Patent ID: 7392828

Claim:
An insertion part which can be used in a gas line or a liquid line, the insertion part comprising a housing ( 2 ), and a displaceable sealing body arranged in an interior of the housing which can seal a flow opening of a feeder channel in a closed position, the insertion part ( 100 ) is provided with an annular lip shaped part ( 3 ), having at least one upstream control lip ( 9 ) and an annular body ( 6 ) held inside the housing, and which in an area of at least one flow opening has at least one sealing lip ( 14 ), downstream from the control lip ( 9 ), as the sealing body that can be displaced by the fluid, with a free lip end region that contacts an opposing housing surface in a sealing manner in the closed position, wherein the at least one control lip ( 9 ) is aligned with the free lip end region extending in an opposite direction to a flow direction (Pf 1 ) of the fluid and limits an annular upstream opening space ( 11 ) between the control lip and the interior circumference of the housing.