Which of the following components is part of the 302AF fueling and defueling valve system?

The pressure differential control (DCHS-2) is an integral part of the 302AF fueling and defueling valve system. It plays a vital role in maintaining proper fuel flow and pressure regulation within the system. This component ensures that fuel is transferred safely and efficiently by monitoring pressure differentials and making necessary adjustments to keep operations within desired parameters.

In a fueling and defueling system, maintaining the correct pressure is crucial for preventing spills, leaks, or other hazardous conditions that could arise from imbalanced pressure levels. The DCHS-2 specifically helps to control the pressure differences that can occur during the processes of fueling and defueling, thus contributing to the overall safety and efficiency of the operations.

Other components like flange gaskets, vacuum control switches, and coupling poppets serve their own functions in fueling systems but do not specifically refer to the pressure differential control which is fundamental to the 302AF valve system's operation.