GASEOUS FLUID SUPPLY SYSTEM WITH SUBSYSTEM FOR ISOLATING A STORAGE VESSEL FROM AN END USER

摘要

A gaseous fluid supply system is disclosed comprising a subsystem for isolating the storage vessel from an end user when the end user is not operating. The subsystem comprises a recirculation loop fluidly connecting the fluid discharge line with the storage vessel and a switching device operable between a first position associated with when the end user is shut down, in which fluid is stopped from flowing from the pump to the end user, and fluid can be returned to the storage vessel through the recirculation loop and a second position associated with when the end user is running, in which fluid is supplied to the end user and fluid is stopped from flowing from the fluid discharge line to the recirculation loop. A method is also disclosed for detecting the operation state of the switching device when the end user is started.