Patent ID: 6167908
Filing Date: 2001-01-02
Classification: F17C,G05D,Y10T

Abstract:
A valve assembly for an apparatus under pressure; comprising: a valve casing including a connecting pipe for attachment to an apparatus under pressure, and a discharge pipe, said valve casing having formed therein a fluid pathway for connecting the connecting pipe with the discharge pipe; a shut-off valve for regulating a flow of fluid through the fluid pathway; and a control valve having a spring-loaded valve body which includes a fluid duct forming part of the fluid pathway, said valve body having one end accommodating a first sealing element movable by the valve body against a valve seat for sealing the fluid pathway and thereby separate an inlet pressure zone from an outlet pressure zone, and another end accommodating a second sealing element movable by the valve body against a seal seat, said second sealing element resting against the seal seat to block the fluid pathway in the outlet pressure zone, when a residual pressure in the apparatus under pressure drops below a predetermined level.