Which operational feature is essential to prevent freezing during vapor removal?

Maintaining proper pressure is essential for preventing freezing during vapor removal because it directly influences the phase of the refrigerant. When the pressure is too low, it can lead to the refrigerant reaching its saturation point prematurely, which may cause the refrigerant to change from a gas to a liquid and freeze. To effectively manage this, it's critical to ensure that the system operates within the correct pressure parameters, allowing the refrigerant to remain in a gaseous state and preventing ice formation that can obstruct the recovery process.

This understanding of pressure dynamics is crucial in a recovery operation, as fluctuations can affect the performance of the recovery unit and the efficiency of the vapor removal process. When working with refrigerants, a solid grasp of pressure conditions helps technicians avoid operational issues like freezing, which can lead to equipment damage and inefficiencies.