pass through the valve. The flaps return to their original shape and close when the pressure is reduced.
There are several types of check valves, each with their own unique characteristics. Some can corrode, others can freeze, some can be deformed by the sun or by ice, and some may become inoperable if exposed to chemicals or debris.
The best type of check valve for your application depends on the fluid and the environment it is going to be exposed to. Corrosive and abrasive liquids can cause swing/flap check valves to rust, and they can be damaged by UV light and ozone.
Another characteristic that affects the selection of a check valve is the size. Choosing the wrong size can lead to leaks and other problems in your system, so be sure to choose the right check valve for your application.
Some common types of check valves include flap and ball types. Both have a rubber diaphragm or disk that is pressed against a seal to close the check valve. This can be done by gravity, a spring, or by the use of backpressure.
These are designed to start functioning at specific opening and closing pressure ranges, which depend on the specifics of your application. They can be made to withstand a few millimeters (inches) of water to several hundred kPa, depending on the valve size and geometry.
In addition, they have a pressure drop across them that is designed to start functioning at a specific range of upstream and downstream pressure differences, which helps to provide reliable backflow prevention. Duckbills are also a popular choice for backpressure control from sewage treatment plants, outfalls, and tidal operations.