Flap Valve

Judberd is a professional flap valve manufacturers in China, our flap valves is as below

Judberd flap valve features

Lifting ring design for easy lifting of the valve cover
The detachable screen is designed to filter out debris in addition to the basic flap valve function ,also prevent snakes and rats outside the pipe from entering the pipe and causing damage to the pipeline components,
It can be easily removed if the screen is not needed.
Valve pins and clips are made of stainless steel to avoid rusting and sticking to the valve body and bonnet, and we have added large round stainless steel gasket to increase the force area of the clip, preventing damage to the clip and extending the service life of the valve.
A resilient seat is used to improve sealing performance and metal seat is also available upon request.
The flap valve body and bonnet are made of ductile iron, which is stronger and has a longer service life than other material flap valves. The surface is FBE coating to prevent rusting.

What is flap valve?

The flap valve normally be used as water conservancy facility. It is a one-way valve installed at the outlet of a riverside drainage pipe. When the river tide level is higher than the outlet, and the pressure is greater than the pressure inside the pipe, the flap automatically closes to prevent the river tide from backing up into the drainage pipe.
When the pressure inside the pipe is greater than the pressure outside of the flap then it opens and the medium inside the pipe is discharged, when the pressure from the drainage is released it will close. Thus preventing debris from the outside entering the pipe.

Operation

The flap valve opens when the pressure inside the pipe is high enough and closes when the pressure inside the pipe is released. No external intervention is required. Our flap valves have an inclination of 10 degrees between the flap and the valve seat, thus ensuring that the flap valve sealed very well.

How do I remove the flap valve filter?

The filter can be easily removed by simply using a pair of pliers and holding the pin in the middle. The same pliers are used to hold the pin in the middle and place it over the mounting hole to put the filter back on.

Maintenance

Regular maintenance should be carried out on the valve to ensure that the pin is not damaged, the valve plate opens properly and the seal is performing well

Flap valve advantage

The flap valve has the following advantages over traditional gates.
1.More energy-saving (such as opening and closing the gate without the need to manually apply external force)
2. Long service life (simple mechanical structure, easy maintenance)
3. Convenient to use (no manual operation required for opening and closing)

Flap valve application

Is flap valve a check valve?

Yes, flap valve is one of check valve or non return valve.so it is also called non return flap valve.Its function is exactly same as check valve, the only special for flap valve is that it normally is installed in the end of drainage pipe.Not in the middle line of pipe.