Product characteristics:

The advantages are specially marked in comparison with traditional flap valve;

1. Open and close automatically in security and reliability according to hydraulic difference without noise and in no need of operator and maintenance;

2. Positive start has little water resistance and start –up pressure and the flow can be adjusted naturally according to hydraulic pressure.

3. Reserve cut-off has good seal without leakage to prevent from flowing backwards. The back pressure is higher and the effect is barrier;

4. Anticorrosion, aging resistance, deformation resistance, strong adapt-ability and long use life;  

5. Wide size scope, nominal diameter of DN50-DN3000.

Applications cope:

1. Excellent performance ad wide application scope

2. Applicable for sewage system

3. Applicable for discharge system

4. Applicable for dyke discharge

5. Applicable for the drainage of airport and freeway

6. Applicable for sewer discharge

7. Applicable for swage lagoon dis-charge

8. Smell separation

Installation structure type:

1. Belled XF-T be installed at the exit of drainage pipe

2. Flanged XF-T be installed at the exit end with flange of drainage pipe

3. Mounting plate XF-F be installed on the building at the water exit end.

4. Build-in XF-F be installed at the exit end of rain and sewage system in cities

5. Grout or cement pipe XF-T be installed at the end of grout or cement pipe

You can see design picture.