The PSDF - Commercial Readiness for Coal Power - Revisited

A calibrated gas source for testing leakage indicators composed of a housing divided into two chambers by a partition having a gas passage between the chambers, a mass of liquefied gas filling one of the chambers, a valve associated with the passage for permitting gas to pass from the one chamber to the other chamber when it is under a certain excess pressure, and a capillary passage between the other chamber and the surrounding environment.