Flanged duckbill valve can effectively prevent the invasion of seawater and sediment. There is a certain density difference between seawater and the discharged sewage. When the sewage discharge is small, the traditional discharge outlet diffuser will cause seawater intrusion diffuser and bring the seabed environment sediment into the diffuser due to the decrease of the nozzle jet velocity. And the flanged duck-bill valve outlet changes with the change of discharge, discharge is zero when closed, and in the case of lower emissions can maintain a higher jet velocity, thus preventing the invasion of seawater and environmental sediment.

[product alias] : flange duck valve

[Product specification]: dn100-dn2000

[product certification] : ISO 9001-2015

[scope of application] : chemical, iron and steel, construction, chemical, steel, tap water

[product material] : flange is carbon steel, stainless steel

Principle:

Duck bill valve by elastic neoprene and artificial fiber by special processing, shape similar to duck bill, it is called duck bill valve. Under the condition of no internal pressure, duck bill outlet is closed under the action of elasticity. As the internal pressure gradually increased, the outlet of the duck's beak gradually increased, maintaining the liquid to be discharged at a high flow rate.

Function:

Rubber duck bill valve can prevent flood and sewage backflow into the street sewer and basement, avoid major losses, prevent water level rise, flood backflow into sewage treatment plants, drainage pump station; Prevent foul water or odourous fluid odour from spreading, and allow drainage at all times; In rainy seasons, it prevents city rivers from flooding the streets from sewers; The quality is better than the flap door, overcome the flap door such as lax closure and other defects.

Features:

1, 100% rubber structure, can meet all kinds of anti-corrosion requirements (according to the actual demand, can choose different rubber materials).

2. No clogging and good sealing.

3. Long service life, trouble-free and maintenance-free.

4, no moving parts and mechanical parts, no electrical signals and manual operation, no noise.

5, small opening pressure, more than 0.01 meters of the head can be opened.

6. Under normal conditions, head loss can be reduced to a minimum.

7. Can change various installation forms to meet customer needs.

8. Convenient installation, low cost and low operation cost.