Role of duckbill valve.

1、Applicable to sewage system, duckbill valve can prevent flooding and sewage backflow into sewers and basements to avoid major losses.
2、Applicable to the discharge system, can prevent the water level rises when the flood backed up into the city surface, sewage treatment plant drainage pumping station.
3、Applicable to dam discharge, rocky beach discharge, the problem that plagues the flapper door is: the blockage of stone garbage makes the flapper door can't be closed or can't be opened, using YJ type duckbill valve in these areas will thoroughly solve these problems.
4、Applicable to airport and highway drainage, YJ type duckbill valve is used for airport and highway large area drainage, effectively prevent backflow.
5、Applicable to cesspool discharge, it can prevent sewage from flowing into another water section from one water section of the pre-buried pool. In untreated sewage, the normal operation of the valve will not be affected by, for example, plastic, tree branches or silk fabrics.
6、Odor blocking, the installation of duckbill valve in the pipeline can stop the spread of odor from sewage or odorous fluids, and can be drained at any time.
7、Applicable to sewer discharge, in the rainy season, to prevent filling from city sewers to city streets.
8、Aeration system, duckbill valve is ideal for municipal and factory aeration system.
9、Applicable to pumping station system, used in large drainage pumping station to prevent backflow after pump shutdown. The full rubber structure of duckbill valve can prevent the corrosion of seawater and the head loss is small. Working principle.
The orifice of the duckbill valve is closed in its natural state and can be flushed open if there is a small amount of head inside. But the external water wants to back up into the pipe inside that is very difficult, because from the duckbill valve external valve body force analysis can be seen, the greater the external water pressure, the more tightly closed the valve mouth, the better the seal.