Patent ID: 6173736
Filing Date: 2001-01-16
Classification: F16K,Y10T

Abstract:
A diaphragm spring actuated pressure relief valve comprising:a body having an inlet and an outlet;an outlet orifice located within said body and having a flow area;a rectilinearly movable seat seal having a seat area aligned to cooperatively engage and close said outlet orifice;a stem mounted on said seat seal at a proximal end;a flexible balancing diaphragm attached to said stem;a flexible sensing diaphragm attached to said stem;a spring mounted to said sensing diaphragm in axial alignment with a distal portion of said stem anda sensing passage comprising a shroud extending into and aligned with said inlet and concurrently connecting said inlet with said balancing diaphragm and said sensing diaphragm;wherein said sensing passage has the same or larger flow area than the larger of said outlet orifice or said inlet.