Vacuum receivers should be capable of withstanding a gauge of how many inches of HgV?

Vacuum receivers are critical components in medical gas systems, designed to maintain a specific level of negative pressure for the effective operation of suction services. The capacity to withstand a gauge of 30 inches of mercury vacuum (HgV) is essential for ensuring the safety and reliability of the device in clinical settings.

This standard is based on the requirement that vacuum receivers must withstand full atmospheric pressure acting on the external surface when the device is operating under vacuum conditions. A measurement of 30 inches of HgV represents a near-complete vacuum that approximates the level of vacuum typically used in medical applications. Such a specification ensures that the vacuum receivers can effectively manage the suction needed without risking structural failure due to atmospheric forces.

Other options, although they reflect varying vacuum levels, do not meet the rigorous standards necessary for medical applications. They would not ensure the same level of reliability and structural integrity under equivalent operating conditions. Hence, the capability to manage up to 30 inches of HgV is fundamental in medical gas installation to ensure safety and functionality.