Soft seat for metering valve

摘要

A metering valve for selectively regulating fluid flow between inlet and outlet passages. The metering valve includes threadedly interconnected bonnet and valve stem members received in a valve chamber with the stem being selectively movable axially relative to a valve seat. A seat insert is interposed between the bonnet member and valve seat for sealing cooperation with the valve stem. The seat insert includes an annular base portion having an aperture extending therethrough for communication with the inlet passage. Leg portions extend axially outward from the base portion at peripherally spaced apart intervals for abutting engagement with the bonnet member. The leg portions are disposed radially inward from an outer periphery of the base portion, and each leg portion has a predetermined peripheral width dimension less than the cross-sectional dimension of the outlet passage for allowing fluid flow therearound in all orientations of the insert in the valve chamber.