Patent ID: 7624963

Claim:
A valve comprising: a housing having a fluid inlet passage and a fluid outlet passage; an orifice disposed between the fluid inlet passage and the fluid outlet passage; a valve plug adapted to move with respect to the orifice to vary the flow of fluid between the fluid inlet passage and the fluid outlet passage; a valve stem connected to the valve plug, the valve stem having a projection disposed along a length of the valve stem that is disposed outside of the housing; a valve flow adjustment device having a plurality of grooves having different depths, the valve flow adjustment device being coupled to the valve stem and engageable with the projection, wherein the valve flow adjustment device provides a plurality of preselected positions that limit the valve stem travel and correspond to a plurality of different maximum flow capacities of the valve; and a resilient member to bias the valve flow adjustment device against the projection to selectively maintain the valve flow adjustment device in one of the preselected positions.