1.Introduction:

Rubber Duckbill Check Valve is our special product,and it  is used for draining sewage.In such  foreign countries as Spain or America,it is usually named as duckmouth-shaped valve.

The valves can be matched with straight pipeline,flange pipe. At the same time,they may be widely used on the coast,seasands,reservoirs,and so on in order to dispose the sewage or to dredge the floods .Indeed ,it is environmentally-friendly valve.
 
2.  duckbill check valve detail caracteristics:
 
This valve is a special product ,and it is used for draining sewage .In many  foreign countries,such as Spain , America,it is usually named as duckmouth-shaped valve .We are  doing our best to make this valve more practical and more perfect . Rubber material duckbill check valve can be matched with steel  pipe ,cement pipe At the same time ,they may be widely used on the coast,seasands,reservoirs,and so on.In order to dispose the sewage or to dredge the floods.
 
Some elastomers can hand corrosive or abrasive fluids such as raw sewage, sludge or slurries. The operating temperature of the valve is limited by the elastomer temperature capacity. 
 
The rubber is all rubber reinforced. It consists in an elastomer sleeve flattened in one end. The Duckbill valve can only be opened when the forward flow lifts the sealing flattened side of the sleeve that, otherwise its natural position is to be closed.

3.Advantages of Easy Installation Duckbill Rubber Check Valve:

1)Open  and close automatically,no noise,no need of operator and maintenance.
2)Positive start has little water resistance and start-up pressure ,the flow will be adjusted naturally according to hydraulic pressure
3)reserve cut-off has good seal without leakage to privent from flowing backwards.the back pressure is higher,the effect is better.
4)Anticorrosion,agingresistance,strong adaptability and long use life.
5)Wide size scope.Nominal diameter of DN20-2400