What does the regulated portion of the CRU-120/P connector do?

The regulated portion of the CRU-120/P connector plays a critical role in managing the pressure of emergency oxygen. Its primary function is to reduce the emergency oxygen pressure to a safe and breathable level for the aircrew in case of an emergency where supplemental oxygen is required. This regulation ensures that the oxygen delivered is not only adequate for use at altitude but also prevents damage to the oxygen mask or the user from receiving oxygen at excessively high pressure, which could lead to complications.

In the context of this question, understanding the purpose of the CRU-120/P connector is essential, as it directly relates to the safety and effectiveness of emergency oxygen delivery systems used in aviation.