Patent ID: 7959127

Claim:
A valve for regulating the flow of a fluid, the valve comprising: a housing defining a fluid inlet and a fluid outlet; a valve cage disposed within the housing and defining at least one projection wall; an axial trim at least partially disposed within the valve cage and reciprocally moveable between an open position wherein. fluid is able to flow therealong from the fluid inlet to the fluid outlet, and a closed position wherein the flow of the fluid from the fluid inlet to the fluid outlet is blocked thereby, the axial trim comprising: an elongate main body defining an axis; and at least one opposed pair of notches formed in the main body, each of the notches of the pair defining a first wall which extends at an angle in the range of from about 20° to about 40° relative to the axis, a second wall which. extends to the first wall in generally parallel relation to the axis; and a third wall which extends to the second wall in generally perpendicular relation to the axis; the axial trim being configured such that the first wall is disposed upstream from the third wall within each of the notches formed in the main body; the notches and the projection wall collectively defining a tortuous flow passage through the valve cage which fluidly connects the fluid inlet to the fluid outlet when the axial trim is in the open position.