Patent ID: 6318406
Filing Date: 2001-11-20
Classification: F16K,Y10T

Abstract:
A valve assembly for relieving the fluid pressure in a pressure vessel comprising:a main body having an inlet, a main valve chamber, and an outlet;a main fluid responsive valve member mounted in said main valve chamber for reciprocal movement between open and closed positions relative to said inlet for fluid pressure relief of said pressure vessel;a dome chamber adjacent an outer end of said fluid responsive valve member; anda pilot valve structure mounted on said main body in axial alignment with said fluid responsive valve member and forming an outer end of said dome chamber;said pilot valve structure including a diaphragm and an inlet fluid sensing tube secured to said diaphragm for movement with said diaphragm, said inlet fluid sensing tube having an inner end in fluid communication with said inlet and an outer end extending through said diaphragm and in fluid communication with an outer side of said diaphragm to provide an inlet fluid sensing chamber on said outer side of said diaphragm.