What type of design should final line pressure regulators have when used for cryogenic fluid central supply systems?

Final line pressure regulators used in cryogenic fluid central supply systems need to be designed to handle fluctuations in demand while maintaining a stable output pressure. A balanced design is essential for these systems because it minimizes the effects of changes in inlet pressure on the outlet pressure.

In a balanced regulator, the diaphragm and balance mechanism are configured to ensure that variations in inlet pressure do not significantly affect the regulated pressure at the outlet. This characteristic is particularly important in cryogenic applications, where the supply pressure can vary and any fluctuations can affect the system's performance and safety.

Using a balanced design helps ensure that the downstream supply maintains a consistent pressure, which is crucial for the proper functioning of medical gas systems that rely on precise delivery pressures for safety and efficacy. Hence, for cryogenic fluid systems, a balanced regulator is the ideal choice.