Erosion resistant soft seated valve trim

Details Erosion resistant soft seated valve trim Erosion resistant soft seated valve trim

F - Mech Eng,Light,Heat,Weapons

16

K

137/64

F16K 17/04 (2006.01) F16K 1/44 (2006.01) F16K 25/04 (2006.01)

Patent

CA 1233090

EROSION RESISTANT SOFT SEATED VALVE TRIM Abstract of the Disclosure The disclosure is related to a high pressure fluid control valve including valve seat made from a resilient, deformable material and a main valve plug which is matable with the resilient, deformable valve seat. A selectively, axially displacable valve stem is associated with the valve plug whereby a contact load placed upon the valve plug by the valve stem will cause the valve plug to be become imbedded within the deformable material comprising the valve seat when the valve is closed and thereby conform the deformable seat precisely to the contour and configuration of those portions of the valve plug which mate with the valve seat. In this manner, a precise zero-leakage mating is obtained each and every time the plug is mated with the seat. In accordance with the invention, an auxiliary throttle plug is associated with the main valve plug and is arranged to mate with a second, metal valve seat which is arranged in an area removed from the resilient, deformable valve seat. The axial movements of each of the valve plug and the throttle plug are coordinated in a manner whereby the primary throttling areas for the fluid flow, particularly during valve opening and valve closing operations are displaced to portions of the valve structure which are remote from the resilient, deformable valve seat.

478768

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