Built in flange Duckbill Valve

Size: DN50 – DN1800

Suitable for PN10, PN16 flange.

Product Feature:

There are flowing properties for this duckbill valve.

Open and close automatically according to water pressure difference safety without noise and no need of human operation and maintenance.

Small flow-in pressure and flow regulates naturally as water pressure.

Good seal for reverse non-return and no leakage to avoid flow backwards. The better effect with larger pressure.

Anti-corrosion, anti-aging and longer working service.

Wide size scope and nominal diameter of DN50 – DN1800.

Requirement for Installation:

• Generally, we advise customers using duckbill valve of flange type in applying for active jet and socket type for passive jet.
• The mouth line of the duckbill valve should be vertical to the ground level when installing.  
• Hoisting equipments are required for duckbill valve larger than DN 800 to ensure the using performance and working service.