Patent ID: 7854239
Filing Date: 2010-12-21
Classification: F16K,Y10T

Abstract:
1. A fluid flow control device, comprising: a valve body defining an inlet, an outlet, and a throat disposed between the inlet and the outlet; a control element disposed within the throat of the valve body and adapted for displacement between a first position and a second position for controlling the flow of fluid through the valve body; a trim assembly comprising a valve seat and a retention ring, the valve seat fixed to the valve body within the throat, the retention ring threadably connected to the valve seat; and a seal comprising a graphite material, the seal compressed between the valve seat and the retention ring and engaging the valve body to provide a fluid tight seal between the trim assembly and the valve body wherein the valve seat comprises a seat ring portion and an upper ring portion disposed opposite the throat from the seat ring portion, the seat ring portion threadably connected to the valve body and defining a first seating surface adapted to be engaged by the control element when the control element is in the first position, the upper ring portion threadably connected to the retention ring wherein the retention ring defines a second seating surface adapted to be engaged by the control element when the control element is in the second position.