EPDM.CR.NBR rubber material duckbill pressure safety valve

1)  pressure safety valve 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 .  duckbilled flexible safety 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.

rubber check valve  requires no external power sources and because there is not mechanism it doesn't require maintenance, therefore it can be more competitive than other valves used for the same function such as gate valves.

slip on duckbill valve , rubber check valve ,  duckbilled flexible safety valve