The Advantages of Using a Rubber Duckbill Check Valve

A rubber duckbill check valve is designed for maximum flow and minimum pressure loss. This type of valve is ideal for reducing the amount of standing water in sewer pipes and can pass large objects without blocking. It also provides exceptional back flow prevention. At just one psi of back pressure, the valve seals around trapped solids, preventing backflow. The rubber sleeve is made from high quality materials and is specially treated to repel marine organisms.

Curved bill duckbill check valve

A Curved Bill Duckbill Check Valve has an octagonal body with a flanged end and a single curved bill. It is used to regulate the pressure in a pipeline by preventing backflow. They can operate in three to eight meters of water and are suitable for both sewage and raw water. They are constructed from natural rubber materials and have flange ends that meet various standards. They are ideal for use in corrugated, PVC and cement pipes.

Curved Bill Check Valves are available in a range of sizes and materials. Some valves are internal, while others are external. Both have sharp seal points and are available in sizes from 1/8″ to 3/16″. There Click Here  are also silicone-coated, kynar, and polypropylene check valves available.

Flexible rubber diaphragm

A duckbill check valve is a type of valve that passes fluids with high viscosity, and particulates up to 4 mm in diameter. The valve is used in a variety of applications, from juice machines to smoothie machines. It can handle both acidic and non-acidic fluids.

Duckbill check valves are used in wastewater treatment systems, mine tailing systems, outfall lines, and wet walls. They have multi-layer sleeve constructions and are abrasion and corrosion resistant. The valve can also be customized to suit the application.

Low head loss

The Cla-Val Series RF-DBI-LH low head loss with rubber duckbill check valve is an in-line check valve that offers low head loss and passive flow. The low head loss allows for quick drainage of water and reduces the amount of standing water in sewer pipes. This valve is also made of premium materials and is resistant to marine organisms.

The Duckbill Check Valve works by compressing and opening as the pressure builds up in the upstream pipe. When the pressure increases, the duckbill opens further to allow the flow to proceed. The solids are allowed to pass through without being obstructed, but the valve returns to its flattened shape when the back pressure is removed. Unlike flapgates, the duckbill check valve is more dependable even when it experiences wear. It still offers an effective seal around trapped solids even when the valve is damaged. Moreover, it is resistant to corrosion, rust, and UV.


The durability of rubber duckbill check valves is often an important factor when choosing the correct valve for a given application. They can be used for a variety of applications including vacuum pumps, compressed air and gas systems, and water/wastewater treatment. The internal components of these valves can be made from different elastomers and can be customized for the application.

Unlike metal flap and swing check valves, rubber duckbill check valves do not rust, seize, or bind. This greatly increases their reliability and lifespan. They are also resistant to mechanical wear and tear, which negatively affects other check valve materials.


If you’re installing a rubber duckbill check valve in a piping system, you’ll want to make sure you install it in the right position. This means that the valve must be positioned vertically, with the outlet pointing upwards and outwards. To do this, you need to make sure that the valve is tightened around the pipe flanges, but not too tight.

This valve is made of rubber, which is a resilient material. Its long service life means that it will last longer than a metal check valve. It’s also easy to install. The duckbill valve is made with a slit and a lip that allows it to open and close at certain pressures. The length and width of the slit determines how much pressure it can crack before it closes. Different styles will have undercuts or other features to facilitate installation. The pressure at which the duckbill valve will crack will depend on the hardness of the material used. High-hardness materials will have better rebound resilience than low-hardness materials. Silicone rubber, on the other hand, will be easier to open and close.