Fluid control means having plurality discs

Claim 1

A valve structure comprising a valve body having an inlet passageway extending in one direction and an outlet passageway extending in a second direction generally at right angles to said one direction, a valve plug mounted within said body for longitudinal back and forth axial movement to control the flow of fluid from the inlet passageway to the outlet passageway, and a stack of annular disc-like members in said valve body extending about and receiving the valve plug in its closed position with the annular members being spaced from each other to permit a flow of fluid therebetween in an open position of the valve plug, each of said annular members having an imperforate annular body portion of a generally uniform thickness and a plurality of spaced concentric ribs extending from opposite faces of the body portion with each annular body portion having aligned pairs of concentric ribs on said opposite faces, the concentric ribs on adjacent facing annular members being in opposed aligned relation to each other with the spacing between each successive pair of facing ribs progressively increasing in an outward direction, said ribs providing a resistance to flow of fluid between the annular members and resulting in successive pressure drops.