A device for controlling liquid flow in a conduit which is of a hat-like configuration defined by a cylindrical base part having a flange part at one end and a closure part at another end joined thereto by an integral spring which bends to permit through-flow of liquid through a peripheral gap between the body part and the closure part. The method further includes utilizing a focused removal technique, such as a water jet or laser drill, to remove a portion of a virtual pattern cast shell from the cast component. The drain terminals extend to the same metal interconnection layer as the signal line, but are not connected to the signal line.