HIGH PRESSURE DUCKBILL VALVE AND INSERT

摘要

The present invention provides apparatus featuring a check valve featuring a duckbill valve configured to provide fluid and particulate; and an insert having a base portion configured to seat the insert inside the duckbill valve, and a W-shaped portion configured with an opening to pass the fluid and particulate through the duckbill valve and also configured to provide support for walls of the duckbill valve in response to back pressure caused by the fluid and particulate.