Patent ID: 6397664
Filing Date: 2002-06-04
Classification: F16K,G01M

Abstract:
A method for detecting leakage in a flow control valve comprising the steps of:connecting a shut-off valve between a facility gas source and a first end of a fluid conduit; connecting a second end of said fluid conduit to a facility gas inlet on said flow control valve; providing a leakage detection apparatus in said fluid conduit in fluid communication with said first end and said second end of the conduit; said leakage detection apparatus comprising: a mass flow controller for detecting a fluid flow through said conduit; and a recording means for recording said fluid flow through said conduit, flowing a facility gas flow from said facility gas source into said flow control valve for opening said flow control valve said facility gas inlet on to allow a process gas to pass therethrough; shutting-of said facility gas flow by said shut-off valve to stop said process gas from passing therethrough; and detecting any residual facility gas flow through said flow control valve into said process gas by said leakage detection apparatus.