Air Products and Chemicals, Inc.

Theodore Michael Sabram

Edward Landis Weist, Jr

Blaine Edward Herb

Charles F Watson

Kuo-Kuang Hsu

Winfried Stephen Hoglen

Charles Franklin Watson

Method of operating a pressure swing adsorption system having a plurality of parallel adsorber vessels and a plurality of valves and gas manifolds adapted to introduce gas into each adsorber vessel and withdraw gas from each adsorber vessel in a cyclic series of sequential process steps. A leaking valve may be identified by (1) determining a value of an operating parameter that is a function of the mass of gas provided to a receiving adsorber vessel or withdrawn from an adsorber vessel during a selected process step, portion of a process step, or series of process steps; (2) determining the deviation of the value of the operating parameter from a predetermined reference value; and (3) using the magnitude and direction of the deviation to determine whether any valves are leaking.

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Center Valley, PA, United States of America

Theodore Michael Sabram