What is the maximum sustained gas withdrawal rate from 150-lb cylinders for vacuum transmission, measured in lbs/day per degree F?

The maximum sustained gas withdrawal rate from 150-lb cylinders for use in vacuum transmission is generally recognized as 1 lbs/day per degree Fahrenheit. This value is significant because it helps ensure safety and efficiency when handling gas cylinders, particularly in applications where controlled gas pressure and withdrawal rates are crucial.

Understanding this rate is important for operators to maintain proper gas flow without risking overdraw, which could lead to pressure drops and inconsistent performance. While the other options suggest varying rates, they do not align with established guidelines for operational safety and efficacy. The 1 lbs/day rate is a practical standard that balances the need for adequate gas supply with safety considerations in gas management systems.