High Pressure Safety Valve HVAC: Description and Operation

An A/C compressor pressure relief valve is incorporated in the compressor A/C manifold and tube to:
^ relieve unusually high refrigerant system discharge pressure buildups of (3,792 kPa [550 psi] and above).
^ prevent damage to the A/C compressor and other system components.
^ avoid total refrigerant loss by closing after the excessive pressure has been relieved.