Praxair Technology, Inc.

William R Gerristead

Xuemei Song

Shawn M Cecula

Douglas Charles Heiderman

Stanley M Smith

Qiong Guo

Heng Zhu

This invention relates to a method and system for improved gas delivery for regulating gas at a substantially constant delivery pressure on a consistent basis. The system includes an automated redundant pressure regulation safety feature that is specifically configured along a flow network to significantly reduce the occurrence of pressure surges due to failure of the gas to be regulated to the delivery pressure. By reducing the occurrence of pressure surges and utilizing higher pressure package gas sources, the frequency of changeouts can be lowered.

Method and system for optimized gas delivery with automated redundant pressure regulation safety feature

This invention relates to a novel method and system for dispensing CO2 vapor without over pressurization from a system having multiple containers. The system includes one or more liquid containers and one or more vapor containers. The system is designed to operate in a specific manner whereby a restricted amount of CO2 liquid is permitted into the vapor container through a restrictive pathway that is created and maintained by a shuttle valve during the filling operation so that equalization of container pressures is achieved, thereby allowing shuttle valve to reseat when filling has stopped. During use, a pressure differential device is designed to specifically isolate the vapor container from the liquid container so as to preferentially deplete liquid CO2 from the vapor container and avoid over pressurization of the system until the vapor container becomes liquid dry. The system can be operated so that at least 50% of the CO2 vapor product is dispensed from the vapor container.

Method and system for optimizing the filling, storage and dispensing of carbon dioxide from multiple containers without overpressurization

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Grand Island, NY, United States of America

William R Gerristead