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Indian Army finds method for conversion of liquid oxygen to low pressure oxygen gas

The Indian Army on Wednesday said that it has found a way for efficient conversion of liquid oxygen to low-pressure oxygen in gaseous form that can be given to COVID patients.  

“Over seven days, the team of Army engineers in-direct consultation and material support from CSIR & DRDO put together a working solution using vaporisers, pressure relief valves, and liquid oxygen cylinders. Since oxygen was transported in liquid form in cryogenic tanks, quick conversion of liquid oxygen to oxygen gas and ensuring availability at the patients’ bed was a critical challenge faced by all hospitals managing COVID patients,” Army’s statement stated. 

The team of Amry engineers used a self-pressuring liquid oxygen cylinder of small capacity (250 liters) and processed it through a specially designed outlet pressure (4 bar) with a leak-proof pipeline and pressure valves.  

The team was led by Major General Sanjay Rihani. A prototype with two liquid cylinders capable of feeding oxygen gas for 40 beds for a period of two to three days was made functional at the base hospital in Delhi. 

“The system is economically viable and is safe to operate since it obviates high gas pressure in the pipeline or cylinders and does not require any power supply to operate. The system is capable of replication in a quick time frame,” the statement read.

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