EEV Duckbill Check Valve introduction,

EEV duckbill check valve is a new water treatment and waste water treatment valve with full rubber structure. The bill section appearance and functions or positive flow-in and reserve cut off. According to thrust analysis and calculation as well as different operation conditions, it is manufactured with different design processing. Without any operation, the water flow in form entrance and the valve will be open with little pressure. When the pressure is getting higher, the duckbill valve will be slowly opened. Oppositely, when the flow rate reduced, the duckbill valve will be auto-closed.  The back pressure will keep the duckbill valve runs a well back flow performance. EEV duckbill check valve is widely used in various drainage exit, sea dam, waste water treatment system to provide back flow service.

EEV Duckbill Check Valve performance:

1.       Open and close automatically in security and reliability according to pipe difference without noise. Zero Maintenance and Operating, use   age design 20-25years.

2.       Need very little pressure to open, open rate is controlled by the flow rate automatically.

3.       Good seal performance in back pressure. The higher back pressure, the better seal performance.

4.       Anticorrosion, Anti-aging,.

5.       Size range from DN50 to DN3200.