At what maximum differential pressure does the 352AF hydrant adapter's automatic bypass valve open?

The 352AF hydrant adapter's automatic bypass valve is designed to enhance operational safety and efficiency by preventing excessive pressure buildup during refueling operations. The correct answer, which indicates that the automatic bypass valve opens at a maximum differential pressure of 35 psi, reflects its engineering purpose to maintain a safe transfer of fuel while protecting the system from potential damage due to overpressure.

When the differential pressure reaches this threshold, the bypass valve activates, allowing for a controlled release of fuel back into the system, thus preventing harmful pressure spikes. This design consideration is crucial for both the structural integrity of the equipment involved and the safety of personnel during fueling operations.

Understanding this pressure threshold is essential for anyone involved in maintenance or operation of hydrant systems, as it highlights the importance of pressure management in fuel system safety. The inconsistency in other values does not provide the same reliability and safety margin afforded by the 35 psi setting, which is specifically calibrated for optimal system operation under typical conditions.